550 



COMPARATIVE MORPHOLOGY OF FUNGI 



a gel. The cells are binucleate, the terminal cells become pyriform, 

 the dicaryon fuses, the diploid nucleus divides twice with more or less 

 longitudinal spindles. The basidia are two celled. After the first 

 division a single septum forms and one nucleus slips into the basidiospore 

 while the other degenerates (Fig. 367, 2 to 7). 



Pilacrella Solani is rather better developed, the caps becoming fleshy 

 discs while the fertile layer contains long sterile periphyses which extend 

 above the basidia. 



Hoehneliomyces shows the step from gymnocarpous to angiocarpous 

 development. H. delectans (Pilacrella delectans) on fallen leaves and 



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Fig. 368. — Hoehneliomyces delectans. 1. Head of fructification. 2. Fructification in 

 artificial culture before formation of head. (1 X 46; 2 X 6; after Moller, 1895.) 



stems of Euterpe oleracea in Brazil (Moller, 1895), forms a small watery 

 irregular knob of hyphae on the substrate. From this arises a hyaline 

 stipe formed of parallel hyphae which grow out below in all directions, 

 giving the stipe a hairy covering (Fig. 368, 1). At the base of the cap, 

 the peripheral hyphae are much branched, growing outward, then bending 

 toward each other like a calyx. The central hyphae of the stipe, within 

 this calyx, develop basidia at their tips. The basidiospores are not 



