LEUCOSPORI. 10 1 



pallid. Gills slightly adnexed, crowded^ somewhat linear, scarcely Collybi 

 serrulated, at length spotted-rubiginous. 



Gregarious. Intermediate between A. fusipes and A. butyraceiis. It is 

 nearest to the former, but most like the latter. Very distinct in the broad, 

 lax pileus, in the thinner, twisted, pallid stem, and in the spotted gills. 



On roots of trees. Bowood, 1869, &c. Oct. 



Spores sphaeroid-ellipsoid, 8-10x4-5 mk. K. Name distorqueo, to twist. 

 From the twisted stem. Fr. Monogr. i. /. 150. Hym. Eur. p. 113. Icon. t. 

 63. /. i. B. dr 1 Br. n. 1205. C. Illust. PL 282. 



202. A. butyraceus Bull. Pileus 5-7.5 cent. (2-3 in.) broad, 

 normally rufous-brown, but becoming pale, fleshy, convex then 

 expanded, more or less umbonate, dry, even, smooth ; flesh buttery- 

 soft, somewhat hygrophanous, flesh-colour then white. Stem 5-7.5 

 cent. (2-3 in.) long, conico-attenuated from the thickened white- 

 tomentose base, hence much thinner at the apex, 4-6 mm. (2-3 lin.) 

 only, but at the base 1-2.5 cent. (>-i in.) thick, externally covered 

 over with a rigid cartilaginous cuticle, internally stuffed with soft 

 spongy pith, or hollow only when old, striate, rufous, commonly 

 smooth, but varying with white deciduous squamules, and occa- 

 sionally wholly pulverulento-villous. Gills slightly adnexed, 

 somewhat free, thin, crowded^ crenulate, white, never spotted- 

 rufous. 



The colour of the pileus is both changeable and variable ; also fuscous-livid, 

 becoming pale - ochraceous, or becoming wholly pale-white. Solitary or 

 growing in troops. 



In woods, chiefly fir. Common. Jan.-Dec. 



When quite young livid-brown, the margin subrufescent, but a portion below 

 the umbo soon grows pale, so that the pileus appears of four colours. Easily 

 distinguished by its greasy-looking pileus and cartilaginous stem. M.J.B. 

 Umbo persistently dark. On making a section, a coloured line will be observed 

 extending from the base of the stem (cuticle rufous) to the margin of the pileus. 

 Spores 6-10x3-5 mk. B. Name btityrum, butter. Buttery to the touch. 

 Bull. t. 572. Fr. Monogr. i. p. 151. Hym. Eur. p. 113. Berk. Eng. Fl. v. 

 /. 46. Out. p. 115. C. Hbk. n. 142. Illust. PL 143. S. Mycol. Scot. n. 114. 

 Buxb. C. iv. t. 5./. i. Batt. t. 16. c. A. leiopus Pers. Ic. pict. 2. f. 1-3. 



203. A. xylophilus Weinm. Pileus as much as 7.5 cent. (3 in.) 

 broad, (10 cent, 4 in., when flattened), whitish or becoming fus- 

 cous-tan at the middle, slightly fleshy, wide, spreading, campanu- 

 late, lax, commonly obtuse, sometimes furnished with a minute 

 umbo ; at length rimosely split towards the margin and more ex- 

 panded, broadly gibbous, smooth, moist; flesh everywhere very 

 thin, fragile, becoming watery-fuscous. Stem 5-7.5 cent. (2-3 in.) 

 long, 6 mm. (3 lin.) thick, hollow, equal, but often flexuous, fibril- 

 loso-striate, whitish, quite destitute of a veil, internally becoming 



