106 AGARICUS. 



Collybia. 159. Hym. Eur. p. 119. Icon. t. 68. /. i. Berk. Out. p. 117. C. Hbk. n. 

 149. Illust. PL 144. B. S. My col. Scot. n. 120. 



214. A. tuberosus Bull. Pileus4-8 mm. (2-4 lin.) broad, white, 

 slightly fleshy, convex then plane, umbonate but not umbilicato-de- 

 pressed, slightly silky then becoming smooth, even, opaque. Stem 

 12 mm. (yz in.) or more long, i m. ()4 lin.) thick, somewhat fis- 

 tulose, commonly ascending, equal, obsoletely pulverulent, white, 

 rarely rufescent, the base wholly smooth, attached to a tuber. 

 Gills adnate, crowded, thin, unequal, slightly ventricose, white. 



Very small, but tough, slightly firm, gregarious. Always growing on a 

 tuber, which is solid, smooth, sclerotioid, becoming yellow. The stem is often 

 elongated, sometimes proliferous. It is often difficult to detect the internal 

 tube of the stem from its thinness. 



On dead Agarics, and Polyporus squamosus. Common. Aug.- 

 Nov. 



The summer form has no tuberous root ; later in the year the tuber is 

 formed, which produces its pileus the following season. B. & Br. Spores 

 3x2 mk. W. G.S. Name tuber, a tuber. Tuberous-rooted. Bull. t. 256. 

 Fr. Monogr. p. 160. Hym. Eur. p. 119. Berk. Out. p. 117. B. &> Br. n. 

 1205*. C. Hbk. n. 150. Illust. PI. 144. a. S. Mycol. Scot. n. 121. Grev. 

 t. 23. FL Dan. t. 1613. Quel. t. 3. / 5. Batschf. 93. 



215. A. racemosus Pers. Pileus somewhat membranaceous, 

 convex, papillate, somewhat tomentose-grey. Stem somewhat 

 stuffed, racemose with .57V/2^/(unbranched) small-headed hairs, the 

 sclerotioid base black. Gills adnate, crowded, white. 



Of the same stature as A. tuberosus from which it differs in the sclerotioid 

 tuber being larger, irregularly shaped, and black, in the stem being somewhat 

 stuffed, in a wholly peculiar manner racemose with simple, equally long, small- 

 headed hairs, 2.5 cent, (i in.), and not pruinose, and in the pileus being 

 thinner, papillato-convex, slightly grey-villous and of a grey colour in all its 

 parts except the gills which are white. The small heads on the stem resemble 

 Stilbum. 



On the ground, and rotten fungi. Very rare. King's ClifFe. 



It turns black in drying. M.J.B. Name racemus, a cluster. Pers. Disp. 

 t. 3-f. 8. (Nees. f. 190). Fr. Hym. Eur. p. 119. Monogr. i. p. 160. Berk. 

 Ozit. p. 118. C. Hbk. n. 151. Sow. t. 287. A. globulifer Brand. Cr. Ag. t. 

 6./. 6, 7. 



III. L^VIPEDES. 



* Gills broad, lax, commonly more or less distant. 



216. A. collhms Scop. Pileus 2.5-5 cent - O" 2 in -) broad, be- 

 coming pale-fuscous or pale-tan, fleshy-membranaceous, campan- 

 ulate then expanded and when flattened umbonate, smooth, some- 

 what viscous and slightly striate when moist, when dry even, shin- 



