. The fungi which cause plant disease . Plant diseases; Fungi. 436 THE FUNGI WHICH CAUSE PLANT DISEASE It occurs on oak and maple '° as a wound parasite, destroying bark and cambium. This and related species are usually saprophytic. F. pinicola (Fr.) Cke.«^ Pileus corky to woody, ungulate, 8-15 x 12-40 x 6-10 cm.; surface glabrous, sulcate, reddish-b^o^vn to gray or black, often resinous; margin at first acute to tumid, palUd, becoming yellowish or reddish-chestnut: context woody, pallid, cm. thick; tubes distinctly stratified, 3-5 mm. long each season, white to isabelline,. Fig. 310.—Fo
. The fungi which cause plant disease . Plant diseases; Fungi. 436 THE FUNGI WHICH CAUSE PLANT DISEASE It occurs on oak and maple '° as a wound parasite, destroying bark and cambium. This and related species are usually saprophytic. F. pinicola (Fr.) Cke.«^ Pileus corky to woody, ungulate, 8-15 x 12-40 x 6-10 cm.; surface glabrous, sulcate, reddish-b^o^vn to gray or black, often resinous; margin at first acute to tumid, palUd, becoming yellowish or reddish-chestnut: context woody, pallid, cm. thick; tubes distinctly stratified, 3-5 mm. long each season, white to isabelline,. Fig. 310.—Fomes applanatus. After Clements. mouths circular, 3-5 to a mm., edges obtuse, white to cream-colored; spores ovoid, smooth, hyaline, 6 /x; hyphse 8 m; cystidia none. It occurs on conifers; pine, hemlock, spruce, balsam, larch, etc., more rarely on beech, birch and maple, as a wound parasite of the heart wood. The sporophores are often absent until after death of the host. The tracheids bear many holes. The wood carbonizes, the cellulose is destroyed and sheets of mycelium form, particularly within the space occupied by the medullary rays and * 96 329 • V */ in tangential crevices. ' Fig. 309. F. applanatus (Pers.) Wallr. Pileus hard, woody, dimidiate, applanate, 6-15 x 8-30 x 1-4 cm.; surface milk-white to gray or umbrinous, glabrous, concentrically sulcate, encrusted, fasciate with obscure lines, condia-bearing,. 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
