COPRINUS PLICATILIS 



45 



The cystidia on the sides of the gills (pleurocystidia), in an 

 unexpanded pileus, stretch nearly or completely across the inter- 



Fig. 29. — Coprinus plicatilis. A, a camera-lucida drawing showing 

 the disposition of the spores and tlie appearance of a cystidium 

 on the surface of a gill as seen in a surface view. The basidia 

 are trimorphic : a (shaded black), the spores of the long basidia ; 

 b (cross-hatched), the spores of the basidia of medium length ; 

 and c (shaded with jiarallel lines), the spores of the short basidia. 

 The spores a and b, in several places, stand over the spores c. 

 The cystidium d was seen on another part of the hymenium. 

 At B, C, and D, the spores of the long basidia, the intermediate 

 basidia, and the short basidia respectively have been set out. 

 Fruit-body obtained at Birmingham, England. Magnification. 

 42G. 



lamellar spaces ; but their apices are not united to the paraphyses 

 of the opposing gill, so that the pleurocystidia of Coprinus 'plicatilis 

 differ from those of C. atramentarius and C. lagopus in that they do 

 not lock adjacent gills together (Fig. 24, p. 41). However, they 



