112 FUNGI. [Agariais. 



its transparency ; flesh thick in the centre, the margin membranaceous. 

 Gills ventricose, adnate, chocolate-coloured ; exti-eme margin white. 

 Sporules brown-purple. Stem 4 inches high, slender, flexuous, nearly 

 equal, thickened at the very base, subrufescent, fibrillose below, pulver- 

 ulento-squamulose above, fistulose ; the base sometimes clothed with 

 blue down. Sovverby infornis us that this species nearly proved fatal 

 to a family in London. 



29G. A. foe}iisecu, Pers. (eddish Agaric) ; pileus subcarnose 

 smooth dilute-umhei\ turning pale, gills adnexed umber, stem 

 naked smooth rufescent. Pers. Ic. et Desc. t. 11. /i 1. Pers, 

 Syn, p. 411. Fr. Syst. Myc. v. I. p. 295. 



Amongst grass after a week's rain at Spondon, Derbyshire. April. — 

 Gregarious. Pileus 1 — 2 inches broad, hemisphaerical or campanulate, 

 brown-umber, the margin transparent and minutely rugose, banded with 

 various tints when losing its moisture; in decay it has a burnt appear- 

 ance, and at length dries up and is black. GiHs distant, broad, ventri- 

 cose, attached, umber, mottled, the extreme margin white. Stem 2 — 3 

 inches high, li line thick, subflexuous, fistulose, at first slightly pul- 

 verulent, umber, the apex striate, the base cottony. I am not quite 

 sure whether this is the true plant of Persoon, as the gills in my plant 

 are adnate and the colour more intense, but Fries says that the gills 

 are so ventricose that they appear emarginate and are perhaps after all 

 adnate and not merely adnexed. I hope, however, at some future 

 period to publish figures of this and some other new and doubtful 

 species, by which, if I should describe any species under v/rong names, 

 which it is almost impossible to avoid in so intricate and extensive a 

 genus, the errors may at length be corrected by competent judges. 



Subgenus 33. Psathyra; (from -^c/Ju^oc, bi^itlle.) Veil inar- 

 ginal, very fugacious. Stem fistulose, equal, brittle, lohite, sub- 

 pridnose. Pileus submembranaceous, ivhen young glandiform, 

 then campanulate, at length expanded, iiearly plane, obtuse, brittle, 

 dry, soft to the touch, clothed uith innate atoms or Jibrillce. Gills 

 fixed, rarely free. Sporules in many of the species arranged 

 in fours. — Growing amongst chips, i?i inoist grassy places, &cc., 

 071 the ground. 



297. A. areolcitus, Klotzscli, {arcolated Agaric) ; pileus sub- 

 carnose clothed with minute fibrilla?, the epidermis cracking 

 into nearly equal square patches, gills fixed umber at length 

 black, stem hollow. Klotzsch, 3ISS. 



Gardens. May — Oct. Botanic Garden, Glasgow. Klotzsch, in 

 Hook. Herb — " Pileus H — 3 inches broad, convex, ochre or fuscous ; 

 veil between fibrous and membranaceous, fugacious. Gills 2 — 3 lines 

 broad, the edge white and beaded with drops of moisture. Stem 2 — 3 

 inches high, 3 lines thick, generally thickened at the base, fibrillose, 

 dirty-white." Apparently a very distinct species. 



298. A. stipdtus, Pers. (crowded Agaric) ; pileus subcarnose 

 smooth bright-brown pale when dry, gills close adnate umber, 

 stem smooth, Pers. Syn. p, 423, pr, Syat. Myc. v. 1, p, 296. 



