STEBEUM 665 



var. atro-marginatum W. G. Sm. Sow. Eng. Fung. t. 412, fig. 1, as 

 Auricularia elegans Sow. Ater, black; marginatum, bordered. 

 Differs from the type in the narrow, black zone near the white margin 

 of the p. Dead branches. Sept. Nov. Uncommon, (v.v.) 



2256. S. ragosiusculum Berk. & Curt. (= Stereum purpureum (Pers.) 

 auct. pi.) Rugosiusculum, somewhat wrinkled. 



R. 2-6 cm., cartridge-buff to cinnamon buff when dry, more or less 

 broadly reflexed, rarely resupinate, tomentose, spongy, sometimes with 

 projecting hairs collapsed together into a plane or wrinkled surface; 

 margin entire. Hymenium vinaceous-buff to fawn colour when dry, 

 even. Flesh whitish, coriaceous-soft, fairly thick. Spores white, 

 elliptical, incurved, 5-7 x 3-4 p. Hymenial cystidia cylindrical, 

 thin walled, 4ju in diam., subhymenial cystidia vesiculose, 1530 x 

 10-20/u,. Logs and stumps of frondose trees. Jan. Dec. Common. 

 (v.v.) 



2257. S. conchatum Fr. Koyxy, a mussel shell. 

 R. 430 mm., dirty yellowish, effuso-reflexed, then shell-shaped, 



subimbricate, rugose, glabrous, obscurely zoned, somewhat crisped. 

 Hymenium fuscous, smooth. Flesh coriaceous, thin. Fir. Rare. 



2258. S. bicolor (Pers.) Fr. (= Stereum fuscum (Schrad.) Quel.) Fr. 

 Icon. t. 197, fig. 2. Bicolor, two coloured. 



R. 1-5 cm., snuff-brown to bistre when dry, sometimes resupinate, 

 generally becoming conchate-reflexed, often imbricate, villose, be- 

 coming glabrous, somewhat concentrically sulcate. Hymenium white, 

 then cream colour to pallid mouse grey when dry, even, smooth. Flesh 

 submembranaceous, soft, spongy, "composed of longitudinally and 

 loosely interwoven hyphae, 3/t in diam., coloured towards the 

 upper surface, hyaline towards the hymenium. Spores hyaline, 3- 

 4-5 x 2-3 fi. Gloeocystidia hyaline, flexuose, 20-60 x 5-7 /A" Burt. 

 Rotting frondose limbs and sometimes on pine. April Dec. Rare. 



III. Effused, resupinate, margin scarcely, or not at all free. 

 *Hymenium stratose. 



2259. S. frustulosum (Pers.) Fr. Frustulosum, full of pieces. 

 R. 2-5 mm., date-brown-blackish, resupinate, tuberculose, crowded as 



if confluent, and then broken up into frustules, sometimes growing 

 outward from the place of attachment and narrowly reflexed, or with 

 a free margin all round, concentrically sulcate, glabrous. Hymenium 

 pinkish buff to whitish, convex, pruinose, stratose. Flesh woody, thick. 

 Spores "hyaline, oboval, 5-6 x 3-3-5/x. Paraphyses bottle-brush, or 

 aculeate, numerous" Burt. Oak logs and stumps. Rare. 



