268 AGARICUS. 



Fiammuia. 598. A. gummosus Lasch. Pileus 2.5-5 cent - ( T ~ 2 i n -) broad, 

 pallid light yellow or becoming green, at length becoming fer- 

 ruginous with the spores, paler at the circumference, fleshy, regu- 

 lar, campanulate then soon flattened, obtuse or depressed, covered 

 with a separable, viscid pellicle, and sprinkled with superficial 

 floccose scales, even when these separate, smooth ; flesh thin, be- 

 coming yellow. Stem 7.5 cent. (3 in.) long, 4-6 mm. (2-3 lin.) 

 thick, stuffed, or hollow when old, equal, tense and straight, rigid, 

 silky-fibrillose, ferruginous -rubiginous at the base and for the 

 most part when full grown, paler upwards. Gills adnate, crowded, 

 narrow, at first white-light-yellow, then cinnamon. 



Inodorous, not bitter. 



On old stumps. Botanic Garden, Cambridge, &c. Dec. 



Name gummi, gum. Viscid. Lasch Linn. 1827, n. 325. Fr. Monogr. 

 \.p. 354. Hym. Eur. p. 247. Icon. t. n6./. 2. B. & Br. n. 1119. C. Hbk. 

 n. 342. Illust. PI. 441. A. tricolor Tratt. Austr.f. 38. 



599. A. spumosus Fr. Pileus about 5 cent. (2 in.) broad, pallid 

 light yellow, disc often darker, slightly fleshy, convex then plane, 

 somewhat umbonate, covered with a viscous separable pellicle, 

 but naked (never sprinkled with squamules), even ; flesh watery, 

 light yellow-green. Stem 5-10 cent. (2-4 in.) long, 4 mm. (2 lin.) 

 thick, hollow, thin, attenuated downwards, light yellow or of the 

 same colour as the pileus, more or less fibrillose, but remarkably 

 furnished with a cortina. Gills adnate, crowded, light yellow 

 then ferruginous. 



Gregarious, somewhat caespitose, inodorous, very viscous in rainy weather. 

 It varies with the pileus light yellowish and the stem olivaceous-fuscous. 



In fir woods and on sawdust. Rare. Sept.-Nov. 



Spores 5 mk. B. & Br. ; 5x4 mk. W.G.S.; subellipsoid, 7-8x4 mk. K. 

 Name spuma, froth. Fr. Monogr. i. p. 354. Hym. Eur. p. 247. Icon. t. 

 116. / 3. B. 6^ Br. n. 1240. C. Hbk. n. 343. Illust. PL 476. S. Mycol. 

 Scot. n. 320. 



600. A. carbonarius Fr. Pileus 2.5 cent, (i in.) or a little more 

 broad, tawny, fleshy, convex then soon plane and often depressed 

 at the disc, even, smooth, viscous, margin inflexed ; flesh slightly 

 firm, yellow. Stem about 2.5-4 cent. (i-iX i n -) l n g 2 mm. (i 

 lin.) rarely more thick, somewhat fistulose, rigid, equal or slightly 

 thickened upwards, &or\\\osQ-squamulose, pallid, often blackish at 

 the base. Cortina fibrillose, fugacious. Gills adnate, crowded, 

 rather broad, becoming fuscous-clay-colour. 



The soil is often rolled together by the mycelium into a small bulb. The 

 blackness at the base of the stem may be from its habitat. Densely gregari- 



