BOLBITIUS. 363 



tant when the pileus is split, 2 mm. (i lin.) broad, alternate, at first Boibitius. 

 purplish, then fuscous-flesh-colour. 



Very tender and fragile, smooth, tremulous-wavering, soon wasting away. 

 Among grass in rich manured soil, c. Common. May-Oct. 



Pileus yellow, but soon presenting the salmon-tint of the gills, M.J.B. 

 Spores 8 x 4 mk. If". G.S. Name titubans, shaking. Wavering-tremulous. 

 Fr. Monogr. \. p. 471. Hym. Eur. p. 334. Berk. Oiit. p. 182. C. Hbk. n. 

 483. S. Mycol. Scot. n. 443. Agaricus Bull. t. 425. SOT.U. t. 128. 



5. B. apicalis Smith. Pileus 18 mm. (^ in.) high, brown, disc 

 ochraceous, membranaceous, striate from the first then plicate, 

 liable to split, disc somewhat fleshy, obscurely umbonate. Stem 

 about 5 cent. (2 in.) long, hollow, striate, white, minutely pruin- 

 ose under a lens. Gills somewhat broad, ventricose, free, at first 

 pressed to the stem, brown. 



The difference in colour between the two parts of the pileus is denned by a 

 distinct line. 



In pastures. Staplehurst. Early summer. 



Spores 9x6 mk. II'. G.S. Name fro~i the singularly denned apex. Smith 

 in C. Hbk. n. 484. Fr. Hym. Eur. p. 334. 



6. B. tener Berk. Pileus white, moist, conical, elongated. 

 Stem white, bulbous at the base. Gills attenuated behind, near- 

 ly free, salmon-coloured. 



Very delicate. At first looking like a dry specimen of A. tener. 

 On lawn and rich ground. Uncommon. Sept. 



Stem as much as 5 cent. (2 in.) long, not distinctly bulbous. Pileus, in 

 specimens I have seen, flesh-colour then whitish, Fr. Spores 12 x 5 mk. \V.P. 

 Name tener, tender. Berk. Out. p. 183. /. 12. f. 2. C. Hbk. n. 485. . 

 Mycol. Scot. n. 444. Fr. Hym. Eur. p. 335. Icon. t. 130. f. 4. Bolb. 

 albipes Fr. Monogr. \\. p. 306. 



7. B. rivulosus B. & Br. Pileus about 4 cent. (\ l / 2 in.) broad, 

 tan-colour, campanulate, rivulose. Stem attenuated upwards. 

 Gills narrow, cinnamon. 



Very different from any other known species. 

 On earth in an orchard house. Chiswick, 1876. July. 



Name rivula, a small stream. From the rivulose pileus. B. er Br. 

 n. 1773- 



