. A popular history of British lichens [microform] : comprising an account of their structure, reproduction, uses, distribution, and classification. Lichens; Lichens. 'omimmm 180 rOPULAR HISTORY OF LICHENS. 5. IJmbttjcauta erosa {emlo, to eat into, or perforate) is distinguished bj the reticulate-cribrose character of the thallus, which is bronze-coh)ured,—below ociiroleucous or brownish and papillose. Apothecia innate, then appressed, otherwise resembling those of preceding species. Spermo- gones frequently abundant, but not easily seen, from having the same colour as the thallus; they are sm

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. A popular history of British lichens [microform] : comprising an account of their structure, reproduction, uses, distribution, and classification. Lichens; Lichens. 'omimmm 180 rOPULAR HISTORY OF LICHENS. 5. IJmbttjcauta erosa {emlo, to eat into, or perforate) is distinguished bj the reticulate-cribrose character of the thallus, which is bronze-coh)ured, —below ociiroleucous or brownish and papillose. Apothecia innate, then appressed, otherwise resembling those of preceding species. Spermo- gones frequently abundant, but not easily seen, from having the same colour as the thallus; they are small, prominent, obtuse tubercles, with an imperceptible pore or ostiole; their structure and contents resemble those of U. vellea. This is somewhat rarer than the preceding species, but occurs in similar localities. 6. Umbtlicaria POLYRRHizos {pi^a, a root) is chiefly dis- tinguished by the fibrillose-pannose character of the black under-surface of thallus, and by the apothecia being de- pressed, tumid, devoid of a margin, and marked by lirellse radiating from the centre to the circumference. Its habitat is similar to that of preceding species; it is not uncommon in the Highlands, and on the border-hills. All the Umbilicarias when moistened are of a more or less deep green or olive-green colour, becoming greyish, bronze- coloured, or blackish in the herbarium. With the marked difference in colour between the natural and dried state, every botanist is familiar who has collected these leathery. 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.. Lindsay, W. Lauder, (William Lauder), 1829-1880. London : L. Reeve