CLASSIFICATION OF AGARIl 



;it first, covered by a more Qr less dense tomentum, especially toward 

 base, above with a Bomewhal temporary annulus from the thio, 

 membranous veil, which is quickly lacerated and disappears 

 pilena expands. SPOKES oblong, 9 lOi I 1.5 micr., smooth, w h i r . - 

 ODOB very strongly of oil of bitter almonds (benzaldehyde 



From base of stumps, on trunks, etc. Marquette. August En- 

 frequent. 



The plants described above were growing oear the ground and 

 in a imiisi situation and this maj accounl for the unusual tomen- 

 tosity on the stem. The Bize of the Bpores, which appeared t" be 

 mature, would Beem t<> be one basis of separation from the oexl 

 species. When the stem is lateral or iK-.i 1 1 \ -... the pileus Is usual 

 ly Bubreniform. 



695. Armillaria corticata Fr.-Pat. 



Syst Myc, 1821. 



Illustration: Atkinson. Biushrooms, PL "••">. Pig. L07. (Small 

 forms as Pleurotus. I 



PILEUS 6-15 cm. or more broad, convex-expanded, obtuse or 

 depressed, firm, dull white or becoming brotcnish tinged, finely 

 floccose ai first, then the cuticle breaks up into scale-like art 

 margin ai firsl involute and appendiculate, FLE8B thick, white. 

 GILLS decurrent, moderately close, rather broad, narrowed behind, 

 while becoming yellowish, anastomosing on tin stem, edge entire. 

 STEM HO cm. long, eccentric or almosl lateral, Bometimes Btoul 

 and short, solid, firm to rigid, subtomentose or fio reticul 



in large specimens, equal or tapering down. VEIL attached near 

 apex, leaving a thin, white fioccose-membranous evanescenl ring, 

 or sometimes remnants oe the margin of the pileus. SPORES 

 cylindrical-elongated, large, l.'lTx I ."• micr.. smooth, white, r. \ 

 SIDIA 1-spored. ODOB slightly acid-aromatic to foetid. 



Solitary or caespitose, on wood, especially on living trunks of 

 hickory, maple, etc. Ann Arbor, Marquette. September-November. 

 Infrequent. 



This is considered by Atkinson (Mushrooms, p. 106, 1900 

 merely a form of A. dryina, and as far as the variation of stem 

 length and size of planl are concerned, such a conclusion is well - 

 ported. The difference in the ^-'r/.r of the spores In our collections 

 has. however, opened up the question again, and further Btudy 



