516 COPRINUS 



1697. C. sociatus Fr. (= Psathyrella crenata (Lasch) Fr. sec. Rick.) 



Sociatus, gregarious. 



P. 3-6 cm., fuscous, then becoming pale, disc date brown, even, and 

 umbilicate, very tender, ovali-cylindrical, then expanded, densely split 

 into furrows, the raised ribs slightly scurfy. St. 4-6 cm. x 12 mm., 

 white, delicately attenuated from the base, smooth. Gills grey, then 

 cinereous black, adnexed in the form of a ring, attenuated behind, 

 slightly ventricose. Flesh very thin. Spores " brownish black, ovate- 

 oval, 12 x 1[i. Cystidia somewhat bottle-shaped with a broad neck, 

 20-25 JM broad" Lange. Damp ground in gardens, old walls, and 

 woods. July Oct. Uncommon. 



1698. C. plicatilis (Curt.) Fr. Cke. Illus. no. 674, t. 686, fig. A. 



Plicatilis, folded. 



P. 1-3 cm., fuscous, then bluish-grey-cinereous, disc darker, fuscous 

 or rufescent, ovali-cylindrical, then campanulate, soon expanded, 

 opening into furrows, sulcato-plicate, for the most part smooth, disc 

 broad, even, at length depressed. St. 2-5-7-5 cm. x 1-2 mm., pallid, 

 somewhat pellucid, equal, smooth. Gills cream colour, then grey, at 

 length grey-blackish, remote from the st., and adnate to a collar formed 

 by the dilated apex of the st., distant. Flesh whitish, very thin. Spores 

 black, broadly elliptical, 10-12 x 8-9/z. Cystidia vesiculose, 60- 

 85 x 25-35/a. Woods, pastures, roadsides, and gardens. April Dec. 

 Common, (v.v.) 



1699. C. curtus Kalchbr. (= Coprinus plicatiloides Buller.) Lange, 

 Dansk. Bot. Ark. bind 2, no. 3, t. 1, fig. h. Curtus, short. 



P. -5-1-5 cm. broad, 3-8 mm. high, foxy-red, or rufescent to tan colour 

 at first, becoming grey to dark grey, disc tan coloured, oval, to cylindrical, 

 or elliptical, then expanded and flattened with a strongly depressed 

 disc, splitting along the lines of the gills and becoming plicate, bearing 

 a certain number of minute, scattered, flaky, separable, rufescent or 

 whitish scales, consisting of globose, angular, or elliptical cells, often 

 in chains, 12-30jt in diam., some brown and some colourless, not 

 ornamented with crystals of calcium oxalate, the pileus also villose 

 or downy with many colourless hairs, 70-100 x 5/x, enlarged at the 

 apex where minute drops of a clear fluid are exuded under moist 

 conditions. St. 28 cm. x 1-2 mm., white, becoming stained with dull 

 yellow, equal, smooth, hollow. Gills grey, then black, at first attached 

 to the stem by the margin for its entire length, then adnexed, and 

 finally free, linear, narrow ; margin, before autodigestion begins, slightly 

 divided, fimbriate. Flesh white, thin. Spores black in the mass, dark 

 brownish to black under the microscope, elliptical, 9-15 x 6-9/z. 

 Cystidia on gill surface none. Horse dung. Sept. Oct. Uncommon. 

 (**) 



