TBICHOLOMA 235 



thin, 4-6 mm. broad. Flesh white, bistre under the cuticle. Spores 

 white, elliptical, 7-9 x 5-6 JJL, minutely punctate. Cystidia lanceolate 

 subulate, 25-30 x 4-6 /z, apex shaggy, 3/j, in diam. Taste pleasant. 

 Edible. Heaths, and downs. Aug. Oct. Uncommon, (v.v.) 



689. T. album (SchaefE.) Fr. Album, white. 

 Entirely white, or becoming yellowish at the disc. P. 5-12 cm., fleshy, 



convex, then flattened, becoming plane, obtuse, very dry, smooth; 

 margin at first incurved, floccosely striate over the base of the gills. St. 

 7-8 x 1-1-5 cm., elastic, attenuated upwards, subbulbous, apex 

 slightly mealy. Gills emarginate, somewhat crowded, 8 mm. broad. 

 Flesh white, thick, not compact, fibrous in the stem. Spores white, 

 broadly elliptical, 6 x 4-5 /*, 1-guttulate. Smell pleasant, taste bitter. 

 Poisonous. Mixed woods. Sept. Nov. Not uncommon, (v.v.) 

 var. caesariatum Fr. Caesariatum, covered with hair. 



Differs from the type in being more slender, and in the silky fibrillose 

 p. Shady beech woods. Sept. Oct. Uncommon. 



690. T. leucocephalum Fr. Barla, Champ. Alp. Marit. t. 33, figs. 8-13. 



Xeu/co?, white; ice$a\ri, head. 



P. 3-6 cm., white, disc sometimes becoming ochraceous, fleshy, thin, 

 tough, convexo-plane, obtuse, or often umbonate, moist, smooth, 

 when young covered with shining whitish, adpressed silky, at length 

 separating villous down; margin acute, spreading, smooth. St. 4- 

 6 cm. x 5-10 mm., white, subcartilaginous, polished, twisted, smooth, 

 rooting at the attenuated base. Gills shining white, rounded-free, 

 crowded, thin. Flesh watery, becoming whitish, thin, compact. Spores 

 white, ovoid, 6-7 x 4-6/z, minutely echinulate, 1-guttulate. Smell 

 pleasant, of new meal. Deciduous woods. Aug. Oct. Uncommon. 



(b) GiUs discoloured. 



691. T. acerbum (Bull.) Fr. (= Tricholoma nictitans Fr. sec. Quel.) 



Barla, Champ, t. 44, figs. 1-5. Acerbum, bitter. 



P. 7-12 cm., yellowish buff, becoming rufous at the disc, fleshy, con- 

 vexo-expanded, smooth, moist; margin involute, viscid, tomentosely 

 ribbed over the base of the gills. St. 5-9 x 2-3 cm., white, becoming 

 yellowish, apex white, mealy, base generally bulbous, sometimes 

 attenuated. Gills pallid, then rufescent, emarginate, crowded. Flesh 

 white, compact, firm. Spores white, globose, 3-Afj,. Smell unpleasant, 

 taste bitter. Edible. Woods and downs. Aug. Oct. Not un- 

 common, (v.v.) 



692. T. luteocitrinum Rea. Trans. Brit. Myc. Soc. in, t. 8. 



Luteus, yellow; citrinus, citron. 



P. 2-7 cm., bright yellow, fleshy, campanulate, then expanded and 

 gibbous, floccose, soon breaking up into adpressed, small squamules, 



