666 STEREUM 



2260. S. stratosum B. & Br. Stratosum, stratose. 

 R. 5-10 cm., bright ochraceous white, becoming yellowish, effused, 



smooth, here and there wrinkled. Flesh pallid, stratose, strata at 

 length broken up. Rare. 



**Hymenium pubescent, velvety. 



2261. S. Chailletii (Pers.) Fr. D. Chaillet. 

 R. 215 cm., somewhat fawn colour, or brownish, broadly effused, 



resupinate the first year, then becoming stratose, and at length pileate, 

 pilei sometimes well developed, tomentose, more or less concentrically 

 sulcate; margin entire. Hymenium pale ferruginous, or fawn colour, 

 pubescent, velvety. Flesh pallid, coriaceous, fairly thick, "composed 

 of somewhat longitudinally and not densely interwoven hyphae, 

 3 4-5/A in diarn., some of which are hyaline, thin walled, and with 

 deeply staining protoplasm, and many thick walled, stiff, giving their 

 colour to the fructification and curving into the hymenium where 

 they terminate in cystidia" Burt. Spores "hyaline, elliptical, in- 

 equilateral, 6-7-5 x 3-4ja. Cystidia yellowish, rough, fusiform, cylin- 

 drical, 50-120 x 4-5 //,, or in old stratose plants, 45-60 x 5-7 ju," Bres. 

 Felled fir trunk. Oct. Dec. Rare, (v.v.) 

 S. disciforme (DC.) Fr. = Aleurodiscus discifonnis (DC.) Pat. 



***Hymenium pruinose. 



2262. S. abietimun (Pers.) Fr. Abietinum, of firs. 

 R. 2-8 cm., burnt umber, resupinate, effused, rarely reflexed, tomen- 

 tose, obscurely zonate, tuberculate or uneven. Hymenium light drab 

 to cinereous or glaucous, pruinose. Flesh coloured, coriaceous-spongy, 

 thick, "intermediate layer composed of longitudinally arranged, inter- 

 woven, coloured hyphae, 3-3-5/z in diam., bordered on its outer side 

 by a darker, denser zone which connects with the tomentose covering ; 

 hymenial layer becoming zonate and containing numerous, coloured, 

 cystidia. Spores hyaline, flattened on one side, 9-13 x 4-5 p,. Cystidia 

 coloured, cylindric, obtuse, even, rough walled or more or less in- 

 crusted, 90-150 x 6-8^, protruding up to 60/x" Burt. Pine and 

 Abies trunks and logs. Rare. 



2263. S. Pini Fr. Pini, of pines. 

 R. 1-4 mm., fuscous, then Benzo-brown, resupinate, adnate, at first 



orbicular, then confluent, and again broken up into bullate tubercles, 

 smooth beneath; margin fimbriate, lobed. Hymenium purple flesh 

 colour, becoming fuscous, pruinose. Flesh coriaceous-cartilaginous, 

 rigid, thin at the margin, "intermediate layer bordered on each side 

 by a narrow, coloured zone, and composed of longitudinally arranged, 



