LEUCOSPORI. 149 



Berk. Out. p. 129. /. 6./ 7. C. Hbk. n. 208. Illust. PL 192. S. Mycol. Mycena. 

 Scot. n. 186. Brigant. t. 35. / 6. Gonn. & Rab. t. j.f. 3. Pers. Myc. Eur. 

 3. /. 28. /. 6. 



IX. INSITITI^E. Stem inserted, &>c. 



317. A. corticola Schum Pileus 4-8 mm. (2-4 lin.) broad, 

 blackish, becoming azure-blue, fuscous, cinereous, &c., thin, hemi- 

 spherical, obtuse, at length obsoletely umbilicate, deeply striate, 

 smooth or flocculoso-pruinate. Stem about 12 mm. (Jjj| in.) long, 

 scarcely I m. ()4 in.) thick, delicately fistulose, incurved from 

 situation, smooth or slightly furftiraceous, paler than the pileus. 

 Gills adnate, uncinate with a small decurrent tooth, broad, some- 

 what ovate, distant, paler than the pileus. 



Very changeable in colour. On account of its similar habitat it is com- 

 monly confounded with A. hi email's. Always small, soon corrugated in dry 

 weather, becoming flaccid. Growing in troops. 



On living trunks, ash, oak, c., among moss. Common. 

 Aug.-Dec. 



Withering when dry, but often reviving when moistened. M.J.B. Spores 

 subsphaeroid, 9-11 mk. K. ; 4x8 mk. W. G.S. Name cortex, bark; colo, to 

 inhabit. Growing on bark. Schum. Sail. n. 4689. Fr. Monogr. i. p. 232. 

 Hym. Eur. p. 152. Icon. t. 85. f. 2. Berk. Out. p. 129. C. Hbk. n. 209. 

 Illust. PL 164. S. Mycol. Scot. n. 187. Schnizl. apud Sturm. Heft. 3. /. 2. 

 Mich. t. 74. /. 8. B. becoming light-yellow-white. 



318. A. hiemalis Osbeck. Pileus thin, campanulate, obsoletely 

 umbonate, striate at the margin. Stem thin, ascending, slightly 

 downy downwards. Gills adnate and uncinate, narrow, linear, 

 whitish. 



In the same habitats as A. corticola, but more scattered. It is distinguished 

 but with difficulty from A. corticola: by the stem being longer, erect or 

 ascending, scarcely incurved, pubescent downwards, by the campanulate 

 pileus being obtusely umbonate, striate only at the margin, and chiefly by its 

 narrow linear gills. The colour also is constantly paler, whitish, flesh-colour- 

 rufescent, &c., scarcely ever azure-blue or fuscous. 



On trunks, oak, &c. Rare. Sept.-March. 



Name hiems, winter. Occurring in winter. Osbeck in Retz. Suppl. p. 19. 

 Fr. Hym. Eur. p. 153. Monogr. \. p. 233. Icon. t. 85. f. i. B. & Br. n. 

 993. C. Hbk. n. 210. Illust. PL 164. S. Mycol. Scot. n. 188. Gonn. & 

 Rab. t. j.f. 6. A. corticalis Bull. t. 519.7. i a (white), b (flesh-colour-rufous). 



319. A. setosus Sow. Pileus becoming fuscous, hemispheri- 

 cal, obtuse, smooth. Stem inserted, capillary, everywhere shaggy 

 with distant spreading hairs. Gills distant, white. 



Pileus very small, very tender. 



On dead leaves (beech) in woods. Rare. 



