420 PSATHYRELLA 



slightly and pellucidly striate only round the margin. St. 6-8 cm. x 

 23 mm., whitish, remarkably tense and straight, fragile, equal, smooth, 

 naked, base white villose. Gills whitish, then cinereous-blackish, wholly 

 adnate, commonly broader behind, rarely linear, subdistant, edge rose- 

 coloured. Flesh white, thin. Spores black, oblong elliptical, 11-14 x 

 5-6'5/M. Cystidia on edge of gill abundant, fusiform, or cylindrical, 

 apex obtuse, 5-9/u. in diam., base subventricose, 36-50 x 8-16/x. 

 Gregarious. Woods, hedgerows, waysides, and wood heaps. May 

 Dec. Common, (v.v.) 



1350. P. hiascens Fr. (= Coprinus hiascens (Fr.) Quel.) Cke. Illus. 

 no. 636, t. 635. Hiascens, splitting. 



P. 2-3 cm., livid, then becoming yellow, membranaceous, conico- 

 campanulate, 2-5 cm. high, obtuse, smooth, soon split and opening in 

 furrows often to the middle, the divided margin at length revolute. 

 St. 4-7*5 cm. x 23 mm., whitish, tense and straight, rigid-fragile, 

 naked, smooth. Gills whitish, then shining black, at length very dead 

 black, adnate, narrow, linear, or somewhat attenuated in front, 

 distant. Flesh white, very thin at the margin. Spores black, "wedge- 

 shaped-rounded, 10-12 x 7-11 /x" Karst. Grassy places, hedgerows, 

 damp woods, and rubbish heaps. April Nov. Rare. 



1351. P. arata Berk. Cke. Illus. no. 637, t. 636. dpoco, I plough. 

 P. 2 cm., bright brown, membranaceous, campanulato-conic, 2-5 cm. 



high, rather acute, deeply sulcate. St. 12-5 cm. x 2-3 mm., white, 

 thickened at the base, smooth. Gills purplish black, quite free, lanceo- 

 late. Flesh concolorous at the disc, thin at the margin. Under hedges. 

 Sept. Oct. Rare. 



1352. P. trepida Fr. Fr. Icon. t. 139, fig. 2. Trepida, trembling. 

 P. 23 cm.., fuliginous, disc date brown, membranaceous, very fragile, 



campanulate, obtuse, smooth, slightly but densely striate up to the 

 even disc. St. 6 7'5 cm. x 12 mm., whitish, diaphanous, equal, tense 

 and straight, rarely flexuose, quite smooth, naked. Gills greyish, then 

 fuliginous shining black, adnate, crowded, ventricose, very thin. Flesh 

 brownish in the p., very thin. Spores dead black, "elliptical, 12-14 x 

 6-7 ju,, smooth, opaque. Cystidia on edge of gill fusiform, 40-50 x 

 9-10/u," Rick. Muddy marshes, and on twigs in woods. July Oct. 

 Uncommon, (v.v.) 



1353. P. hydrophora (Bull.) Fr. (= Coprinus hydrophorus (Bull.) 

 Quel.) Bull. Hist. Champ. Fr. t. 358. 



vBcop, water; <f>epw, I bear. 



P. 2-3 cm., rufescent, becoming greyish towards the margin, sub- 

 membranaceous, conico-campanulate, disc broad, obtuse, smooth, at 

 length expanded and revolute; margin striate, at first appendiculate with 

 the fugacious veil. St. 6-7-5 cm. x 2-3 mm., white, fragile, straight, 



