BOLBITIUS. 207 



branaceous, plicate, pale yellow, deepest in the centre, and 

 smooth. Lamellae distant, pale, at length brown-red or 

 flesh-colour, narrow, mottled. Stipes scarcely more than a 

 line thick, 3-4 in. long, hollow, weak, yellow. A very 

 elegant species, possessing, according to Withering, a strong 

 and disagreeable smell. (Grev.) 



Bolbitius rivulosus. B. & Br. 



Pileus about 1| in. across, campanulate, striate, rivulose, 

 dingy tan-colour; flesh white, rather thick at the disc, 

 elsewhere membranaceous ; gills narrowed behind, slightly 

 adnexed, rather distant, about H line broad, cinnamon; 

 stem about 3 in. long, 3 lines thick at the base, gradually 

 attenuated upwards, straight, smooth, even, white, hollow ; 

 spores elliptic-oblong, ferruginous, 10-12 X 6-7 p.. 



Bolbitius rivulosus, Berk. & Broome, Ann. Nat. Hist., n. 

 1773; Cke., Hdbk., p. 236; Cke., Illustr., pi. 928u. 



In an orchid house. 



Distinguished by the dirty tan-coloured pileus striate 

 half-way up. Possibly an introduced species. 



Bolbitius niveus. Mass. 



Pileus about 1 in. across, rather fleshy, campanulate, 

 obtusely umbonate, smooth, slightly viscid, margin striate, 

 pure white ; gills narrowed behind and quite free, about 

 1 line broad, rather distant, broadest in front, pallid then 

 salmon-colour ; stem about 4 in. long, clavato-bulbous at the 

 base, gradually attenuated to the apex, rather tough, shining, 

 pure white, hollow; spores elliptical, salmon-colour, 18 x 

 9-10 p.. 



Bolbitius conocephalus, Bull., Cke., Hdbk., p. 378; Cke., 

 Illustr., pi. 1160. 



On the ground in the palm-house, Kew. Eeadily known 

 by the pure white pileus and stem. Certainly not the 

 species intended by Bulliard. In all probability an exotic 

 species, introduced with soil. 



Bolbitius tener. Berk. 



Pileus exceedingly delicate, elongato-conical, ^-1 in. long, 

 not expanding, even, smooth, moist, yellowish-white; gills 

 attenuated behind and nearly free, narrow, not crowded, 

 salmon-colour; stem variable in length, l|-3 in. high, about 



