CLASSIFICATION OF AGARK 



697. Pleurotus elongatipes I' EDIBLI 



.lour, of Mycologj . Vol. I I. 1908. 



PILEUS 5 I 11 fin. broad, convex or nearh plane, glabrous, white, 

 even on the margin. I ' U is 1 1 rather thin, white UILI H 

 then emarginate, rounded behind, close, moderately broad, thin, 



white. STEM very long, 5 la cm., •'> 10 i thick, hoi 



loir, variously curved or rlexuous, usually eccentric, glabrou* 

 more or less tomentose toward base, white. SPORES niin 

 sphoeroid, I •"> micr. in diain., si th. 



i Dried: Pileus and gills ochraceous tan, st,-m ding} buff. i 



Subcaespitose or solitary. <>n prostrate trunks or dei . 

 Whitmore Lake, Washtenaw Count} and Stevens Lake, Wayne 

 County. October. Rare? 



This Bpecies seems limsi closel} related to /'. ulmarius, ami 

 no doubt often confused with it. Peck, who described it from the 

 Wayne County specimens senl him by Dr. O. E. Fischer, considers 

 it most closely related to /'. lignatilis. It differs from P. lignal 

 in its much stouter habit, and adnexed-emarginate gills. From 

 /'. ulmarius it seems separable i>> its stuffed to holloa Btem. All 

 of the cotype specimens in my possession have a rather large li"l 

 low stem when dried. Those in another collection have the habit and 

 appearance of /'. ulmarius, bu1 with the characteristic hollo* stem 

 in the dried condition. Dr. Peck's acuteness has thus, I beli< 



found thai our common Pleurotus ulmarius is c posed, .it li 



in this region, of two distinct species. It is oo doubt edible and 

 the separation is only of scientific interest. The Btetna ol ,! i 

 specimens were very long, i»ut it is likely thai those were \>\ 

 of an cm reme form. 



698. Pleurotus sulfuroides Pk. 



X. V. State Mus. Rep. 23, 1872. 



Illustration: Atkinson, Mushrooms, Fig 108. p. 107 



PILEUS 2-7 em. broad, convex, umbi snbex|i 



fibrillose or minutely scaly, glabrescent, pale yellow. \ 

 when moist. FLESH thin, soft. GILLS slightly 

 Brst, soon emarginati and rounded behind, clos 

 sulfur-yelloic to yellowish, white-fl 



