BOLBITIUS 497 



B. hydrophilus (Bull.) Fr. = Hypholoma hydrophilum (Bull.) Fr. 



1626. B. vitellinus (Pers.) Fr. Kalchbr. Icon. t. 19, fig. 2. 



Vitellus, the yolk of an egg. 



P. 2-4 cm., egg yellow, submembranaceous, deeply campanulate, 

 then expanding and convex, viscid, smooth, then furrowed and splitting 

 at the margin. St. 6-11 cm. x 2-4 mm., cream colour, attenuated up- 

 wards from the subbulbous base, covered with white, fugacious, mealy 

 fiocci. Gills ochraceous, then somewhat ferruginous, free, attenuated at 

 both ends, thin, crowded. Flesh yellowish, thick at the disc. Spores 

 ferruginous, yellow under the microscope, broadly elliptical, 12-14 x 

 7-8jU, often truncate at the one end. On horse dung, dung heaps, and 

 amongst grass. May Oct. Not uncommon, (v.v.) 



var. olivaceus Gillet. Olivaceus, olivaceous. 



Differs from the type in its olivaceous colour. Horse dung. Sept. 

 Uncommon, (v.v.) 



1627. B. Boltonii (Pers.) Fr. 



James Bolton of Halifax, the author of " An History of Fungusses." 

 P. 2-4 cm., yellow, becoming pale, disc darker, fleshy, conical, or 

 convex, then plane and depressed at the disc, viscid, smooth, becoming 

 sulcate and splitting at the membranaceous margin, finally withering 

 and becoming like paper. St. 5-8 cm. x 4-6 mm., yellowish, equal, 

 attenuated at the base, often twisted, fiocculose with the fugacious cortina, 

 which sometimes forms a ring-like zone. Gills light yellow, then livid 

 fuscous, slightly adnate. Flesh yellowish, especially in the St., very 

 thin. Spores fuscous ferruginous, broadly elliptical, or pip-shaped, 

 12-13 x 7-8/x. On dung, and manured soil. May Oct. Uncommon. 

 (v.v.) 



1628. B. flavidus (Bolt.) Massee. Cke. Illus. no. 677, t. 689, as Bol- 

 bitius Boltoni Fr. Flavidus, yellowish. 



P. 2-5-5 cm., pale yellow, glutinous, conical, then expanded, disc 

 usually slightly elevated; margin striate, and usually splitting. St. 

 5-6 cm. x 4-6 mm., yellow, slightly thinner upwards. Veil very 

 fugacious, white, leaving no mark on the st. Gills white, then yellow, 

 at length dusky brown, almost or quite free, 4 mm. broad. Flesh yellow 

 in the st. Spores brown, elliptical, 10 x 6/n. The whole plant deli- 

 quescing. Dung-hills, and rotten cloth in woods. June Aug. Un- 

 common, (v.v.) 



1629. B. grandiusculus Cke. & Massee. Cke. Illus. no. 1187, t. 1159. 



Grandiusculus, pretty well grown up. 



P. 3-5 cm., pale yellow, disc rufous, submembranaceous, campanu- 

 late, then expanded, smooth; margin slightly striate. St. 7-5-10 cm. 

 x 6 mm., white, gradually attenuated upwards, straight, smooth. 

 B. B. B. 32 



