274 AGARICUS. 



Fiammula. of the same colour as the pileus. Stem 5~7-5 cent. (2-3 in.) long, 

 2-4 mm. (1-2 lin.) thick, fistulose, slightly attenuated upwards, 

 tense and straight, when young everywhere white-pulverulent, 

 umber. Cortina none. Gills ascending, crowded, narrow (scarcely 

 2 mm. (i lin.) broad), yellow then becoming ferruginous, normally 

 adnate, but varying decurrent and separating. 



Spores ferruginous. Caespitose, slender. There is a smaller variety with 

 the pileus campanulate and rimuloso-papillate. 



On old deal boards, and pine-stumps. Rare. 



Spores spheroid-ellipsoid, 8x5-6 mk. K. ; 5x4 mk. W.G.S. Name 

 TTiKpos, hitter. Fr. Monogr. i. p. 362. H\>m. Eur. p. 251. Icon. t. 119. f. 2. 

 B. 6" Br. n. 1244. C. Hbk. n. 350. Illust. PL 448. 



V. SERICELLI. Furnished with a cortina, &c. 



613. A. helomorphus Fr. Pileus 12-18 mm. (%-% in.) broad, 

 white, truly fleshy, convexo-plane, gibbous or with a broad obtuse 

 prominent umbo, often angular, viscid; when dry becoming ad- 

 pressedly fibrilloso-even, the thin unequal margin inflexed, naked. 

 Stem scarcely 2.5 cent, (i in.) long, 4 rarely 6 mm. (2, 3 lin.) thick, 

 solid, equal or not perceptibly attenuated from the base, ascending 

 from the incurved base, wholly even and smooth, whitish. Gills 

 plano-decurrent, very crowded, not 2 mm. (i lin.) broad, whitish, 

 scarcely clay-colour. 



Stem slightly adpressedly silky upwards only under a lens. Spores pallid 

 ferruginous, paler than in the rest of the species. 



In fir woods. Mossburnford. Nov. 



Spores pale brown, 4x6mk. B. & Br. ; 3x4 mk. W.G.S. Name ijAos, 



a nail; pop^i}, form. Nail-shaped. Fr. Monogr. \.p. 349. Hym. Eur. p. 252. 



Icon. t. 120. f. 4 var. B. er 1 Br. n. 1239. C. Hbk. n. 338. Illust. PL 449. A. 

 S. Mycol. Scot. n. 330. 



614. A. scambus Fr. Pileus 1-2.5 cent - ( l A-i in.) broad, whit- 

 ish, fleshy, thin, convex then plane and depressed, slightly silky, 

 when young viscous in wet weather, but the viscus is soon ab- 

 sorbed by the underlying down, so that it is commonly very dry, 

 opaque. Stem 1-2.5 cent - ( 1 A~ 1 in.) or little more long, 2 mm. (i 

 lin.) thick, stuffed, equal, curved-ascending, flocculose or sprinkled 

 with white mealy squamules, whitish, pubescent at the base. Gills 

 adnate, crowded, somewhat repand, light yellow-clay-colour. 



The stem has a paler line down the centre indicative of hollowness, and 

 is fixed by the effused white naked mycelium. A very distinguished species, 

 departing very much from the type. Gregarious, tough. Very changeable. 

 There is a form with the stem attenuated and becoming ferruginous down- 



