674 COBTICIUM 



slightly thickened walls, 2-4-5/t in diam." Bourd. & Galz. Dead 

 wood, and fallen branches. Oct. April. Not uncommon, (v.v.) 



2285. C. bombycinum (Sommerf.) Bres. Trans. Brit. Myc. Soc. vi, 

 text-figs, p. 139. Bombycinum, silky. 



R. 2-5 cm., white, then cream colour, or pale alutaceous, effused, 

 separable, smooth, or slightly rough; margin pubescent, floccose, 

 rarely fibrillose. Hymenium concolorous, smooth, or rough, pulveru- 

 lent under a lens. Flesh membranaceous, fairly thick, floccose. Spores 

 white, broadly elliptical, or ovate, somewhat irregular, 9-12 x G-Sfi, 

 1-guttulate; basidia cylindrical, 21-34-45 x 4-6-9 p, with 2^-sterig- 

 mata, 6-8/u, long. Hyphae rather thick walled', 4-6/x in diam., 

 branched, frequently septate, with clamp connections. Trunks of 

 living pollarded willows. Oct. Jan. Uncommon, (v.v.) 



2286. C. vellereum Ellis & Cragin. (= Corticium chlamydosporium 

 Burt; Corticium Bresadolae Bourd.) Vellereum, woolly. 



R. 2-10 cm., white, cream, or tinged buff pink, widely effused, ad- 

 nate; margin white, silky, radiating. Hymenium waxy-white, cream, 

 or tinged buff pink, not changing when dried, smooth, pulverulent. 

 Flesh concolorous, or pale, waxy, floccose, loose, thick. Spores white, 

 subglobose, or broadly elliptical, apiculate at the base, 5-6 x 5p, 

 or 5-9 x 5-7-5/i, 1-guttulate; basidia 18-30-54 x 5-7-5/n, with 2-4 

 curved sterigmata, 3-5 /u, long. Basal hyphae very loosely interwoven, 

 sparingly branched, thin walled, 2-7 ft in diam., with clamp con- 

 nections. On bark, and felled elm trunks. Nov. Feb. Not un- 

 common, (v.v.) 



2. Receptacle fleshy-membranaceous, then rigid and fragile, thick, 

 often reflexed, and Stereum-like. Hymenium tuberculose and 

 radially crested. 



2287. C. subcostatum (Karst.) Bourd. & Galz. (= Stereum subcostatum 

 Karst. ; Radulum pendulum Fr. sec. Bourd. & Galz.) Quel. Ass. 

 Fr. (1882), t. xi, fig. 16, as Stereum album Quel. 



Sub, somewhat; costatum, ribbed. 



R. 3-12 cm., cream, or cream chamois colour, resupinate, or reflexed, 

 villose, or strigose on the outside; margin torn, fibrillose, or ciliate. 

 Hymenium concolorous, becoming chamois, pinkish, or reddish when 

 dried, tubercular in the centre, radially rugose, and wrinkled towards 

 the margin, finally deeply cracked. Flesh white, fleshy membrana- 

 ceous, then firm, fibrillose, brittle. Spores white, "oblong sub- 

 cylindric, slightly depressed on the side, 56-8-5 x 2-75-4ft, contents 

 homogeneous; basidia 12-25-45 x 3-4- 7 ft, with 2-4 straight sterig- 

 mata, 4-4-5/x long. Hyphae thin walled, 2-4ju in diam., with clamp 

 connections" Bourd. & Galz. Dead branches of alder, birch, and pine. 

 Oct. Jan. Uncommon, (v.v.) 



