. The fungi which cause plant disease . Plant diseases; Fungi. THE FUNGI WHICH CAUSE PLANT DISEASE 315 Sori rather permanently embedded in tissues Spore-balls without sterile cortex Spore-balls consisting entirely of dark-colored spores 6. Tuburcinia. Spore-balls consisting of light-colored spores Spore-balls with or without central sterile cells 7. Burrillia. Spore-balls with central network of filaments S. Tracya. Spore-balls with sterile cortex 9. Doassansia, p. 322. Neovossia occurs on Phragmites; Tuburcinia on Convallariacese, Primula, Trientalis and Geranium in Russia; Burrillia on Limna
. The fungi which cause plant disease . Plant diseases; Fungi. THE FUNGI WHICH CAUSE PLANT DISEASE 315 Sori rather permanently embedded in tissues Spore-balls without sterile cortex Spore-balls consisting entirely of dark-colored spores 6. Tuburcinia. Spore-balls consisting of light-colored spores Spore-balls with or without central sterile cells 7. Burrillia. Spore-balls with central network of filaments S. Tracya. Spore-balls with sterile cortex 9. Doassansia, p. 322. Neovossia occurs on Phragmites; Tuburcinia on Convallariacese, Primula, Trientalis and Geranium in Russia; Burrillia on Limnan- themum, Echinodorus and Sagittaria; Tracya on Spirodela. TiUetia Tulasne i"'" (p. 314) Sori in various parts of the hosts, usually in the ovaries, forming dusty spore-masses; spores single and usually formed singly in the ends of the mycelial threads which disappear more or less completely through gelatiniza- tion, germination usually by a short promycelium wliich bears a terminal cluster of elongate sporidia that in nutrient solu- tions, with or without fusing in pairs, may give rise to a con- siderable mycelium bearing sec- ondary air-sporidia. The genus closely resembles Ustilago except in its larger Fig. 230.—t. spores and mode of germination. Twenty-two American species are listed by Clinton. Only three are of economic importance. T. pancicii Bub. & Ran. is reported on barley heads in Servia.^' T. glomerulata. Cocc. & Mor. is a doubtful species on fcetens, spores. Photo- micrograph. After 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 Stevens, Frank Lincoln, 1871-1934. New York : Macmillan
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Keywords: ., bookcentury1900, bookdecade1910, booksubjectfungi, bookyear1913
