. The fungi which cause plant disease . Plant diseases; Fungi. 458 THE FUNGI WHICH CAUSE PLANT DISEASE C. parasitica Wil.^"^ Growing in dense clusters; pileus 6-8 cm., convex or umbonate, usually minutely scaly, mottled buff to yellow-brown in color; gills paler, becoming mottled, at first noticeably decurrent; stipe 10-16 cm. high, up to 1 cm. thick, solid, usually curved, darker than the pileus; black rhizomorphs present. It differs from Armillaria mellea in having no annulus, and in growing in denser clus- ters. The fungus causes a root- rot very similar to that caused by Armillaria me
. The fungi which cause plant disease . Plant diseases; Fungi. 458 THE FUNGI WHICH CAUSE PLANT DISEASE C. parasitica Wil.^"^ Growing in dense clusters; pileus 6-8 cm., convex or umbonate, usually minutely scaly, mottled buff to yellow-brown in color; gills paler, becoming mottled, at first noticeably decurrent; stipe 10-16 cm. high, up to 1 cm. thick, solid, usually curved, darker than the pileus; black rhizomorphs present. It differs from Armillaria mellea in having no annulus, and in growing in denser clus- ters. The fungus causes a root- rot very similar to that caused by Armillaria mellea. There are present typical subcortical strands, mostly between the cortex and cambium and some- subterranean black rhizomorphs adhering. Fig. 320.—Rhizomorphs of A. mellea After Freeman. times characteristic close to the cortex of the roots. Fungous branches enter the wood chiefly through the medullary rays and there is later rapid vertical growth through the vessels and tracheids. The cell contents are destroyed, the hj^jhse often forming loops around the nucleus. The sporophores occur in groups at the base of the tree after the disease is well developed. An extensive bibliography is given by Wilcox. ^"^ Collybia Fries (p. 450) Pileus thin, fleshy, margin at first incurved; stipe cartilaginous. About two hundred seventy-five species. Fig. 329. C. velutipes Curt. Cap 2-8 cm. wide, yellow-brown or reddish bro\\Ti, rarely paler except toward the margin, smooth, very sticky when moist, con- vex to plane or somewhat recurved, often excentric or irregular through 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
