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Section through a leaf Stock Photos and Images
RM2AJ3ATD–Recueil des travaux botaniques néerlandais . Fig. 43. Fie. 44.. Fig. 43. fouith leaf. The two separate xylem cells cannot be accountedfor, unless they belong to the fîfth leaf and form the beginningof its leaf trace. Otherwise, we should hâve hère a realexample of stelar tissue. That there is no stelar tissue thedlagrams in Figs. 41 and 42 demonstrate clearly. The pithwas of the same ongin as in B. simplex. Fig. 43 shows a 365 longitudinal section through a young plant in the plane ofthe apical cell. Conditions are exactly as in B. simplex. Soare the root traces, which therefore need not be fu
RMMCKWK9–. Fig. 36. Turnip Diseases. a. and h. Anthracnose, c. cross section through acervulus, d. anthracnose spores, e. Cylindrosporium leaf spot, /. Phoma rot, g. Sclerotinia rot (r. and d. after Higgins).
RMPG40HP–. Plant life and plant uses; an elementary textbook, a foundation for the study of agriculture, domestic science or college botany. Botany. 4i8 THE VASCULAR PLANTS. Fig. 209. — Aspidium, a common fern. A, the entire plant, showing the rhizome, the coiled young leaves arising from it, and three mature fronds, one of which shows sori as dark dots on the under surface. B, a leaflet, showing the shield- like coverings (indusia) of the sori. C, section through a sor'us and the leaf which bears it, as seen through a microscope; i, the indusium; s, the sporangia. D, a sporangium, showing the annulus
RM2AXH69J–American journal of pharmacy . prickles, which is shown in longitudinal section, attached ;magnification, 150 diameters. A, epidermal cells ; b, parenchyma of upperportion of mid-rib ; c, a portion of the lamina of the leaf; d, xylem tissue ofmid-rib ; c, cambium zone ; /, phloem tissue of mid-rib ; g, parenchyma oflower portion of mid-rib ; h, collenchyma tissue ; i, slightly lignified tissue ofthe prickle, which occurred on the mid-rib and was cut through longitudinally;k, epidermal tissue, more lignified. Am. Jonr. Pbarm.)February. Ift97. j Solatiion Carolinense. 89 Steyn.—Zinc chloriodide
RMMCKWJ9–. Fig. 66. Tomato Diseases. a. Septoria leaf spot, b. section through a pycnidium of Seploria lycopersiii (after Levin), c. section through acervulus of Collelolrichum phoinnidfs (after Venus Pool), d. and e. Melanconium rot. /. section through an acervulus of the Melan- conium fungus (d. to/, after Tisdale).
RMPG3FE8–. A textbook of botany for colleges and universities ... Botany. REPRODUCTION AND DISPERSAL 815 (i.e. Marsilea, Salvinia, and Azolla) and in SelagineUa and Isoetes there are two kinds of spores, namely, small spores or microspores, and large spores or megaspores; such a condition is known as keierospory (fig. 303). Upon germination the microspores give rise to male plants and the 1129. ^(128 Figs. 1128, 1129. — Reproduction by asexual spores in a fern (Aspidium): 1128, a leaf segment (pinnule) with fruit dots (sori), each with a shield-shaped cover (indusium); 1129, a cross section through a s
RM2AJA6M4–The natural history of plants, their forms, growth, reproduction, and distribution; . / u.. ^uy . iv:r- ^. Fig. 86.—Folding of Grass-leaves. 1 Vertical section through part of the open leaf of Stipa capillata; x240. 2 Vertical section through an entire open leaf.8 Vertical section through a closed leaf; x30. * Vertical section through a portion of the leaf of Festuca alpestris; x210.5 Vertical section through an entire open leaf. * Vertical section through a closed leaf; x30. whose outer walls are much thickened. A vertical section through the leaf ofFestuca punctoria, a native of the Tau
RMMCKWGW–. Fig. 66. TOxMato Diseases. a. Septoria leaf spot, b. section through a pycnidium of Septoria lycopersici (after Levin), c. section through acervulus of Colletolrichum phomoides (after Venus Pool), d. anil e. Melanconium rot, /. section through an acervulus of the Melan- conium fungus {d. to f. after Tisdale).
RMPG4BFJ–. Diseases of plants induced by cryptogamic parasites : introduction to the study of pathogenic Fungi, slime-Fungi, bacteria, & Algae . Plant diseases; Parasitic plants; Fungi. Fig. 130.—Sections of Maple leaves showing the upper epidermis ruptured by 1, RKytisma acerinwm; 2, Rhytisma 2mnctatum. Fig. 131.—Rhytisma symvietricum Miill. Two leaves of Salix purpurea vrith stromata. A, The upper side. B, The lower side. C, Longitudinal section through the same leaf, showing numerous apothecia on the upper side, fewer on the lower ; the shaded middle part represents leaf-tissue, the remainder is
RM2AWPE4R–The structure & development of the mosses and ferns (Archegoniatae) . Fig. 233.—Longitudinal section of a young vegetative shoot, showing two young leaves (L.), X200;B, section passing through the base of a somewhat older leaf; /i, vascular bundle ; C, sectionpassing through a joung bud {k). median longitudinal sections through a vigorous sterile stem ofE. telinateia or E. aivense before it appears above ground.The young bud (Fig. 233, C) originates from a single epidermalcell just above the insertion of the leaf This cell enlargesand is easily recognisable. In it are formed three intersecting
RMMCKWMK–. Fig. 23. LETTL'cii Diseases. a Germinating sclerotium of Silerolinia liherliana the cause of lettuce drop, b. section of fruiting cup (apothecium) showing asci, ascospores and paraphyses of .S'. Uberliana, c. section through sclerotium of 6. librrHanii. d. germinating ascospore of .S'. liherliana (a. to d. after F. S. Stevens), e. Cercospora leaf spot.
RMPG179N–. Studies in fossil botany . Paleobotany. THE STEM OF CALAMITES 27 side by side in different parts of one and the same specimen. The following considerations serve to identify the leaf-traces. We constantly find in all specimens of Catamites, that at every joint a whorl of small and m.r> m.p. Fig. 8.—Ca/amites communis. Tangential section of wood, passing through a node, and cut near the pith. v.b., Vascular bundles of the stem. /./., leaf-traces cut transversely as they turn outward at the node. Note that they are only half as numerous as the bundles of the stem, m.r., primary medullary ra
RM2AWPW1W–Text-book of botany, morphological and physiological . ?vermes: A the bulbous stem seen from above, B seen from below, C from the side and cutthroujjh lengthwise ; fff the circular line of scars of the cataphyllary leaves, k k the corms which t,frow in their axils ;b the base of the decayed flower- and leaf-stem, by its side (lik in Q next years bud, from which a new corm andflower-stem will be produced; D longitudinal section through this bud, n « its cataphyllary leaves, // foliage-leaves,h bract, / perianth, a anthers, k a bud in the axil of a foliage-leaf. pale. When the phyllotaxis of suc
RMMCKWPK–. Fig. 23. Lettuce Diseases. a. Germinating sclerotium of Sclerolinia lihertiana the cause of lettuce drop, b. section of fruiting cup (apothecium) showing asci, ascospores and paraphyses of S. liberliana, c. section through sclerotium of .S. lihertiana, d. germinating ascospore of S. lihertiana (a. to d. after F. S. Stevens), e. Cercospora leaf spot.
RMPG214J–. A textbook of botany for colleges and universities ... Botany. 558 ECOLOGY. Fig. 800. — A cross section through a stoma from a leaf of the carnation (Dianthus CaryophyUus); by reason of the heavy cu- tinization of the outer epidermal wall (w), the stoma Ues below the surface level of the leaf; note the thin places Qi) above and below the dorsal wall {d) of the guard cell fe)> representing the so-called hinges which are thought to facilitate guard-cell move- ment; the chamber above the stoma is called a stomatal pit; general lettering as in fig. 79s; highly magnified.. Please note that the
RM2AG3PPP–. Report of the State Entomologist on injurious and other insects of the state of New York. PORIA RADICULOSA (Peck) Sacc. Plate 17 Poria semitincta (Peck) Sacc. 1 Specimens from the type collection, x i. a Growing on the surface of a dead fallen leaf.b Growing on rotten wood. 2 Specimen in New York State Museum herbarium, collected at South Bethlehem, N. Y. x i. 3 Microphotograph of vertical section through hymenium. x i6o. 4 Single hypha from the trama. 5 Hyphae from the subiculum and the growing margin. This type also represented in the trama. 6 Mature spores. 154 N. Y. State Botanists Repor
RMPG3PNT–. Elementary woodworking. Woodwork; Trees. Fid. 83. Red Leaf of Oak divisions, while the black oak has five. However, the leaves of these two trees vary consider- ably, and one must always look for the typical leaf, which is the one shown in the sketch. The black-jack is a small, shrubby tree,wdth branches often twisted and contorted, and its wood is not very valuable except as fuel or for making charcoal.. Fig. 84. Wood of the Red Oak, showing three section.?. The one on the left shows annual rings obtained by a horizontal cut through the tree. Cen- tral view shows vertical cut at center of t
RM2AG3R98–. Report of the State Entomologist on injurious and other insects of the state of New York. PORIA RADICULOSA (Peck) Sacc. Plate 17 Poria semitincta (Peck) Sacc. 1 Specimens from the type collection, x i. a Growing on the surface of a dead fallen leaf.b Growing on rotten wood. 2 Specimen in New York State Museum herbarium, collected at South Bethlehem, N. Y. x i. 3 Microphotograph of vertical section through hymenium. x i6o. 4 Single hypha from the trama. 5 Hyphae from the subiculum and the growing margin. This type also represented in the trama. 6 Mature spores. 154 N. Y. State Botanists Repor
![. Lessons in botany. Botany. FUNGI: WHEAT RUST. 133 For a fuller study of the wheat rust and of other fungi see the author's larger " Elementary Botany," Chapters XX, XXI.. Wheat rust. Fig. 113- Section through leaf of barberry at point affected with the cluster-cup stage of the wheat rust; spermagonia above, aecidia below. (After Marshall-Ward.) Synopsis. A parasite on grains, grasses, and on the barberry. Vegetative part of plant; mycelium growing within the tissues of the host. Fruiting part of the plant. 1st. Red rust (one-celled spores in pustules on blades and stems of the whea Stock Photo](https://c8.alamy.com/comp/PG00XN/lessons-in-botany-botany-fungi-wheat-rust-133-for-a-fuller-study-of-the-wheat-rust-and-of-other-fungi-see-the-authors-larger-quot-elementary-botanyquot-chapters-xx-xxi-wheat-rust-fig-113-section-through-leaf-of-barberry-at-point-affected-with-the-cluster-cup-stage-of-the-wheat-rust-spermagonia-above-aecidia-below-after-marshall-ward-synopsis-a-parasite-on-grains-grasses-and-on-the-barberry-vegetative-part-of-plant-mycelium-growing-within-the-tissues-of-the-host-fruiting-part-of-the-plant-1st-red-rust-one-celled-spores-in-pustules-on-blades-and-stems-of-the-whea-PG00XN.jpg ". Lessons in botany. Botany. FUNGI: WHEAT RUST. 133 For a fuller study of the wheat rust and of other fungi see the author's larger " Elementary Botany," Chapters XX, XXI.. Wheat rust. Fig. 113- Section through leaf of barberry at point affected with the cluster-cup stage of the wheat rust; spermagonia above, aecidia below. (After Marshall-Ward.) Synopsis. A parasite on grains, grasses, and on the barberry. Vegetative part of plant; mycelium growing within the tissues of the host. Fruiting part of the plant. 1st. Red rust (one-celled spores in pustules on blades and stems of the whea Stock Photo")
RMPG00XN–. Lessons in botany. Botany. FUNGI: WHEAT RUST. 133 For a fuller study of the wheat rust and of other fungi see the author's larger " Elementary Botany," Chapters XX, XXI.. Wheat rust. Fig. 113- Section through leaf of barberry at point affected with the cluster-cup stage of the wheat rust; spermagonia above, aecidia below. (After Marshall-Ward.) Synopsis. A parasite on grains, grasses, and on the barberry. Vegetative part of plant; mycelium growing within the tissues of the host. Fruiting part of the plant. 1st. Red rust (one-celled spores in pustules on blades and stems of the whea
RM2AXHWE6–The Danish Ingolf-Expedition . .:?.: /?u-C[I(J^rnirjtI/u:&/; -- Plate VII. PageFig. I. Reinera parenchyma n. sp. Vi Zl — 2. Hamacantha Boiuerbankt n.s^., showing one osculnm; the surface damaged in places. Vi 99 — 3. Haviacantha Boioerbanki n. sp., showing several oscnla. 7i — — 4. Desniacella hamifera n. sp. A leaf-shaped fraginent, the skin almost quite want- ing- Vi 93 — 5. Desniacella hamifera n. sp. The middle part of a short-stalked, calicular specimen. Vi - 6. Desniacella hamifera n. sp. Radial longitudinal section through the wall, showing the skeleton. 3/2 — 7. Desmacella groenlandica
![. Elements of botany. Botany; Botany. 60 ELEMENTS OF BOTANY. The green layer of tlie bark in young shoots does muchi toward collecting and preparing the food of the plant from, air and water, but this work may be best explained in connec- tion with the study of the leaf, Chapter XII.. Fig.50.—Cross-Section of Fir Wood. s, a resin passage; m, medullary rays. (Much magnifled.) Fig. 51. —Longitudinal Kadial Section through a Eapidly Growing Young Branch of Pine. t, t', t", bordered pits on wood-cells; st, large pits where medullary rays lie against wood- cells. (Much magnifled.) Finally, the Stock Photo](https://c8.alamy.com/comp/PG4AEJ/elements-of-botany-botany-botany-60-elements-of-botany-the-green-layer-of-tlie-bark-in-young-shoots-does-muchi-toward-collecting-and-preparing-the-food-of-the-plant-from-air-and-water-but-this-work-may-be-best-explained-in-connec-tion-with-the-study-of-the-leaf-chapter-xii-fig50cross-section-of-fir-wood-s-a-resin-passage-m-medullary-rays-much-magnifled-fig-51-longitudinal-kadial-section-through-a-eapidly-growing-young-branch-of-pine-t-t-tquot-bordered-pits-on-wood-cells-st-large-pits-where-medullary-rays-lie-against-wood-cells-much-magnifled-finally-the-PG4AEJ.jpg ". Elements of botany. Botany; Botany. 60 ELEMENTS OF BOTANY. The green layer of tlie bark in young shoots does muchi toward collecting and preparing the food of the plant from, air and water, but this work may be best explained in connec- tion with the study of the leaf, Chapter XII.. Fig.50.—Cross-Section of Fir Wood. s, a resin passage; m, medullary rays. (Much magnifled.) Fig. 51. —Longitudinal Kadial Section through a Eapidly Growing Young Branch of Pine. t, t', t", bordered pits on wood-cells; st, large pits where medullary rays lie against wood- cells. (Much magnifled.) Finally, the Stock Photo")
RMPG4AEJ–. Elements of botany. Botany; Botany. 60 ELEMENTS OF BOTANY. The green layer of tlie bark in young shoots does muchi toward collecting and preparing the food of the plant from, air and water, but this work may be best explained in connec- tion with the study of the leaf, Chapter XII.. Fig.50.—Cross-Section of Fir Wood. s, a resin passage; m, medullary rays. (Much magnifled.) Fig. 51. —Longitudinal Kadial Section through a Eapidly Growing Young Branch of Pine. t, t', t", bordered pits on wood-cells; st, large pits where medullary rays lie against wood- cells. (Much magnifled.) Finally, the
RM2AG86B6–. American journal of pharmacy. Figs. 7-9. Digitalis Thapsi Lin., showing structure of stem and stomata on leaf.. Fig. 10. Cross-section through midrib of leaf of Digitalis Thapsi Lin. ^iprii; fgiT^ ^ Digitalis Thapsi Lin. 151 PHARMACOLOGIC ACTION. By Herbert C. Hamilton. A preliminary investigation of Digitalis Thapsi to determinewhether it possessed any of the therapeutic properties of the officialdrug was carried out on frogs by the M. L. D. method for stand-ardization.^ The drug in tincture form was properly diluted andinjected into frogs in gradually decreasing doses until the minimumwas
RMPG214E–. A textbook of botany for colleges and universities ... Botany. Fig. 800. — A cross section through a stoma from a leaf of the carnation (Dianthus CaryophyUus); by reason of the heavy cu- tinization of the outer epidermal wall (w), the stoma Ues below the surface level of the leaf; note the thin places Qi) above and below the dorsal wall {d) of the guard cell fe)> representing the so-called hinges which are thought to facilitate guard-cell move- ment; the chamber above the stoma is called a stomatal pit; general lettering as in fig. 79s; highly magnified.. Fig. 802. — A cross sec- tion thr
RM2ANAK90–A text-book of mycology and plant pathology . Fig. 105.—Septoria leaf spot disease of celery, or celery blight. {After Coons, G. N.and Levin, Ezra, Spec. Bull. 77, Mich. Agric. Coll. Exper. Stat., March. 1916. SPORES,. Fig. 106.—Section through leaf spot of celery blight (Septoria) showing hyphae)in leaf tissue and pycnidium with exuding pycnospores. (After Coons, G. H., andLevin, Ezra, Spec. Bull. 77, Mich. Agric. Coll. Exper. Stat., March, 1916.) 264 MYCOLOGY eludes the fungi which cause the leaf spot of the pear, Septoria pyricola,the late blight of the celery S. petroselini (Figs. 105 and
RMPG4CKH–. Diseases of truck crops and their control . Vegetables. Fig. 38. Cantaloup Diseases. a. Soft rot, b. individual germs of soft rot (a. and 6. after Giddings), c. young cantaloup plant artificially inoculated with Mycosphserella wilt, d. section through a perithecium of Mycospheerella citrullina, showing immature asci, e. ascospores of M. citrullina (c. to e. after Grossenbacher),/. Altemaria leaf blieht, g. Conidiophores and spore of Macrosporium cucumerinum (a^âcâ ^»iis«.yj--= .»= .v. - .;â -i^i;â.. Please note that these images are extracted from scanned page images that may have been di
RM2CEEM1H–. Science of the sea. An elementary handbook of practical oceanography for travellers, sailors, and yachtsmen. Fig. 64.—Sargassum (Blake). Fig. 65.—Section through Frond ofFucus. (Afterbornet and thuret.) BROWN AND RED ALGiE 149 y. I - &-. Fig. 66.—Sargassum.a. Air vesicles ; b, cylindrical conceptacula c, leaf.
RMPG2KDA–. Pharmaceutical botany. Botany; Botany, Medical. rage tissue. â )i^3C?oc:3g^g:JOCD Fig. 26. Fig. 27. Fig. 26.âCross-section through a portion of rubber leaf, showing the large per- centage of water-storage tissues on both sides of the leaf, and the relation of the palisade and spongy parenchyma to the lateral veins. {From Steiens.) Fig. 27.âSurface view of the epidermis of a leaf showing several stomata. The guard cells are dotted. {From Hamaker.) Hispid, when covered with short, stiff hairs. Ex.: Borage. ToMENTOSE, densely pubescent and felt-like, as the Mullein leaf. Spinose, beset with spi
RM2CDE4R0–. The structure and development of crown gall : a plant cancer . m y W v Daisy XXXI. Vertical section of another primary leaf tumor; normal part at the left (p. 50). Bui. 255, Bureau of Plant Industry, U. S. Dept. of Agrici Plate XCVI. Tobacco. Infected needle-track through pith; no proliferation (p. 50). Bui. 255, Bureau of Plant Industry, U. S. Dept. of Agriculture Plate XCIX.
RMPG4BJ7–. Botany for agricultural students . Botany. Fig. 238. â A portion of a cross section through a node of Sugar Cane, showing rods of wax secreted by the epidermis. Enlarged many times. After De Bary.. Fio. 239. â A portion of a sec- tion through a Mullein leaf, show- ing the epidermis with its branched hairs. After Andrews. case in soils that are cold or frozen, then even a small amount of transpiration may be injurious. Protection against Injuries Resulting from Transpiration. â Plants may be protected against the injurious â effects of trans- piration by having their transpiring surface modif
RM2CPHN3J–. A history of birds . re going to sleep so that snakes or lizardsfumbling about the pocket or false entrance give the alarm, whenthe bird escapes by pushing a hole through the back of the nest. One other example of pendant nests and we must concludethis section: this is furnished by the Tailor-bird {Siitorialongicauda). It is an extraordinary cradle that this creaturemakes, inasmuch as it draws together the edges of a leaf andholds them in position by stitching them, either by vegetablefibres or threads spun by man—when the nest is built nearhuman habitations. Sometimes two leaves are similar
RMPG179M–. Studies in fossil botany . Paleobotany. 3- STUDIES IN FOSSIL BOTANY came to exactly the same conclusion independently, from the study of the French material. These observa- tions show that very often the small lateral branches. I [(). g.-Calamites communis. Tangential section of wood, passing through a node as in Ftg. S, but showing the base of a branch, inserted between and above two of 'the leaf-trace bundles, f, vascular bundles of stem ; m, leaf-traces ; c, medullary rays X 20. After Williamson, Phit. Trans, Will. Coll. 90. were cast off early, a fact which admits of two ex- planations.
RM2CH0JGM–. The Street railway journal . the country and the difficulties encountered in laying out andbuilding the road. The project was undertaken by the NorthAugusta Electric & Improvement Company, a syndicate en-gaged in the development of the country through which the linepasses. This corporation owns 7000 acres of land in SouthCarolina, just across the Savannah River from Augusta, and itis also interested in many of the industrial enterprises of thevicinity. The natural scenery has attracted many wealthyNorthern people to this section, and the presence of beautifullong leaf yellow pines in abundan
RMPG41BJ–. Foundations of botany. Botany; Botany. 2;88 FOUNDATIONS OP BOTANY. Fia. 210.—Spore-Plamt of a Tern (Aspidium MUx-mas). ^, part of rootstock and fronds, not quite one-sixth natural size ; fr, yoting fronds unrolling; JB, under side of a pinnule, showing sori, s; C, section through a sorus at right angles to surface of leaf, showing indusium, i, and sporangia, 8; I>, a sporangium discharging spores. (£ is not far from natural size. C and D are considerably magnified.). Please note that these images are extracted from scanned page images that may have been digitally enhanced for readability
RM2CDCB21–. Fungous diseases of plants, with chapters on physiology, culture methods and technique . Fig. 202. PucciNiA graminis. (After Ward)rt, section of barberry leaf showing spermogonia and aecidia; h, aecidium stage, which breaks through the epidermis in somewhat similarmanner. The spermogonium shows a very simple development,resulting by the gradual growth in extent of a small mass of fila-mentous hyphae developing in an intercellular manner just beneath 412 FUNGOUS DISEASES OF PLANTS the upper epidermis. At maturity the flask-shaped body consistsof an indefinite wall, later giving rise to numero
RMPG175E–. Studies in fossil botany . Paleobotany. A Fig. 62.—Lepidophloios, sp. A. Tangential section from the outside of a stem, passing through the leaf-bases, and showing their characteristic form. Slightly enlarged. B. A single leaf-base, to show details, v.b, collateral vascular bundle ; pa, the two parichnos-strands; lg, ligule in its pit. X 10. Will. Coll. 1974 A. (G. T. G.) cushion below the scar (see Fig. 5 5 a, a) were in connection with the parichnos, as was first shown by Potonie in a Lepidophloios. Professor Weiss has recently investigated the structure, and finds that in Lepidophloios th
RM2CEKJHK–. Memoirs and proceedings of the Manchester Literary & Philosophical Society. es thus exhibits astriking correspondence with the relations of the youngleaves and their leaf-traces to the depressed growing pointof the shoot. These points are further illustrated in Fig. 5which represents a median longitudinal section in theplane of the lobes through a smaller but complete plant.The other two sections in Fig. 3 are sufficiently far 16 LANG, Morphology of tJie Stock of Isoetes lacustris. removed from the median plane to miss the primary steleof the stem. The section in Fig. 3 C cuts across theexte
![. Fossil plants : for students of botany and geology . Paleobotany. XLVIIl] PREPINUS 401 Prepinus statensis Jeffrey. The short shoots (fig. 791, B), rather less than 1 cm. long, consist of a relatively broad axis bearing on the upper part nume- rous spirally disposed truncate portions of leaves, in some cases. Pio. 791. Prepinus statensis. A, Transverse section of a detached leaf believed to belong to P. statensis. B. Short shoot showing the basal portions of needles and, below, the scars of scale-leaves. C. Transverse section through part of a leaf-fascicle. (After Jeffrey; A, x 30; B, x 7; C Stock Photo](https://c8.alamy.com/comp/PG15NY/fossil-plants-for-students-of-botany-and-geology-paleobotany-xlviil-prepinus-401-prepinus-statensis-jeffrey-the-short-shoots-fig-791-b-rather-less-than-1-cm-long-consist-of-a-relatively-broad-axis-bearing-on-the-upper-part-nume-rous-spirally-disposed-truncate-portions-of-leaves-in-some-cases-pio-791-prepinus-statensis-a-transverse-section-of-a-detached-leaf-believed-to-belong-to-p-statensis-b-short-shoot-showing-the-basal-portions-of-needles-and-below-the-scars-of-scale-leaves-c-transverse-section-through-part-of-a-leaf-fascicle-after-jeffrey-a-x-30-b-x-7-c-PG15NY.jpg ". Fossil plants : for students of botany and geology . Paleobotany. XLVIIl] PREPINUS 401 Prepinus statensis Jeffrey. The short shoots (fig. 791, B), rather less than 1 cm. long, consist of a relatively broad axis bearing on the upper part nume- rous spirally disposed truncate portions of leaves, in some cases. Pio. 791. Prepinus statensis. A, Transverse section of a detached leaf believed to belong to P. statensis. B. Short shoot showing the basal portions of needles and, below, the scars of scale-leaves. C. Transverse section through part of a leaf-fascicle. (After Jeffrey; A, x 30; B, x 7; C Stock Photo")
RMPG15NY–. Fossil plants : for students of botany and geology . Paleobotany. XLVIIl] PREPINUS 401 Prepinus statensis Jeffrey. The short shoots (fig. 791, B), rather less than 1 cm. long, consist of a relatively broad axis bearing on the upper part nume- rous spirally disposed truncate portions of leaves, in some cases. Pio. 791. Prepinus statensis. A, Transverse section of a detached leaf believed to belong to P. statensis. B. Short shoot showing the basal portions of needles and, below, the scars of scale-leaves. C. Transverse section through part of a leaf-fascicle. (After Jeffrey; A, x 30; B, x 7; C
RM2CEKP4T–. Journal of the Straits Branch of the Royal Asiatic Society. />Qtr- Fips. 9 and 10. Two cases in which the leaves of the whorl diff red fromeach other in very little. leaves are in a whorl of four. In both genera with the next leaf, thealternate condition sets in which persists through life. There is no important difference in the microscopic structureof the petiole of a leaf of the whorl and of the fifth leaf: bothin section about the middle exhibit (see fig. 11) a ring ofnormal cortex enclosing a ring of sclerenchyma within which isphloem and xyleim and an included bundle with the xylem
RMPG16FR–. Fossil plants : for students of botany and geology . Paleobotany. ,^^p?'^)-. FiQ. 133. Isoetes lacustris. A. Transverse section of stem: cr, cortex; x, i^ xylem; c, cambium; a, thin-walled tissue; It, leai-traces; 6, dead tissue. B, C, D. Portions of A enlarged. E. Longitudinal radial section of sporophyll-base: v, velum; I, ligule ; bb, vascular bundle; m, megaspores; t, sterile tissue. F. Longitudinal section through the base of a root. G. Transverse section of root. H. Transverse section of sporophyll, showing sporangium with trabeculae, t; leaf-trace, (iJ), and two groups of secretory c
RM2CH0GD6–. The Street railway journal . PLAN AND SECTIONS OF taining the most severe service. The character and extent ofthe trestle work are shown in the views presented, and the de-tails in the plan, section and elevation herewith. Timber usedfor trestles is all selected long-leaf yellow pine, put up with thegreatest care. It is all drift-pin construction, steel pins beingused for the purpose. either direction, additional feeder is run for about 2 miles,This low-tension feed wire instead of being placed on crossarms or brackets, is suspended upon a porcelain insulator,through which the span-wire is r
RMPG4A4B–. Essentials of botany. Botany; Botany. Fig. 204. Spore-Plant of a rem (Aspidium Filix-mas). A, part of rootstock and fronds, not quite one-sixth natural size; fr, young fronds unrolling (not usually found at the same season as the mature fronds); B, under side of a pinnule, showing sori s; C, section through a sorus at right angles to surface of leaf, showing indusium i, and sporan- gia s; B, a, sporangium discharging spores. (B is not far from natural size. C and D are considerably magnified.) 281. Please note that these images are extracted from scanned page images that may have been digita
RM2CHMWA3–. Heredity and evolution in plants . FIG. 9.—Cross-section through the marginal sorus of a sporophyll ofthe bracken fern (Pleris aquilina). I, palisade layer; fb, vascular bundle;xp, sporangium; in, indusium. (Greatly magnified.) as, for example, Polypodium, is composed of a cluster oftiny stalked cases. The cases contain minute unicellularreproductive bodies called spores, and the entire structureis a sporangium. The place where the sporangia areattached to the leaf is the sporangiophore1 (Fig. 9), andover all is often found a thin membranous covering, theindusium (Figs. 9 and 10). In some fe
RMPG20TW–. A textbook of botany for colleges and universities ... Botany. 946 Figs. 945, 946. — Cross sections of leaves of a loose- strife (Lysimachia): 945, a section through a scale leaf, showing a relatively undif- ferentiated mesophyll (m), resembling sponge tissue, and the prominently cutinized lower (outer) epidermis (e); 946, a section through a foli- age leaf, showing a row of conspicuous palisade cells (p), a broken row of shorter palisade cells (p'j, and the sponge tissue (s); figs. 945 and 946 highly and equally Fig. 947. — An inflor- escence bud of the arti- choke (Cynara Scolymus), showin
RM2CHMX0M–. Heredity and evolution in plants . 4. Spore-bearing Leaves.^ The second type of fern-leaf bears, on its underside, numerous fruit-dots or sort(singular sorus) (Figs. 7 and 8). These structures have-to do with reproduction. A single sorus of such a fern. FIG. 9.—Cross-section through the marginal sorus of a sporophyll ofthe bracken fern (Pleris aquilina). I, palisade layer; fb, vascular bundle;xp, sporangium; in, indusium. (Greatly magnified.) as, for example, Polypodium, is composed of a cluster oftiny stalked cases. The cases contain minute unicellularreproductive bodies called spores, and
RMPG4EKJ–. Minnesota plant diseases. Plant diseases. 354 Minnesota Plant Diseases.. Fig. 187.—Spores of the apple scab fungus. A. Portion of a section through a scab spot on an apple; b, fungus threads spreading under and lifting the cuticle; a and c, partly disorganized cells of the apple; e, healthy cells of the apple. B. Two spore-bearing stalks giving rise to summer Spores. C. Spores germinating. D. Portion of a section through an affected leaf of an apple which has lain on the ground over winter and has given rise to the winter spore stage of the disease; g, spore-case containing a bundle of spore
RM2CE2PK7–. Plants and their uses; an introduction to botany . 524 LIFE-HISTORIES. Fig. 348.—Peat mosses. ,1, part of a ganietophyte, enlarged, showing malebranches (a, a, n, a) and female branrhes (h, h). B, part of a leaf (.S.cymhifolium), ^l^, showing the net-work of green cells surrounding thelarge ones which fill with water or air. C, vertical section through asmall piece of leaf (6. cuspidatum) showing the small and the largeperforated cells, f. D, cross-section through outer part of stem(S. cymhifolium) highly magnified. E, male branch of .S. acutifolium,with a vegetative branch at the base, ^,.
RMPG41K6–. Elements of botany. Botany; Botany. * Fig. 207. —A Fern (Aspidium Fllix-mas). 1, general view of the plant; a, young fronds unrolling; 2, cross-section of the rootstock, showing fibro-vascular bundles, a a 3, a pinnule with fruit-dots ; a.a, indusium ; b, spore-cases ; 4, vertical section through 3 a; 5, vertical section at right angles to that of (4), showing : a, section of pinnule of leaf; h, section of indusium ; c, spore-cases ; 6, a single spore-case, with its stalk, ct, and its elastic ring, c, discharging spores at d. (.1 is reduced to about natural size ; 2, 3, are sli^tly magnif
RM2CDEC54–. Nature and development of plants . Fig. 4. Blade of lilac leaf cut across showing the more compact arrange-ment of cells upon the upper side of tin- leaf, section through sucfi a blade, cut as in Fig. 4 so that we can lookinto the end of the blade, shows that the leaf is composed of ;icomplicated arrangement of cells. Fig. 5 is a greatly enlargedview 1 if Fig. 4 taken at .V.4. The Epidermis.- It is now seen that a layer of compact cellse) Burrounds the leaf on all Bides. In fad such a layercover- all parts of the plant body. This layer of cells, the epi-dermis, is provided with minute openin
RMPG177G–. Studies in fossil botany . Paleobotany. go STUDIES IN FOSSIL BOTANY many roots ; such a structure is very rare in stems, though we find an example in the smaller branches of Psilotum. In some French species of Sphenophyllum,. Fig. 36.—Sphenopkyllum quadrifidum. A. Radial section through a node, showing leaves, cut in the plane bin of Fig. B. In the middle is the stele, showing primary and secondary wood, c', phloem ; d', inner, e, outer cortex ; z', leaf-trace ; /, base of leaf; m, axillary bud (?); n, cortical emergence below node. B. Transverse section of same stem, a little above node, sh
RM2CGXBW5–. Electric railway journal . Part Side Elevation and Cross Section of Side-Door Cars Used in the New York Subway Experimental Train. 382 ELECTRIC RAILWAY JOURNAL. [Vol. XXXIII. No. 9. HOME-MADE TRAILERS IN SHREVEPORT, LA. Through the courtesy of L. M. Levison, secretary andgeneral manager of the Shreveport (La.) Traction Com-pany, the accompanying views are available of one of thesemi-open double-truck trail cars built by this companyfor State fairs, baseball grounds, parks and similar spe-cial service. The bodies, which are built of native cypressand long-leaf pine, are 37 ft. long over all a
RMPG415W–. The essentials of botany. Botany. 170 BOTANY. parasite, and at length burst through the epidermis (Fig. 94, A and I). The oonidia quickly drop out and are car-. FiG. 94.—Wheat-nist (Puccinia graminis). I, a cross-section of a Barberry- leaf through a mass of Cluster-cups; a, a, a, cups opened and slieddingr their conidia; p, and A, above, cu^s not yet opened; sp, sp, spermogones which pro- duce spermatia, whose function is not Icnown. ii, three Red-rust spores, ttr, on stalks: t, a Black-rust spore. 7/J, a mass of Black-rust spores bursting through the epidermis, e, of a leaf. All highly mag
RM2CE7GJW–. Transactions . as country-rock. (C. Le Neve Foster.) Fig. 93.—Impregnation of the granite with tin-ore at East WhealLovell, Cornwall. (C. Le Neve Foster.) Fig. 94.—Specimens of ore from the Kongens mine at Eoras,Norway. (Th. Kjerulf.) Fig. 95.—Specimen of ore from the Mug mine, Trondhjem, Nor-way ; a, pyrrhotite; b, mica; c, quartz; d, chalcopyrite. (Th.Kjerulf.) Fig. 96.—Polished section of ore from Amraeberg, Sweden. Fig. 97.—Ditto, showing leaf-silver in fissures in zinc-blende. FiG. 98.—Section through the Copper Falls mine, Lake Superior ;a, trap ; 6, ash-bed at depth of 80 feet; c, amy
![. Diseases of truck crops and their control . Vegetables. Fig. 47. Bean Diseases. a. and fc. Rust on leaf and pods, c. section through bean leaf showing bean rust, summer spores, d. section through bean leaf, showing bean rust, winter spores, e. anthracnose, /. section through bean seed, showing relation of anthracnose to the host (c. d. and /. after Whetzel). g. Cercospora leaf spot, A. Isariopsis griseola leaf 5T»ot * ''r^nj/^-ephor^ ."Mid conidia of Isariopsis.. Please note that these images are extracted from scanned page images that may have been digitally enhanced for readability - Stock Photo](https://c8.alamy.com/comp/PG4CHW/diseases-of-truck-crops-and-their-control-vegetables-fig-47-bean-diseases-a-and-fc-rust-on-leaf-and-pods-c-section-through-bean-leaf-showing-bean-rust-summer-spores-d-section-through-bean-leaf-showing-bean-rust-winter-spores-e-anthracnose-section-through-bean-seed-showing-relation-of-anthracnose-to-the-host-c-d-and-after-whetzel-g-cercospora-leaf-spot-a-isariopsis-griseola-leaf-5tot-rnj-ephor-quotmid-conidia-of-isariopsis-please-note-that-these-images-are-extracted-from-scanned-page-images-that-may-have-been-digitally-enhanced-for-readability-PG4CHW.jpg ". Diseases of truck crops and their control . Vegetables. Fig. 47. Bean Diseases. a. and fc. Rust on leaf and pods, c. section through bean leaf showing bean rust, summer spores, d. section through bean leaf, showing bean rust, winter spores, e. anthracnose, /. section through bean seed, showing relation of anthracnose to the host (c. d. and /. after Whetzel). g. Cercospora leaf spot, A. Isariopsis griseola leaf 5T»ot * ''r^nj/^-ephor^ ."Mid conidia of Isariopsis.. Please note that these images are extracted from scanned page images that may have been digitally enhanced for readability - Stock Photo")
RMPG4CHW–. Diseases of truck crops and their control . Vegetables. Fig. 47. Bean Diseases. a. and fc. Rust on leaf and pods, c. section through bean leaf showing bean rust, summer spores, d. section through bean leaf, showing bean rust, winter spores, e. anthracnose, /. section through bean seed, showing relation of anthracnose to the host (c. d. and /. after Whetzel). g. Cercospora leaf spot, A. Isariopsis griseola leaf 5T»ot * ''r^nj/^-ephor^ ."Mid conidia of Isariopsis.. Please note that these images are extracted from scanned page images that may have been digitally enhanced for readability -
RMRH8XFJ–. Botany for secondary schools; a guide to the knowledge of the vegetation of the neighborhood. Plants. 356. Section through a cluster-cup on barberry leaf.. Please note that these images are extracted from scanned page images that may have been digitally enhanced for readability - coloration and appearance of these illustrations may not perfectly resemble the original work.. Bailey, L. H. (Liberty Hyde), 1858-1954. New York, Macmillan
RMPG0GH8–. Diseases of greenhouse crops and their control . Vegetables; Plant diseases; Plant diseases. Fig. i8. Celery Disease. a. Septoria leaf spot, b. cross section through leaf to show relationship of fungus to its host, c. spores of Septoria petroselini {a-c after Coons),. Please note that these images are extracted from scanned page images that may have been digitally enhanced for readability - coloration and appearance of these illustrations may not perfectly resemble the original work.. Taubenhaus, Jacob Joseph, 1884-1937. New York : E. P. Dutton
RMREF4CK–. A compendium of general botany. Plants. Fig. 69 B.—Vertical section through the leaf, including the midrib, of Rapha- nus sativus. (After Haberlandt.). —P». Please note that these images are extracted from scanned page images that may have been digitally enhanced for readability - coloration and appearance of these illustrations may not perfectly resemble the original work.. Westermaier, Max; Schneider, Albert, 1863-1928. New York : Wiley
RMPG44R7–. A text-book of mycology and plant pathology . Plant diseases; Fungi in agriculture; Plant diseases; Fungi. Fig. 105.—Septoria leaf spot disease of celery, or celery blight. (After Coons, G. N., and Levin, Ezra, Spec. Bull. 77, Mich. Agric. Coll. Exper. Stat., March. 1916. 5P0BES . Fig. 106.—Section through leaf spot of celery blight {Septoria) showing hyphae) in leaf tissue and pycnidium with exuding pycnospores. (After Coons, G. H., and Levin, Ezra, Spec. Bull. 77. Mich. Agric. Coll. Exper. Stat., March, 1916.). Please note that these images are extracted from scanned page images that may h
RMRGMN18–. Bulletin - Massachusetts Agricultural Experiment Station. Agriculture -- Massachusetts. Section through normal tobacco leaf: (a) epidermis; (6) palisade cells; (c) parenchyma tissue.. Please note that these images are extracted from scanned page images that may have been digitally enhanced for readability - coloration and appearance of these illustrations may not perfectly resemble the original work.. Massachusetts Agricultural Experiment Station. Amherst, : Massachusetts Agricultural Experiment Station, 1907-1974
RMPG4CM3–. Diseases of truck crops and their control . Vegetables. Fig. 36, Turnip Diseases. a. and b. Anthracnose, c. cross section through acervulus, d. anthracnose spores, e. Cylindrosporium leaf spot, /. Phoma rot,- g. Sclerotinia rot (c. and d. after Higgins).. Please note that these images are extracted from scanned page images that may have been digitally enhanced for readability - coloration and appearance of these illustrations may not perfectly resemble the original work.. Taubenhaus, Jacob Joseph, 1884-1937. New York : E. P. Dutton & Co.
![. A compendium of general botany. Plants. TISSUES AND SIMPLE ORGANS. 125. Fig. 69 A.—Vertical section through the leaf of Sambucus nigra. " Arm- palisades." (After Haberlandt.). Please note that these images are extracted from scanned page images that may have been digitally enhanced for readability - coloration and appearance of these illustrations may not perfectly resemble the original work.. Westermaier, Max; Schneider, Albert, 1863-1928. New York : Wiley Stock Photo](https://c8.alamy.com/comp/REF4D9/a-compendium-of-general-botany-plants-tissues-and-simple-organs-125-fig-69-avertical-section-through-the-leaf-of-sambucus-nigra-quot-arm-palisadesquot-after-haberlandt-please-note-that-these-images-are-extracted-from-scanned-page-images-that-may-have-been-digitally-enhanced-for-readability-coloration-and-appearance-of-these-illustrations-may-not-perfectly-resemble-the-original-work-westermaier-max-schneider-albert-1863-1928-new-york-wiley-REF4D9.jpg ". A compendium of general botany. Plants. TISSUES AND SIMPLE ORGANS. 125. Fig. 69 A.—Vertical section through the leaf of Sambucus nigra. " Arm- palisades." (After Haberlandt.). Please note that these images are extracted from scanned page images that may have been digitally enhanced for readability - coloration and appearance of these illustrations may not perfectly resemble the original work.. Westermaier, Max; Schneider, Albert, 1863-1928. New York : Wiley Stock Photo")
RMREF4D9–. A compendium of general botany. Plants. TISSUES AND SIMPLE ORGANS. 125. Fig. 69 A.—Vertical section through the leaf of Sambucus nigra. " Arm- palisades." (After Haberlandt.). Please note that these images are extracted from scanned page images that may have been digitally enhanced for readability - coloration and appearance of these illustrations may not perfectly resemble the original work.. Westermaier, Max; Schneider, Albert, 1863-1928. New York : Wiley
![. Diseases of truck crops and their control . Vegetables. Fig. 23. Lettuce Diseases. a Germinating sclerotium of SderoHnia liberliana the'cause of lettuce drop, 6. section of fruiting cup (aoothecium) showing asci. ascospores and fiaraphyses of S. liberliana. c. section through sclerotium of A. /.â¢;.»w.-^«" J r-^-T-.-.-ating ascospore of 5. «Offnia?ia (.a. ':'. ,. r'-. â - - âvens), e. Cercospora leaf spot.. Please note that these images are extracted from scanned page images that may have been digitally enhanced for readability - coloration and appearance of these illustrations may n Stock Photo](https://c8.alamy.com/comp/PG4CT7/diseases-of-truck-crops-and-their-control-vegetables-fig-23-lettuce-diseases-a-germinating-sclerotium-of-sderohnia-liberliana-thecause-of-lettuce-drop-6-section-of-fruiting-cup-aoothecium-showing-asci-ascospores-and-fiaraphyses-of-s-liberliana-c-section-through-sclerotium-of-a-w-quot-j-r-t-ating-ascospore-of-5-offniaia-a-r-vens-e-cercospora-leaf-spot-please-note-that-these-images-are-extracted-from-scanned-page-images-that-may-have-been-digitally-enhanced-for-readability-coloration-and-appearance-of-these-illustrations-may-n-PG4CT7.jpg ". Diseases of truck crops and their control . Vegetables. Fig. 23. Lettuce Diseases. a Germinating sclerotium of SderoHnia liberliana the'cause of lettuce drop, 6. section of fruiting cup (aoothecium) showing asci. ascospores and fiaraphyses of S. liberliana. c. section through sclerotium of A. /.â¢;.»w.-^«" J r-^-T-.-.-ating ascospore of 5. «Offnia?ia (.a. ':'. ,. r'-. â - - âvens), e. Cercospora leaf spot.. Please note that these images are extracted from scanned page images that may have been digitally enhanced for readability - coloration and appearance of these illustrations may n Stock Photo")
RMPG4CT7–. Diseases of truck crops and their control . Vegetables. Fig. 23. Lettuce Diseases. a Germinating sclerotium of SderoHnia liberliana the'cause of lettuce drop, 6. section of fruiting cup (aoothecium) showing asci. ascospores and fiaraphyses of S. liberliana. c. section through sclerotium of A. /.â¢;.»w.-^«" J r-^-T-.-.-ating ascospore of 5. «Offnia?ia (.a. ':'. ,. r'-. â - - âvens), e. Cercospora leaf spot.. Please note that these images are extracted from scanned page images that may have been digitally enhanced for readability - coloration and appearance of these illustrations may n
RMRDP5K6–. Luther Burbank, his methods and discoveries and their practical application;. Plant breeding. miaixt A Section of Rainbow Corn Leaves This curious and beautiful variation in the foliage of the familiar maize was brought about by Mr. Burbank through bybridixation and careful selection; the original mutant with which he worked having been imported from Earope, Mr. Burbaak is now endeavoring to combine these beautiful qualities of leaf with correspondinglu attractive qualities of grain.. Please note that these images are extracted from scanned page images that may have been digitally enhanced f
![. Diseases of truck crops and their control . Vegetables. S.- '^^15"b«a%s^r". Fig. 66. Tomato Diseases. a. Septoria leaf spot, 6. section through a pycnidium of Sepioria lycopersici (after Levin), c. section through acervulus of Collelotrichum phomoides (after Venus Pool), d. and e. Melanconium rot, /. section through an acervulus of the Melan- conium fungus {d. to f. after Tisdale).. Please note that these images are extracted from scanned page images that may have been digitally enhanced for readability - coloration and appearance of these illustrations may not perfectly resemble Stock Photo](https://c8.alamy.com/comp/PG4CC1/diseases-of-truck-crops-and-their-control-vegetables-s-15quotbasrquot-fig-66-tomato-diseases-a-septoria-leaf-spot-6-section-through-a-pycnidium-of-sepioria-lycopersici-after-levin-c-section-through-acervulus-of-collelotrichum-phomoides-after-venus-pool-d-and-e-melanconium-rot-section-through-an-acervulus-of-the-melan-conium-fungus-d-to-f-after-tisdale-please-note-that-these-images-are-extracted-from-scanned-page-images-that-may-have-been-digitally-enhanced-for-readability-coloration-and-appearance-of-these-illustrations-may-not-perfectly-resemble-PG4CC1.jpg ". Diseases of truck crops and their control . Vegetables. S.- '^^15"b«a%s^r". Fig. 66. Tomato Diseases. a. Septoria leaf spot, 6. section through a pycnidium of Sepioria lycopersici (after Levin), c. section through acervulus of Collelotrichum phomoides (after Venus Pool), d. and e. Melanconium rot, /. section through an acervulus of the Melan- conium fungus {d. to f. after Tisdale).. Please note that these images are extracted from scanned page images that may have been digitally enhanced for readability - coloration and appearance of these illustrations may not perfectly resemble Stock Photo")
RMPG4CC1–. Diseases of truck crops and their control . Vegetables. S.- '^^15"b«a%s^r". Fig. 66. Tomato Diseases. a. Septoria leaf spot, 6. section through a pycnidium of Sepioria lycopersici (after Levin), c. section through acervulus of Collelotrichum phomoides (after Venus Pool), d. and e. Melanconium rot, /. section through an acervulus of the Melan- conium fungus {d. to f. after Tisdale).. Please note that these images are extracted from scanned page images that may have been digitally enhanced for readability - coloration and appearance of these illustrations may not perfectly resemble
RMREF869–. Comparative morphology of Fungi. Fungi. Fig. 143. -Chevalieropsis ctenotricha. Section through a dicotyledonous leaf with several conceptacles. (X 33; after Arnaud, 1921.) With Chevalieropsis, Parodiellina and Botryosphaeria, we have tempo- rarily finished with a special branch of the Myriangiales, which we shall meet later in the families of the Dothideales and Sphaeriales. Pseudosphaeriaceae.âAs the starting point of the last family of the Myriangiales to be discussed here, we must go back a few steps in the Dothioraceae to the stage of Bagnisiella and Dothiora. While the true Dothioraceae
RMPG46EM–. The fungi which cause plant disease . Plant diseases; Fungi. 246 THE FUNGI WHICH CAUSE PLANT DISEASE. FiQ. 180.—M. sentina, Septona stage. Portion of a section through a pear leaf spot, showing e, e, epidermis; p, pali- sade cells sp, spongy parenchyma; o, S. piricola pycnidium, giving out spores, b. After Longyear. M. sentina (Fr.) Schr. Perithecia, 80-110 /i; on dead spots of leaves, the long ostiole erumpent; asci clavate, 60-75 x 11-13 fi, colorless; spores fusiform, curved or straight, 26-33 x Conidia (=Septoria piricola) borne in pycnidia which are similar in size and form to the perit
RMRE1KNW–. Plant studies; an elementary botany. Botany. 40 PLANT STUDIES air chambers extends throughout the spongy mesophyll. It is into this system of air chambers that the stomata open, and so they are put into direct communication with the mesophyll or working cells. The peculiar arrangement of the upper mesophyll, to form the palisade tissue, has to do with the fact that that surface of the leaf is exposed to the direct rays of light. This light, so necessary to the mesophyll, is also dangerous for at least two reasons. If. St St Fig. 30. A section through the leaf of lily, showing upper epidermis
RMRFR8XK–. Carnegie Institution of Washington publication. THE ADULT SPOROPHYTE 95 leaf trace, but pass downward through the cortex separately, and even if it were possible to make a satisfactory series of the sections of the large rhizome the task of following the course of the very numerous individual bundles would be a difficult one. From free-hand sections of the large base of the leaf, however, one can see without difficulty the general plan of the vascular skeleton. The stout petiole is slightly contracted at its base, but a section presents very much the same appear- ance as one made higher up.
![. Timber and some of its diseases. Timber; Trees. XII.] PINE-BLISTER. 259 corticold). It is thus seen that the fungus Peri- dermium Pint was regarded as a parasite of pines, and that it possessed at least two varieties, one in- habiting the leaves and the other the cortex: the " varieties" were so considered, because certain differences were found in the minute structure of the. Fig. 39.—Vertical section through a very young Alcidhim of Peridermium Pint (var. acicola), with part of the subjacent tissue of the leaf, h, the mycelium of the parasitic fungus running between the cells of Stock Photo](https://c8.alamy.com/comp/RD8FNF/timber-and-some-of-its-diseases-timber-trees-xii-pine-blister-259-corticold-it-is-thus-seen-that-the-fungus-peri-dermium-pint-was-regarded-as-a-parasite-of-pines-and-that-it-possessed-at-least-two-varieties-one-in-habiting-the-leaves-and-the-other-the-cortex-the-quot-varietiesquot-were-so-considered-because-certain-differences-were-found-in-the-minute-structure-of-the-fig-39vertical-section-through-a-very-young-alcidhim-of-peridermium-pint-var-acicola-with-part-of-the-subjacent-tissue-of-the-leaf-h-the-mycelium-of-the-parasitic-fungus-running-between-the-cells-of-RD8FNF.jpg ". Timber and some of its diseases. Timber; Trees. XII.] PINE-BLISTER. 259 corticold). It is thus seen that the fungus Peri- dermium Pint was regarded as a parasite of pines, and that it possessed at least two varieties, one in- habiting the leaves and the other the cortex: the " varieties" were so considered, because certain differences were found in the minute structure of the. Fig. 39.—Vertical section through a very young Alcidhim of Peridermium Pint (var. acicola), with part of the subjacent tissue of the leaf, h, the mycelium of the parasitic fungus running between the cells of Stock Photo")
RMRD8FNF–. Timber and some of its diseases. Timber; Trees. XII.] PINE-BLISTER. 259 corticold). It is thus seen that the fungus Peri- dermium Pint was regarded as a parasite of pines, and that it possessed at least two varieties, one in- habiting the leaves and the other the cortex: the " varieties" were so considered, because certain differences were found in the minute structure of the. Fig. 39.—Vertical section through a very young Alcidhim of Peridermium Pint (var. acicola), with part of the subjacent tissue of the leaf, h, the mycelium of the parasitic fungus running between the cells of
RMRDHP0F–. Elements of plant biology. Plant physiology. ii6 THE GREEN PLANT CELL the intei-change of gases between it and the mesophyll cells, and equilibrium between it and the external air is constantly tending to be re-established by the diffusion of gases through the stomata, into or out of the leaf. Thus if the mesophyll cells absorb carbon dioxide, as they do when illuminated, the pressure of this gas decreases in the intercellular spaces and fresh carbon dioxide from the air streams in through the. Fig. 10.—Diagram of transverse section of a leaf to show the relation of the mesophyll {mes.) to &
RMRE2EKC–. Plant anatomy from the standpoint of the development and functions of the tissues, and handbook of micro-technic. Plant anatomy. 98 ABSORPTION OF WATER AND MINERALS and both are thickly beset with overlapping scales under which rain and dew gather and find entrance by osmosis into the cell cavities. Here the scales, like the velamen, serve both for the absorption, of water and protection against its loss. The scales when dry are shrunken and lie close against the stem or leaf; but when wet their thicker outer wall swells and bulges outward,. Fig. 47.—Cross section through a water-absorbing s
RMRDHK1X–. A textbook of botany for colleges and universities ... Botany. SAPROPHYTISM AND SYMBIOSIS 781 tural modification of a tissue or of an organ due to another organism.' Commonly the affected tissue is much enlarged, either through hyper-. FiG. 1089. — A cross section through the edge of a leaf gall of Viburnum Laniana, showing striking hyperplasy and hypertrophy; p, the palisade cells of the uninfected portion; p', the corresponding cells of the infected portion; /, the sponge cells of the uninfected portion; /', the corresponding cells of the infected portion; e, epidermis; li, epidermal hair;
RMRDWP9K–. An introduction to the structure and reproduction of plants. Plant anatomy; Plants. 304 EMBRYOLOGY prothallus. But, as soon as the root has become established in the soil, and the first leaf has spread out its lamina to the light, this dependence ceases, and soon after that the prothallus withers away (cf. Fig. 169, C). As compared with Bryophj'ta, the rela- tive importance of the two phases in the hfe-history is therefore reversed. The freediving sporophyte usually attains large dimen-. Fig. 169.—Embryology of the Fern. A, Longitudinal section through an archegonium, showing the octant-stag
![. The Canadian horticulturist [monthly], 1901. Gardening; Canadian periodicals. 264 THE CANADIAN HORTICULTURIST. lives through the winter on the underground stems, and while the spores may be killed with Bordeaux the vegetative portion is out of its reach. The accompanying engraving shows a section of an affected leaf, a a the epidermis of the lower side ruptured by it and exposing to view at b a mass of golden colored spores, each of which is capable of Technically we would describe the Kittat- inny for Ontario as follows : Origin—Kittatinny Mountains, N. J. ; found growing wild by a Mr. Wool Stock Photo](https://c8.alamy.com/comp/RFXCYF/the-canadian-horticulturist-monthly-1901-gardening-canadian-periodicals-264-the-canadian-horticulturist-lives-through-the-winter-on-the-underground-stems-and-while-the-spores-may-be-killed-with-bordeaux-the-vegetative-portion-is-out-of-its-reach-the-accompanying-engraving-shows-a-section-of-an-affected-leaf-a-a-the-epidermis-of-the-lower-side-ruptured-by-it-and-exposing-to-view-at-b-a-mass-of-golden-colored-spores-each-of-which-is-capable-of-technically-we-would-describe-the-kittat-inny-for-ontario-as-follows-originkittatinny-mountains-n-j-found-growing-wild-by-a-mr-wool-RFXCYF.jpg ". The Canadian horticulturist [monthly], 1901. Gardening; Canadian periodicals. 264 THE CANADIAN HORTICULTURIST. lives through the winter on the underground stems, and while the spores may be killed with Bordeaux the vegetative portion is out of its reach. The accompanying engraving shows a section of an affected leaf, a a the epidermis of the lower side ruptured by it and exposing to view at b a mass of golden colored spores, each of which is capable of Technically we would describe the Kittat- inny for Ontario as follows : Origin—Kittatinny Mountains, N. J. ; found growing wild by a Mr. Wool Stock Photo")
RMRFXCYF–. The Canadian horticulturist [monthly], 1901. Gardening; Canadian periodicals. 264 THE CANADIAN HORTICULTURIST. lives through the winter on the underground stems, and while the spores may be killed with Bordeaux the vegetative portion is out of its reach. The accompanying engraving shows a section of an affected leaf, a a the epidermis of the lower side ruptured by it and exposing to view at b a mass of golden colored spores, each of which is capable of Technically we would describe the Kittat- inny for Ontario as follows : Origin—Kittatinny Mountains, N. J. ; found growing wild by a Mr. Wool
RMRE0P2B–. Elementary botany. Botany. PERNS. 167 which is fastened to the middle of the under side of this shield, as seen in cross section in fig. 209. 348. Sporangia. —If we section through the leaf at one of the fruit dots, or if we tease off some of the sporangia so that the stalks are still attached, and examine them with the mi- croscope, we can see the form and structure of these peculiar bodies. Different views of a sporangium are shown in fig. 210. The slender portion is the stalk, and the larger part is the spore-case proper. AVe should examine the structure of this spore-case quite care- ful
RMRDYF34–. A textbook of botany for colleges and universities ... Botany. SPERMATOPHYTES 193 the stem from their emergence from the cylinder. These leaf traces curving about through the cortex are called girdles, and are conspicuous objects in any cross section of the stem (fig- 438). Leaves. â â âThe leaves are very large, pinnate, and generally leathery. The mesophyll is peculiar in containing cells elongated parallel with the leaf surface, and so loosely arranged as to appear like bridles of tissue traversing a large cavity. Strobilus. âThe strobili are dioecious, in striking contrast with those of
RMRD2F9P–. Elementary botany. Botany. FEFNS. 167 which is fastened to the middle of the under side of this shield, as seen in cross section in fig. 209. 348. Sporangia. —If we section through the leaf at one of the fruit dots, or if we tease off some of the sporangia so that the stalks are still attached, and examine them with the mi- croscope, we can see the form and structure of these peculiar bodies. Different views of a sporangium are shown in fig. 210. The slender portion is the stalk, and the larger part is the spore-case proper. We should examine the structure of this spore-case quite care- full
RMRDXNTE–. Botany of the living plant. Botany. 4i8 BOTANY OF THE LIVING PLANT The rapidity of the spread of the disease is one of its most surprising features. The fact that it habitually spreads down the prevailing wind indicates that it is due to wind-borne conidia. The conidiophores project through the stomata on the lower surface of the leaf and branch repeatedly (Fig. 353). The end of each branch may swell into an inverted pear-shaped conidium, which is constricted off from. Fig. 353. Section of Potato-leaf, in the tissues of which is the mycelum of Phyiophthora. The hyphae run between the cells a
RMRDYE7T–. A textbook of botany for colleges and universities ... Botany. 2 so MORPHOLOGY The branches of a root are formed at the periphery of the vascular cylinder and push through the cortex, this endogenous origin being in sharp contrast with the method of origin of stem branches (fig. 558). Leaf The structure of an angiosperm leaf is in every essential the same as that of a pteridoph3rte leaf, and should be clear at this point. For those. Fig. 559. — Transverse section of lily leaf: beginning above, the regions are the upper epidermis («); the palisade layer (p); the region of spongy tissue (exten
RMRDXT18–. A manual of poisonous plants, chiefly of eastern North America, with brief notes on economic and medicinal plants, and numerous illustrations. Poisonous plants. Fig. 83. Section through apothecium found on leaf; the asci, ascospores and mycelium. Combs.. Please note that these images are extracted from scanned page images that may have been digitally enhanced for readability - coloration and appearance of these illustrations may not perfectly resemble the original work.. Pammel, L. H. (Louis Hermann), 1862-1931. Cedar Rapids, Ia. , The Torch Press
RMRDYF0W–. Plant life and plant uses; an elementary textbook, a foundation for the study of agriculture, domestic science or college botany. Botany. FROM ROOT TO LEAF 83. - Cross section of corn stem showing the scat- tered arrangement of bundles. never become so large and strong as the stems of trees which have their wood in lay- ers. It is not an arrangement which is so well suited to great size and strength. The water as- cends through the xylem of the stems as readily as Fig. through the xylem of the roots. It becomes indistinguishable from the sap of the plant. It is the sap. It continues to move
RMRH8184–. Botany of the living plant. Botany. 4i8 BOTANY OF THE LIVING PLANT â The rapidity of the spread of the disease is one of its most surprising features. The fact that it habitually spreads down the prevailing wind indicates that it is due to wind-borne conidia. The conidiophores project through the stomata on the lower surface of the leaf and branch repeatedly (Fig. 353). The end of each branch may swell into an inverted pear-shaped conidiwn, which is constricted off from. Fig. 353- Section of Potato-leaf, in the tissues of which is the mycelum of Phytophthora. The hyphae run between the cells
RMRE2MMJ–. Elementary botany. Botany. FERNS. ^53 which is fastened to the middle of the under side of this shield, as seen in cross section in tig. 292. 532. Sporangia.—If we section through the leaf at one of the fruit dots, or if we tease off some of the sporangia so that the stalks are still attached, and examine them with the mi- croscope, we can see the form and structure of these peculiar bodies. Different views of a sporangium, are shown in fig. 293. The slender portion is the stalk, and the larger part is the spore-case proper. ''e should examine the structure of this spore-case cjuite care-
RMRE37EH–. Fundamentals of botany. Botany. 36 THE VEGETATIVE FUNCTIONS OF PLANTS converge at the base of the blade (Fig. 22). They may be traced from this point, through the petiole, into the branch. The veins are composed of fibers and vessels,. Fig. 28.—Horse-chestnut {Aesculus Hippocastanum). Is, leaf-scar, showing scars of seven fibro-vascular bundles, corresponding, in number, to the seven leaflets of the compound leaf, formerly attached at Is. The leaf is drawn to a smaller scale than the branch. closely associated, and are, therefore, calltA fihro-vascular bundles. A cross-section of the petiole
RMRDWFXB–. Elementary botany. Botany. FEKNS. 167 which is fastened to the middle of the under side of this shield, as seen in cross section in fig. 209. 348. Sporangia. —If we section through the leaf at one of the fruit dots, or if we tease off some of the sporangia so that the stalks are still attached, and examine them with the mi- croscope, we can see the form and structure of these peculiar bodies. Different views of a sporangium are shown in fig. 210. The slender portion is the stalk, and the larger part is the spore-case proper. We should examine the structure of this spore-case quite care- full
RMRDH6PA–. Pharmaceutical botany. Botany; Botany, Medical. 68 PHARMACEUTICAL BOTANY moving through the water are drawn by a chemotactic influence to the archegonia of another prothallus, pass down the neck canals of these and fuse with the ova, fertilizing them. The fertilized egg or. Fig. 37.—Dryopteris filix-mas—Plant and section through sorus. {From Sayre.) oospore divides and redivides and soon becomes differentiated into stem bud, first leaf, root, and foot. The foot obtains nourishment from the prothallus until the root grows into the soil, when it atrophies and the sporophyte becomes independent
![. Plant life in Alpine Switzerland; being an account in simple language of the natural history of Alpine plants. Mountain plants. 76 TYPICAL FLOWERS OF ALPINE PASTURES the little heaps or accumulations of calcium carbonate or chalk, which mark the position of the glands. "We have already shown (p. 10) that the leaves of all plants have numerous but very minute pores or openings, by which the atmosphere has free entrance into the substance of the leaf itself, and by which the gases evolved by the internal mechanism of the leaf pass back to the atmo-. Fio. VI.—Section through a Chalk-gland Stock Photo](https://c8.alamy.com/comp/RDTTFX/plant-life-in-alpine-switzerland-being-an-account-in-simple-language-of-the-natural-history-of-alpine-plants-mountain-plants-76-typical-flowers-of-alpine-pastures-the-little-heaps-or-accumulations-of-calcium-carbonate-or-chalk-which-mark-the-position-of-the-glands-quotwe-have-already-shown-p-10-that-the-leaves-of-all-plants-have-numerous-but-very-minute-pores-or-openings-by-which-the-atmosphere-has-free-entrance-into-the-substance-of-the-leaf-itself-and-by-which-the-gases-evolved-by-the-internal-mechanism-of-the-leaf-pass-back-to-the-atmo-fio-visection-through-a-chalk-gland-RDTTFX.jpg ". Plant life in Alpine Switzerland; being an account in simple language of the natural history of Alpine plants. Mountain plants. 76 TYPICAL FLOWERS OF ALPINE PASTURES the little heaps or accumulations of calcium carbonate or chalk, which mark the position of the glands. "We have already shown (p. 10) that the leaves of all plants have numerous but very minute pores or openings, by which the atmosphere has free entrance into the substance of the leaf itself, and by which the gases evolved by the internal mechanism of the leaf pass back to the atmo-. Fio. VI.—Section through a Chalk-gland Stock Photo")
RMRDTTFX–. Plant life in Alpine Switzerland; being an account in simple language of the natural history of Alpine plants. Mountain plants. 76 TYPICAL FLOWERS OF ALPINE PASTURES the little heaps or accumulations of calcium carbonate or chalk, which mark the position of the glands. "We have already shown (p. 10) that the leaves of all plants have numerous but very minute pores or openings, by which the atmosphere has free entrance into the substance of the leaf itself, and by which the gases evolved by the internal mechanism of the leaf pass back to the atmo-. Fio. VI.—Section through a Chalk-gland
RMREFF69–. Comparative anatomy of the vegetative organs of the phanerogams and ferns. Plant anatomy; Phanerogams; Ferns. PRIMAR}- ARRAXGEMEXT OF TISSUES. down, near to the middle of the stem, and close to that of the next lower leaf, through one internode, and then unites with the latter in the node (comp. Fig. 124). In a transverse section of the internode there are accordingly two bundles of the leaf- trace, which are close to the centre in the diameter between the median lines of the two rows of leaves. A small vertical cauline bundle appears at a later stage than the leaf-traces and near to them, a
RMRH93FY–. Botany for high schools. Botany. 282 GENERAL MORPHOLOGY OF PLANTS 448. The red rust of wheat (uredo stage). — The aecidio- spores from the cluster cup on the barberry are carried by the wind. Fig. 249. Section through leaf of barberry at point affected with the cluster-cup stage of the wheat rust; spermogonia above, aecidia below. (After Marshall-Ward.) to the wheat (also to the other cereals and some grasses). Here they germinate and the mycelium enters at a stomate and pro- duces the intercellular mycelium. At certain points under the. Please note that these images are extracted from scann
. Between the fourth and fifth leaf traces is present a section of the first mucilage duct. 5 is a section some distance to one side of the apex, also passing through the primary mucilage canal and the fourth root, which arises between the fourth and fifth leaf traces. Figures C and D are sections on opposite sides of the stem apex from B. The fourth leaf, wit Stock Photo")
RMRE1RHA–. The Eusporangiatae; the comparative morphology of the Ophioglossaceae and Marattiaceae. Ophioglossaceae; Marattiaceae. 170 THE MARATTIALES of the third leaf trace, and at this point there may be seen the base of the third root (r"). Between the fourth and fifth leaf traces is present a section of the first mucilage duct. 5 is a section some distance to one side of the apex, also passing through the primary mucilage canal and the fourth root, which arises between the fourth and fifth leaf traces. Figures C and D are sections on opposite sides of the stem apex from B. The fourth leaf, wit
![. Comparative anatomy of the vegetative organs of the phanerogams and ferns;. Plant anatomy; Ferns. 376 PRIMARY ARRANGEMENT OF TISSUES. lateral bundles." The leaf-trace is here much contracted, and usually forms by coalescence one single mass. The six bundles of one pair of leaves thus go through only two internodes before they coalesce with lower ones, and the transverse section through an internode shows twelve bundles (Fig. 127), of which six pass out at the next node and six at the node above it. These twelve bundles would be arranged in a circle if they had a radially perpendicular c Stock Photo](https://c8.alamy.com/comp/RE3K93/comparative-anatomy-of-the-vegetative-organs-of-the-phanerogams-and-ferns-plant-anatomy-ferns-376-primary-arrangement-of-tissues-lateral-bundlesquot-the-leaf-trace-is-here-much-contracted-and-usually-forms-by-coalescence-one-single-mass-the-six-bundles-of-one-pair-of-leaves-thus-go-through-only-two-internodes-before-they-coalesce-with-lower-ones-and-the-transverse-section-through-an-internode-shows-twelve-bundles-fig-127-of-which-six-pass-out-at-the-next-node-and-six-at-the-node-above-it-these-twelve-bundles-would-be-arranged-in-a-circle-if-they-had-a-radially-perpendicular-c-RE3K93.jpg ". Comparative anatomy of the vegetative organs of the phanerogams and ferns;. Plant anatomy; Ferns. 376 PRIMARY ARRANGEMENT OF TISSUES. lateral bundles." The leaf-trace is here much contracted, and usually forms by coalescence one single mass. The six bundles of one pair of leaves thus go through only two internodes before they coalesce with lower ones, and the transverse section through an internode shows twelve bundles (Fig. 127), of which six pass out at the next node and six at the node above it. These twelve bundles would be arranged in a circle if they had a radially perpendicular c Stock Photo")
RMRE3K93–. Comparative anatomy of the vegetative organs of the phanerogams and ferns;. Plant anatomy; Ferns. 376 PRIMARY ARRANGEMENT OF TISSUES. lateral bundles." The leaf-trace is here much contracted, and usually forms by coalescence one single mass. The six bundles of one pair of leaves thus go through only two internodes before they coalesce with lower ones, and the transverse section through an internode shows twelve bundles (Fig. 127), of which six pass out at the next node and six at the node above it. These twelve bundles would be arranged in a circle if they had a radially perpendicular c
![. Plant studies; an elementary botany. Botany. Fig. 32. Section through a jicjrtion of the leaf of the yeS' (Tunis), showing cuticle (ci, epidermis (t), ami the u]i])er portifin of the palisade cells (p). form two or three layers,, we might infer the probability of exposure to intense light or drought. The accompanying illustration (Fig. 31) shows in a striking way the efEect of light intensity upon the structure of the mesophyll, by contrasting leaves of the same jilant exposed to the extreme conditions of light and shade. The most usual structurtil adaptations, however, are connected with t Stock Photo](https://c8.alamy.com/comp/RDGWXE/plant-studies-an-elementary-botany-botany-fig-32-section-through-a-jicjrtion-of-the-leaf-of-the-yes-tunis-showing-cuticle-ci-epidermis-t-ami-the-u-i-er-portifin-of-the-palisade-cells-p-form-two-or-three-layers-we-might-infer-the-probability-of-exposure-to-intense-light-or-drought-the-accompanying-illustration-fig-31-shows-in-a-striking-way-the-efeect-of-light-intensity-upon-the-structure-of-the-mesophyll-by-contrasting-leaves-of-the-same-jilant-exposed-to-the-extreme-conditions-of-light-and-shade-the-most-usual-structurtil-adaptations-however-are-connected-with-t-RDGWXE.jpg ". Plant studies; an elementary botany. Botany. Fig. 32. Section through a jicjrtion of the leaf of the yeS' (Tunis), showing cuticle (ci, epidermis (t), ami the u]i])er portifin of the palisade cells (p). form two or three layers,, we might infer the probability of exposure to intense light or drought. The accompanying illustration (Fig. 31) shows in a striking way the efEect of light intensity upon the structure of the mesophyll, by contrasting leaves of the same jilant exposed to the extreme conditions of light and shade. The most usual structurtil adaptations, however, are connected with t Stock Photo")
RMRDGWXE–. Plant studies; an elementary botany. Botany. Fig. 32. Section through a jicjrtion of the leaf of the yeS' (Tunis), showing cuticle (ci, epidermis (t), ami the u]i])er portifin of the palisade cells (p). form two or three layers,, we might infer the probability of exposure to intense light or drought. The accompanying illustration (Fig. 31) shows in a striking way the efEect of light intensity upon the structure of the mesophyll, by contrasting leaves of the same jilant exposed to the extreme conditions of light and shade. The most usual structurtil adaptations, however, are connected with t
![. A handbook of cryptogamic botany. Cryptogams. MUSCI 153 thickenings and circular orifices, similar to those of the leaves. These serve as capillary tubes, through which the water of the bogs in which these mosses grow is raised, and the whole plant is in consequence always saturated with water like a sponge.. Fig. 127.—A, portion of surface of leaf of .5". acutifolimn, cl, small chlorophyllous cells ; f, large empty cells ; /, orifices in these cells. B^ transverse section (magnified).. Please note that these images are extracted from scanned page images that may have been digitally enh Stock Photo](https://c8.alamy.com/comp/RE3MFB/a-handbook-of-cryptogamic-botany-cryptogams-musci-153-thickenings-and-circular-orifices-similar-to-those-of-the-leaves-these-serve-as-capillary-tubes-through-which-the-water-of-the-bogs-in-which-these-mosses-grow-is-raised-and-the-whole-plant-is-in-consequence-always-saturated-with-water-like-a-sponge-fig-127a-portion-of-surface-of-leaf-of-5quot-acutifolimn-cl-small-chlorophyllous-cells-f-large-empty-cells-orifices-in-these-cells-b-transverse-section-magnified-please-note-that-these-images-are-extracted-from-scanned-page-images-that-may-have-been-digitally-enh-RE3MFB.jpg ". A handbook of cryptogamic botany. Cryptogams. MUSCI 153 thickenings and circular orifices, similar to those of the leaves. These serve as capillary tubes, through which the water of the bogs in which these mosses grow is raised, and the whole plant is in consequence always saturated with water like a sponge.. Fig. 127.—A, portion of surface of leaf of .5". acutifolimn, cl, small chlorophyllous cells ; f, large empty cells ; /, orifices in these cells. B^ transverse section (magnified).. Please note that these images are extracted from scanned page images that may have been digitally enh Stock Photo")
RMRE3MFB–. A handbook of cryptogamic botany. Cryptogams. MUSCI 153 thickenings and circular orifices, similar to those of the leaves. These serve as capillary tubes, through which the water of the bogs in which these mosses grow is raised, and the whole plant is in consequence always saturated with water like a sponge.. Fig. 127.—A, portion of surface of leaf of .5". acutifolimn, cl, small chlorophyllous cells ; f, large empty cells ; /, orifices in these cells. B^ transverse section (magnified).. Please note that these images are extracted from scanned page images that may have been digitally enh
![. A handbook of cryptogamic botany. Cryptogams. Fig. 23.—Transverse section through leaf of 6". incequaV/olia. ch, chlorophyll-bodies ; co, upper epiderm ; eit, lower epiderm ; j/, stomates ; /, -air-cavity surrounding vascular bundle and traversed by trabecules. (After Goebel, magnified.). Fig, 24.—Transverse section of stem of 5". deniiculata Lk. ^, air-cavity surrounding * vascular' bundle. (After Goebel, magnified.) thin-walled phloem. The primary elements of the xylem, very narrow spiral tracheides, are formed at the angles of the bundle, and from them. Please note that these im Stock Photo](https://c8.alamy.com/comp/RE3N9X/a-handbook-of-cryptogamic-botany-cryptogams-fig-23transverse-section-through-leaf-of-6quot-incequavolia-ch-chlorophyll-bodies-co-upper-epiderm-eit-lower-epiderm-j-stomates-air-cavity-surrounding-vascular-bundle-and-traversed-by-trabecules-after-goebel-magnified-fig-24transverse-section-of-stem-of-5quot-deniiculata-lk-air-cavity-surrounding-vascular-bundle-after-goebel-magnified-thin-walled-phloem-the-primary-elements-of-the-xylem-very-narrow-spiral-tracheides-are-formed-at-the-angles-of-the-bundle-and-from-them-please-note-that-these-im-RE3N9X.jpg ". A handbook of cryptogamic botany. Cryptogams. Fig. 23.—Transverse section through leaf of 6". incequaV/olia. ch, chlorophyll-bodies ; co, upper epiderm ; eit, lower epiderm ; j/, stomates ; /, -air-cavity surrounding vascular bundle and traversed by trabecules. (After Goebel, magnified.). Fig, 24.—Transverse section of stem of 5". deniiculata Lk. ^, air-cavity surrounding * vascular' bundle. (After Goebel, magnified.) thin-walled phloem. The primary elements of the xylem, very narrow spiral tracheides, are formed at the angles of the bundle, and from them. Please note that these im Stock Photo")
RMRE3N9X–. A handbook of cryptogamic botany. Cryptogams. Fig. 23.—Transverse section through leaf of 6". incequaV/olia. ch, chlorophyll-bodies ; co, upper epiderm ; eit, lower epiderm ; j/, stomates ; /, -air-cavity surrounding vascular bundle and traversed by trabecules. (After Goebel, magnified.). Fig, 24.—Transverse section of stem of 5". deniiculata Lk. ^, air-cavity surrounding * vascular' bundle. (After Goebel, magnified.) thin-walled phloem. The primary elements of the xylem, very narrow spiral tracheides, are formed at the angles of the bundle, and from them. Please note that these im
RMRDEABE–. Comparative morphology and biology of the fungi, mycetozoa and bacteria . Plant morphology; Fungi; Myxomycetes; Bacteriology. Fig. 130. chrysomyxa Rhododendri in a leaf of Rh. hirsutttm. Vertical section through a teleutospore-layer. e—€ epidermis of the under surface of the leaf. Adjoining the spores is the tissue of the leaf traversed and distorted by mycelial filaments m of Chrysomyxa; a a row of teleutospores which have not yet germinated; / a similar row in which the uppermost teleutospore has formed a promycelium, and on this sterigmata and sporidia are beginning to be formed in basipe
RMRDFDG6–. Fossil plants : for students of botany and geology . Paleobotany. 404 BENNETTITALES [CH. I-. Fig. 528. Cycadeoidea dacotensis. Longitudinal section through a bisporangiate strobilus; s, folded microsporophylls with synangia; o, receptacle bearing short megasporophylls and interseminal scales; a, eroded surface of bracts- /', ramenta between the bracts and leaf-bases; I, leaf-base; c, cortex of stem- (, Tascular cylinder of peduncle. (After Wieland; nat. size.). Please note that these images are extracted from scanned page images that may have been digitally enhanced for readability - colorat
RMRPXK52–. Text-book of botany, morphological and physiological. Botany. 432 VASCULAR CRYPTOGAMS, apparently extend over many years (see Braun, 'Rejuvenescence/ p. 123). Ac- cording to Mettenius, the lamina of some Hymenophyllaceae is capable of unlimited development, and is annually renewed. In Lygodium the primary branches of the lamina remain also in a bud-like condition at the end after the formation of each pair of pinnae of the second order, while the rachis of the leaf grows without limit and resembles a twining stem.. FIG. 302.—Aspidiwm Filix-mas; A longitudinal section through the end of a ste
RMRH92J2–. Botany for agricultural students. Plants. BLACK lU'ST OK ({RAIX (PUCCINIA (iUAMIMS) 399. Fig. 356. — Stage of the Wheat Rust on the Barberry bush, Bcrbcris vulgaris. Left, leaf of Barberry, showing the affected areas which are red- dish, much thickened, and contain many cup-Uke depressions; right, a very much enlarged section through the affected area of the leaf, showing one of the cups (c) with chains of aecidiospores (X 200). The very small spores at (p) are the spermatia or pycniospores.. Please note that these images are extracted from scanned page images that may have been digitally en
RMRGWMHA–. Bulletin. 1901-13. Agriculture; Agriculture. Fig. 1.-Cross Section Through a Vein of a Beet Leaf Affected with Curly-Top. r^Tr?. Fig. 2—Cross Section Through a Vein of a Healthy Beet Leaf.. Please note that these images are extracted from scanned page images that may have been digitally enhanced for readability - coloration and appearance of these illustrations may not perfectly resemble the original work.. United States. Bureau of Plant Industry, Soils, and Agricultural Engineering. Washington Govt. Print. Off
![. Fossil plants : for students of botany and geology . Paleobotany. ^XXII] CYCADOXYLON 185 of a trace. In its passage through the cortex a leaf-trace divides repeatedly, the secondary xylem on the outer face of each strand being retained for a considerable time. Our meagre knowledge of the nature of the leaves is based •on incomplete fragments found in association with the stem. The leaf is believed to have been simple and characterised by a thick lamina with a hypodermal zone of sclerous strands and several vascular bundles.. Fig. 452. Stenomydon tuedianum. Transverse section of stele. (After Stock Photo](https://c8.alamy.com/comp/RDFDRN/fossil-plants-for-students-of-botany-and-geology-paleobotany-xxii-cycadoxylon-185-of-a-trace-in-its-passage-through-the-cortex-a-leaf-trace-divides-repeatedly-the-secondary-xylem-on-the-outer-face-of-each-strand-being-retained-for-a-considerable-time-our-meagre-knowledge-of-the-nature-of-the-leaves-is-based-on-incomplete-fragments-found-in-association-with-the-stem-the-leaf-is-believed-to-have-been-simple-and-characterised-by-a-thick-lamina-with-a-hypodermal-zone-of-sclerous-strands-and-several-vascular-bundles-fig-452-stenomydon-tuedianum-transverse-section-of-stele-after-RDFDRN.jpg ". Fossil plants : for students of botany and geology . Paleobotany. ^XXII] CYCADOXYLON 185 of a trace. In its passage through the cortex a leaf-trace divides repeatedly, the secondary xylem on the outer face of each strand being retained for a considerable time. Our meagre knowledge of the nature of the leaves is based •on incomplete fragments found in association with the stem. The leaf is believed to have been simple and characterised by a thick lamina with a hypodermal zone of sclerous strands and several vascular bundles.. Fig. 452. Stenomydon tuedianum. Transverse section of stele. (After Stock Photo")
RMRDFDRN–. Fossil plants : for students of botany and geology . Paleobotany. ^XXII] CYCADOXYLON 185 of a trace. In its passage through the cortex a leaf-trace divides repeatedly, the secondary xylem on the outer face of each strand being retained for a considerable time. Our meagre knowledge of the nature of the leaves is based •on incomplete fragments found in association with the stem. The leaf is believed to have been simple and characterised by a thick lamina with a hypodermal zone of sclerous strands and several vascular bundles.. Fig. 452. Stenomydon tuedianum. Transverse section of stele. (After
RMRDNECT–. The natural history of plants, their forms, growth, reproduction, and distribution;. Botany. Fig. 85.—Folding of Grass-leaves. 1 Vertical section through an open leaf of the thin-leaved Moor-grass (Sesleria Unuifolia). 2 Vertical section through a closed leaf; X40. a Portion from the centre of an open leaf; X300. extent, those in the neighbourhood of the approximated margins in a lesser degree (see fig. 882). Since the stomata lie on the sides of the ridges, it is obvious that transpiration is checked to the utmost by the closing and consequent approximation of the opposite sides of each gro
Search Results for Section through a leaf Stock Photos and Images (736)
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