208 AGARICUS. 



Leptonia. 456. A. sethiops Fr. Pileus 1-2.5 cent - (K- 1 in O broad, black 

 then fuliginous, slightly fleshy, piano -depressed, without striae, 

 streaked with fibrils, smooth however, shining. Stem 4-5 cent. 

 (1^-2 in.) long, slender, scarcely 2 mm. (i lin.) thick, somewhat 

 stuffed, smooth, fuscous-blackish, black-dotted upwards. Gills ad- 

 nexed or adnate, sometimes linear, sometimes ventricose, whitish, 

 edge which is of the same colour quite entire. 



The pileus is not hygrophanous, but when young and dried is shining black. 

 It differs from A. lampropus in the pileus, which is at the first depressed, and 

 the stem being thinner, the former becoming smooth and shining, the latter 

 black-dotted. It differs from A. serrulatus, to which it is certainly nearest, 

 in the absence of an umbilicus, and in the gills in no wise becoming dark-blue 

 and being quite entire and of the same colour at the edge. 



In grassy places in woods. Killin, 1876, &c. Sept. 



Spores irregularly 6-angled, 10-13 x 8 mk. B. Name Al0io^, an Ethiopian. 

 Black. Fr. Monogr. i. /. 286. Hym. Eur. p. 202. Icon. t. 97. / 3. B. & 

 Br. n. 1649. S. Mycol. Scot. n. 256. C. Illust. PL 332. a. 



457. A. solstitialis Fr. Pileus becoming fuscous, slightly 

 fleshy, at length depressed, papillate in the centre, slightly wrin- 

 kled, obsoletely innato -fibrillose. Stem somewhat fistulose, 

 smooth, not dotted, smoke-colour. Gills emarginate, broad, whit- 

 ish, of the same colour at the edge. 



It differs from A. cethiops in its papillate, slightly wrinkled, fuscous pileus, 

 and its smoke-coloured, not dotted stem. 



Among stones and on grassy ground. Loch Kinord, &c. Aug.- 

 Sept. 



Spores very irregular, 6-angled, 12-18x6-8 mk. B. Name solstitium. 

 From the summer solstice. Fr. Hym. Eur. p. 202. Monogr. \. p. 286. B. 

 & Br. n. 1226. S. Mycol. Scot. n. 257. C. Illust. PL 332. b. Kalchbr. t. 



12. /. 3 . 



** Gills at the first azure-blue or slightly dark-blue. 



458. A. serrulatus Pers. Pileus at first blackish-blue (shin- 

 ing when dried), fuliginous when old, not hygrophanous, slightly 

 fleshy, convex, umbilicato-depressed, without striae, squamulose. 

 Stem 2.5 cent, (i in.) long, 2 mm. (i lin.) thick, cartilaginous, 

 somewhat fistulose, equal, smooth, paler than the pileus, black- 

 dotted at the apex, white -woolly at the base. Gills adnate, in 

 the form of a segment, broad in the middle, bluish-grey-whitish, 

 with a black serrulated edge, at length grey-flesh-colour. 



The stem varies black, azure-blue, bluish-grey, glaucous, and grey. The 

 pileus is black and shining when scorched by the sun, but fuliginous and 

 slightly striate in moist weather. In damp groves it is paler and black- 

 streaked. There is a thinner variety with the stem smooth and grey-fuscous, 



