AGARICINI. 



Bolbitius. The pilei are commonly very irregularly shaped from mutual pressure. 



Very ccespitose, very fragile. Spores ferruginous. 



In woods and on sawdust. Frequent. July-Oct. 



iS T ame vfiwp, water ; <<.'Aos, loving. Moisture-loving, watery. Fr. Hviu. 

 Enr. p. 333. S. Mycol. Scot. 11. 440. Agaricus hydrophilus Bull. t. 511. 

 Fr. Memoir, i. p. 427. B. e Dr. a. 1126. C. Hbk. n. 413. Saund. e 

 '. /. 24. A. stipatus Berk. Bug. Fl. \. p. 113, partly. 



2. B. Boltonii Fr. Pileus yellow becoming pale, slightly 

 fleshy, at first conical, viscous, at first even, then with the mem- 

 branaceous margin sulcate, the darker disc somewhat depressed. 

 Stem attenuated, becoming yellow, at the first flocculose with the 

 fugacious cortina. Gills somewhat adnate, light yellow then be- 

 coming livid-fuscous. 



Spores brown-fuscous. Pileus at length withering and becoming like paper. 

 Distinct from B. fragilis in the cortina being manifest when young, in the 

 darker disc of the pileus being depressed, and in fat gills being somewhat ad- 

 nate and light-yellow-livid then becoming fuscous. 



On clung. Uncommon. May-Sept. 



Spores subsphaeroid-ellipsoid, 14x8 mk. K; 7x5 mk. \V.P. Name- 

 after Bolton. Fr. Hym. Enr. p. 333. Monogr. i. p. 471. Berk. Out. p. 182. 

 C. Hbk. n. 481. S. Mycol. Scof. . 441. Agaricus Bolt. t. 149. 



3. B. fragilis Fr. Pileus 5 cent. (2 in.) broad, light yellow, 

 then becoming pale, somewhat membranaceous, almost pellucid, 

 conical then expanded, somewhat umbonate, smooth, viscous, 

 striate round the margin (which is often crenulated). Stem 7.5 

 cent. (3 in.) long, 2 mm. (i lin.) or little more thick, fistulose, 

 attenuated upwards, naked, smooth (and without a manifest veil), 

 yellow. Gills attenuato-adnexed, almost free, ventricose, yellow 

 then pale cinnamon. 



Spores ferruginous. Thinner than B. Boltonii, &c., very fragile, rapidly 

 withering. 



On dung. Common. June-Sept. 



Spores subsphaeroid-ellipsoid, 14-15 x 8-9 mk. K. Name fragilis, fragile. 

 Fr. Monogr. i. p. 471. Hym. Enr. p. 334. Berk. Out. p. 182. C. Hbk. n. 

 482. 5. Mycol. Scot. ?i. 442. Hoffm. Ic. t. 21. f. 2. A. equestris Bolt. t. 65. 

 Sow. t. 96. 



4. B. titubans Fr. Pileus 2.5 cent, (i in.) or less broad, mem- 

 branaceous, ovato-campanulate when young, even, then flattened 

 and split, diaphanous, slightly viscid, the evened disc light yellow, 

 the paler margin plicate or rufescent-striate. Stem 5-7.5 cent. 

 (2-3 in.) and more long, scarcely 2 mm. (i lin.) thick, fistulose, 

 equal, even, shining, yellowish. Veil none. Gills adnexed, dis- 



