668 HYMENOCHAETE 



2266. H. tabacina (Sow.) Lev. (= Stereum tabacinum (Sow.) Fr.; 

 Stereum avellanum Fr. in part; Hymenochaete avellana (Fr.) 

 Cke.) Sow. Brit. Fung. t. 25, as Auricularia tabacina Sow. 



Tabacina, tobacco colour. 



R. 330 cm., subferruginous, becoming brown, margin golden, effused, 

 reflexed, often imbricate, sometimes entirely resupinate, silky, at 

 length, becoming smooth. Hymenium paler, snuff brown, or sepia, 

 setulose, often deeply cracked into a series of radial anastomosing 

 cracks when resupinate. Flesh golden, coriaceous, flaccid, thin, inter- 

 mediate layer composed of "longitudinally arranged, orange-yellow 

 hyphae, 2-5 3^ in diam., bordered on each side by a narrow, dark, 

 dense zone" Burt. Spores white, oblong, often curved, 4-6 x 1-5-2 fj,. 

 Setae coloured, conico-acuminate, 70-100 x 8-12/z. Stumps, trunks, 

 and logs, especially of frondose trees. Sept. March. Not uncommon. 

 (v.v.) 

 H. avellana (Fr.) Cke. = Hymenochaete tabacina (Sow.) Lev. 



2267. H. Boltonii (Fr.) Cke. (= Corticium Boltonii Fr.) 



James Bolton, author of "An History of Fungusses growing 



about Halifax." 



R. 34 cm., white to ochre, or pale lavender, zoned brown, or black, 

 effused; margin shortly reflexed, villose. Hymenium white to pale 

 brown, becoming ferruginous fuscous, or dark red, setulose. Setae 

 "clavate, attenuated at the base, 70-80 x 10-1 Ifj,, smaller in re- 

 supinate forms " Cke. Bird cherry. Feb. Rare. 



II. Resupinate. 



A. Hymenium simple. 



f Setae acuminate. 



*Spores white. 



2268. H. nigrescens Cke. Nigrescens, becoming black. 

 R. 2-5 5 cm., fuscous, becoming black, peltate, subcircular, solitary, 



or gregarious, sometimes confluent, adnate; margin sometimes free 

 and slightly reflexed, smooth and greyish beneath. Hymenium brown, 

 then blackish, or blackish umber, setulose, often cracked. Flesh rigid. 

 Spores "white, elliptical, 10 x 5/z. Setae blackish, conical, 80-140 x 

 10-12 ft" Massee. Dry wood. May. 



2269. H. Stevensonii B. & Br. (= Stereum rufo-hispidum Stev.) 



Rev. John Stevenson, the eminent Scotch mycologist. 

 R. 24 cm., pale fawn colour, effused, adnate ; margin abrupt, some- 

 times a little thickened, and raised. Hymenium livid, or greyish pink, 

 with a tinge of lilac when dry, setulose. Flesh rigid. Spores white, 

 "elliptic fusoid, 6-7 x 3-4/1,. Setae (rufous), rigid, 20-40 x 8-10/*" 

 Massee. Bark of yew. Sept. April. Rare, (v.v.) 



