. The fungi which cause plant disease . Plant diseases; Fungi. THE FUNGI WHICH CAUSE PLANT DISEASE 217 Spores hyaline Spores 1-celled 16. Scirrhiella. Spores 2-celled 17. Scirrhia. Spores 4 to 8-celled, fusiform. .. 18. Monographus. Spores colored, multicellular, fusi- form 19. Rhopographus. Stromata sunken, permanently united to the epidermis and substratum Spores 1-celled 20. Phyllachora, p. 220. Spores 2-celled Spores of similar cells 21. Dothidella, p. 221. Spores of dissimilar cells 22. MunMella. Stromata from the first superficial Stromata encrusted, widely spreading... 23. Hyalodothis.

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. The fungi which cause plant disease . Plant diseases; Fungi. THE FUNGI WHICH CAUSE PLANT DISEASE 217 Spores hyaline Spores 1-celled 16. Scirrhiella. Spores 2-celled 17. Scirrhia. Spores 4 to 8-celled, fusiform. .. 18. Monographus. Spores colored, multicellular, fusi- form 19. Rhopographus. Stromata sunken, permanently united to the epidermis and substratum Spores 1-celled 20. Phyllachora, p. 220. Spores 2-celled Spores of similar cells 21. Dothidella, p. 221. Spores of dissimilar cells 22. MunMella. Stromata from the first superficial Stromata encrusted, widely spreading... 23. Hyalodothis. Stromata cushion-shaped, limited 24. Schweinitziella. Of these genera only five are of interest as plant pathogens. The majority contain only saprophytes. Diachora Muller (p. 216) The genus is easily recognized by its peculiarity of bearing asci only as an equatorial band instead of -^ -_ on the floor of the perithecia, a char- * ' acter unique among the Pyrenomy- cetes. D. onobiychidis (D. C.) Miill. is reported as causing black spots on leaves of sainfoin and Lathyrus in Europe.. Plowrightia Saccardo (p. 216) Stromata formed within the tissues of the host plant, erumpent, tuber- cular or cushion-shaped, depressed or elevated, smooth, later frequently wrinkled, white within; asci cylindric, 8-spored; spores ovate, 2-celled, hyaline or light green; conidial forms Cladosporium, Dematium, etc. Fio. 154.—D. onobrychidis. E, co- nidial stage; F, ascocarp and asci. After Muller.. 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.. Stevens, Frank Lincoln, 1871-1934. New York : Macmillan