AGARICINF. 137 



abuiulaut, but I liave not found it elsewhere. About 1 inch 

 across. My specimens are pure white, but it is said to be 

 sometimes rufous, growing pallid as it loses its moisture. 



188. A. (Pleurotus) tremulus, Sc/ueff. ; pilcus slightly 

 fleshy, reniform, depressed, tough, even; stem marginal, dis- 

 tinct, nearly round, ascending, villous ; gills adnate, determi- 

 nate, linear, distant, grey. — Soiv. t. 342. 



Amongst moss, on Fungi, etc. Rare. Malvern Hills. 

 Purton. Scotland, Hooker. Denbighshire, on Moelfre-uchaf. 

 About 1 inch across. Grey. Stem attached to the matrix 

 by a woolly mass. 



189. A. (Pleurotus) acerosus, Fr.; pileus membranaceous, 

 reniform, plane, striate, somewhat lobed, hygrophauous; stem 

 very short or obsolete, lateral, somewhat strigose at the base ; 

 gills determinate, linear, crowded, simple, grey. — Bolt, t. 72. 

 /. 3. 



On gravel, lawns, wood, etc. Rare. Hiteham, Suflblk, 

 Prof. Htnslow. A small grey species. 



III. Pileus at first resupinate, 

 * Pileus jlesliy, uniform. 



190. A. (Pleiirotus) porrigens, P. ; white ; pileus fleshy, 

 tough, at first resupinate, then ascending from the extended 

 base, car-shaped, smooth above; gills very narrow, linear. 



On old pine-trunks. Rare. Inverary, Klotzsch. 



191. A. (PlOTirotus) septicus, P.; white; pileus thin, 

 slightly fleshy, re-jupinatc, then reflected, even, pubescent; 

 stem slender, incurved, pubescent, at length evanescent ; 

 springing from byssoid rootlets; gills distant. — Sow. t. 321. 



On twigs, decayed Fungi, dung, etc. Not uncommon. 

 Pure white, very variable in size and form, but always 

 small. 



