676 CORTICITJM 



with clamp connections. Conifer wood, cones, and on birch. Sept. 

 March. Uncommon. 



2292. C. arachnoideum Berk. (= Corticium centrifugum (Lev.) Bres.) 



apd'xvriy a spider's web; eZo9, like. 



R. 2-18 cm.>, white, greenish white, or greyish, effused, subadnate, 

 arachnoid, more rarely continuous; margin delicately byssoid or 

 arachnoid. Hymenium concolorous, loose, rarely continuous. Flesh 

 concolorous, floccose, very thin. Spores white, oblong, obliquely apicu- 

 late at the base, 5-7 x 3-4 p, "often cohering in 2-4; basidia clavate, 

 9-15-27 x 3-4-7 ft, with 2-4-sterigmata, 4-6/z long. Basal hyphae 

 regular, thin- or slightly thick-walled, clamp connections sparse, 

 3-8 /A in diam.; subhymenial hyphae 2-3-5/x. in diam." Bourd. & 

 Galz. Stumps, logs, and fallen branches. Oct. March. Not un- 

 common, (v.v.) 



2293. C. coprophilum Wakef. /COTT/OO?, dung; $1X09, loving. 

 R. 1-2 cm., greyish white, effused, arachnoid, easily separable. 



Hymenium concolorous, pulverulent. Flesh whitish, filamentous, very 

 thin. Spores white, subglobose, apiculate at the base, 4/x, 1-guttulate; 

 basidia with 3-6-sterigmata, 15-25 x 6/x, with 3-6 curved sterigmata, 

 2-5/z. long. Basal hyphae 3-5-4/z in diam., scarcely nodose-septate. 

 Horse dung and surrounding grass culms. July Aug. Uncommon. 



2294. C. microsporum (Karst.) Bourd. & Galz. 



fjuicpo<$, small; (nropd, seed. 



R. 3-6 cm., milk white, or cream colour, irregularly effused, pellicu- 

 lose; margin white, pruinose, or fibrillose. Hymenium cream, with 

 sometimes a faint pinkish tinge, often imperfect, or cracked. Flesh 

 white, delicate, very thin, fragile. Spores white, subglobose, 2/z, or 

 3 x 2/x, often with a small oil drop; basidia 12-15(-18) x 3-4(-5)/^t, 

 with 2-4 straight sterigmata, 3-4/u, long. Basal hyphae 3-5^t, with 

 clamp connections, sometimes incrusted with crystals. Stumps and 

 branches. Sept. Oct. Uncommon. 



2295. C. croceum (Kunze) Bres. (= Sporotrichum croceum Kunze & 

 Schmidt; Corticium sulphureum Fr.) rcpo/cos, saffron. 



R. 1-4 cm., white, becoming yellowish, effused, arachnoid, then sub- 

 membranaceous, separable when fresh, adnate when dry; margin 

 white or lemon yellow, arachnoid, running out into the bright yellow or 

 saffron coloured, branched strands of the rhizomorphoid mycelium. 

 Hymenium concolorous, pruinose or mealy. Flesh concolorous, arach- 

 noid, thin. Spores white, "subglobose or ovoid, 2-75-3-5 x 2-5-3 ;u; 

 basidia 12-17 x 3-4-5/Lt. Hyphae thin walled, 2-3/x in diam., often 

 verrucose or rough with small crystals" Bourd. & Galz. Fallen sticks, 

 etc. Oct. Jan. "Not uncommon" Berk. 



