90 AGARICUS. 



Clitocybe. / 3- B. ^ Br. n. 151 1. S. Mycol. Scot, n. 103. A. cyathiformis var. ex- 

 pallens C. Illust. PL 220, 



180. A. obbatus Fr.— Pileus 2.5 cent, (i in.) broad, fuscous- 

 blackish, becoming very pale when dry, cinereous, someivhat 

 tnembranaceous, scissile only at the disc, convexo-plane with a 

 broadly umbilicate disc, smooth, striate to the Diiddle. Stem 5 

 cent. (2 in.) and more long, equal, 2-4 mm. (1-2 lin.) thick, but in 

 becoming compressed 6-8 mm. (3-4 lin.) broad, hollow, often 

 ascending or flexuous, s?nooth, naked, slightly striate (strise inter- 

 rupted white), fuscous-cinereous. Gills slightly deciirre7it, dista?it, 

 broad, dark cinereous, 'white-priii7iose. 



B. Pileus infundibuliform ; stem spongy-soft, internally fistulose with floc- 

 cose vanishing villous down, wholly smooth, even and naked; gills almost 

 bluish-grey-cinereous. The whole very watery, tough, flexible, inodorous. 

 Easily distinguished by its slender stature, its striate pileus, and distant gills, 

 which are at length white pulverulent, as in ^. melleus or laccatus. 



In fir woods. Ely, 1870, &c. Nov. 



Name — obba, a kind of cup. From its shape. Fr. Monogr. \. p. 129. Hym. 

 Eur. p. loi. Ico?i. t. 57. f. I. B. K^ Br. n. 1200*. Buxb. iv. /. 3. f. i. 

 Bull. t. zjfSf. C. represents its habit excellently, but the stem is coloured 

 white. C. Illust. PI. 230. 



181. A. pruinosus Lasch. — Pileus 2.5-5 cent. (1-2 in.) broad, 

 brown, becoming cinereous when dried, hygrophanous, fleshy- 

 membranaceous, when young umbilicate and pruinose, when full 

 grown broadly infundibuliform and smooth, sometimes squamu- 

 lose ; flesh thin, becoming cinereous. Stem 2.5-5 cent. (1-2 in.) 

 long, 2-3 mm. {1-1% lin.) thick, stuffed or obsoletely fistulose, 

 equal, often ascending or curved, Jibrillose when young, of the 

 same colour as the pileus, but often paler. Gills decurrent, 

 crowded, narrow, slightly arcuate when young, scythe-shaped when 

 full grown, white then dingy. 



Thin, slightly rigid, inodorous. The pruina on the pileus is lead-colour. 

 The stem is more solid, thickened, and flocculose at the base. Easily distin- 

 guished from neighbouring species by its habit and colours. Like A. cyathi- 

 formis, but perhaps nearer to Hydrogrammi. 



On rotten wood and on the ground. Kew, 1882. Nov.-Dec. 



"^dime^pruina, hoar-frost. From the pruina on the pileus. Lasch. — Fr. 

 Hym. Eur. p. loi. Icon. t. $7. f. 3. C. Illust. PL 231. 



182. A. concavus Scop. — Pileus 2.5-5 cent. (1-2 in.) broad, 

 hygrophanous, fuliginous when moist, cinereous or clay-hoary 

 when dry, slightly fleshy, very thin, flaccid, at first plano-convex, 

 widely and deeply umbilicate, then wholly concave (not infundi- 

 buliform), smooth, the convexo-plane border u?idulated, margin 



