LEUCOSPORI. 65 



or fuscous then rufescent, with a darker and vanishing umbo ; Tricholoma. 

 stem solid, somewhat fibrillose, sometimes elongated, sometimes 

 curt ; gills white. 



Coed Coch, 1881. Bull. t. 443, the rufescent figures with smooth stem. 

 Fr. Hym. Eur. p. 75. B. & Br. n. 1928, the long-stemmed form. C. Illust. 

 PL 119. B. 



124. A. brevipes Bull. Pileus about 5 cent. (2 in.) broad, 

 umber then becoming pale, fleshy, soft, convex then becoming plane, 

 even, smooth, moist (opaque when dry) ; flesh of the pileus be- 

 coming fuscous when moist, becoming white when dry. Stem 

 solid, very rigid, at length fibrous, pruinate at the apex, externally 

 and internally fuscous; otherwise very variable, sometimes very 

 short, 4-6 mm. (2-3 lin.) only long and thick, attenuated down- 

 wards; commonly 2.5 cent, (i in.), sometimes bulbous, sometimes 

 equal, more slender. Gills emarginato-free, crowded, ventricose, 

 disappearing short of the margin, quite entire, becoming fuscous 

 then whitish. 



Solitary. Inodorous. The pileus is often stained with soil. Nearer to 

 A. arcuatus than to A. humilis. The affinity between A. arcuatus, A. pancs- 

 olus, A. grammopodius, A. melaleucus, and A. humilis, is greater than be- 

 tween other species of Tricholomata, 



In open woods, fields, &c. Uncommon. June-Oct. 



Spores 6x8 mk. W.G.S. ,-8x5 mk. W.P. ; 8-10 x 5-6 mk. B. Name 

 brevis, short, pes, a foot. Short-stemmed. Bull. t. 521. /. 2 (young). Fr. 

 Monogr. \.p. 94. Hym. Eur. p. 75. B. & Br. n. 1195. C. Hbk. n. 78. 

 Illust. PL 68. S. Mycol. Scot. n. 77. Paul. Ch. t. 44.7. i, 2. Fl. Bat. t. 

 1095. Klotsch. FL Bor. t. 374. Buxb. C. iv. /. 31.7. i. 



125. A. humilis Fr. Pileus 5-7.5 cent. (2-3 in.) broad, fuscous- 

 cinereous, &c., fleshy, convex then soon flattened, somewhat re- 

 pand, sometimes umbonate, even, smooth, sometimes depressed, 

 the thin margin exceeding the gills ; flesh soft, becoming cinere- 

 ous when moist, whitish. Stem 2.5-5 cent. (1-2 in.) long, about 

 12 mm. ( l /z in.) thick, stuffed, at length also hollow, soft, fragile, 

 somewhat equal, wholly pulverulento-villous, becoming cinereous- 

 whitish. Gills rounded-adnexed, decurrent with a tooth, and 

 occasionally arcuato-decurrent, crowded, 4-6 mm. (2-3 lin.) broad, 

 whitish. 



The pileus changes colour with the moisture of the atmosphere and with 

 age, blackish, fuscous, livid, pallid. In dry weather it is sometimes sprinkled 

 with thin white dust (the remains of the veil). Allied to A. brevipes, but the 

 stem is thinner, longer, and softer. Protean, gregarious, often caespitose 

 (A. brevipes always solitary). A very fragile variety occurs with the pileus 

 paler, the stem longer hollow and fibrillose, and the gills narrower. 



In open woods, &c. Frequent. Aug.-Oct. 



E 



