LEUCOSPORI. 107 



ing; flesh thin white. Stem 7.5-10 cent. (3-4 in.) long, 4-6 mm. Collybia. 

 (2-3 lin.) thick, fistulose, somewhat fragile, somewhat equal, or 

 slightly attenuated upwards, even, smooth, pallid-whitish, pubes- 

 cent at the base. Gills adnexed when young, then/ra?, somewhat 

 distant, broad, lax, quaternate, becoming pale-white. 



Commonly gregarious. Habit that of Mycena, but the margin is at first 

 incurved. 



On grassy slopes, beech-stumps. Uncommon. Oct. 



Name collis, a hill. From its habitat. Scop. Cam. p. 132. Fr. Monogr. 

 \. p. 161. Hym. Eur. p. 119. B. & Br. n. 1206. Seem. Journ. Bot. iv. p. 

 347. C. Hbk. n. 153. Illust. PI. 205. Schceff. t. 220. Fl. Dan. t. 1609. 

 A. arundinaceus Bull. t. 403. /. i. 



217. A. ventricosus Bull. Pileus tan or isabelline, slightly 

 fleshy, campanulato-convex, umbonate, smooth. Stem fistulose, 

 even, naked, rufescent, ventricose at the base, rooted. Gills arcuato- 

 adfixed, ventricose, lax, somewhat crowded, undulated, rufescent. 



Allied to A. dryophilus, but broader and moire lax. Var. albus Bull. t. 411. 

 /. B. 



In woods. Bathford, 1874, &c. Oct. 



Name venter, the belly. From the ventricose base. Bull. t. 41 1./. i, not 

 Schum. Fr. Hym. Eur. p. 120. B. &> Br. n. 1514, 1741. C. Illust. PL 145. 

 A. 



218. A. Stevensoni B. & Br. Pileus 12 mm. (^ in.) broad and 

 high, pallid yellow, semiovate, obtuse, viscid, here and there spotted 

 by the viscous matter. Stem 4 cent. (\ l / 2 in.) long, thin, scarcely 

 2 mm. (i lin.) thick, fibrillose, pulverulent upwards, composed of 

 fibres, internally and externally slightly rufous, rooting. Gills 

 adnate with a decurrent tooth, broad, distant, white. 



Allied to A. ventricosus, but differing in its slender almost solid stem, viscid 

 semiovate pileus, and very broad, adnate, somewhat ventricose, plane gills. 



In old pasture. Glamis, 1874. Aug. 



The root is remarkable, somewhat long and thread-like, going deep into the 

 soil. Name after Rev. John Stevenson. B. 6* Br. n. 1497. S. Mycol. 

 Scot. n. 122. C. Illust. PL 145. B. 



219. A. psathyroides Cke. Ivory-white. Pileus 18 mm. (% 

 in.) broad, nearly 2.5 cent, (i in.) high, campanulate, obtuse, rather 

 viscid, margin regular, even. Stem 7.5-10 cent. (3-4 in.) long, 

 hollow, erect, slender, equal, rather tough. Gills adnate, with a 

 decurrent tooth, very broad, triangular, rather distant, persistently 

 white. 



Spores elliptic, colourless, "015 x '007 mm. Allied to A. Stevensoni. Re- 



