﻿ATK/XSUX-uU'lUXIS 



much the same situation as is presented by my fig. 50, except 

 that the latter is nearer the stem, so that a few of the lamellae in the 

 middle of the figure are in close contact with the stem. If the gills 

 originated as described by Levine, then they could remain firmly 

 connected with the stem until in age they become free with the 

 expansion of the plant. They would not show during the young 

 stage the loose connection across a weak, general annular gill 

 cavity which is evident from his fig. 8. In fig. 51 the elements of 

 the margins of the primary lamellae are interlocking with the 

 fundamental plectenchyma on the stem surface, better shown 

 in figs. 56-63, more highly magnified. The later stages are shown 

 in figs. 65-67. Fig. 64 is from a section of the entire fruit body 

 at quite an advanced stage of development, when the gills are 

 finally firmly connected with the surface of the stem. The stem 

 here shows a number of lysigenous cavities. Figs. 66 and 67, more 

 highly magnified, from the same basidiocarp, show the close con- 

 nection of the trama with the stem. 



1. General organization or the basidiocarp.— In the young 

 basidiocarps the pileus is organized in the region of the convergence 

 of radially growing hyphae which arise from the apex of the basid- 

 iocarp fundament. The primordium of the pileus also grows in 

 a radial direction, both upward and in a lateral and slightly down- 

 ward direction, over the broad and nearly horizontal surface of 

 the young stem fundament. The growth of the pileus is more 

 rapid in the lateral centrifugal direction, and the hyphae here are 

 richer in protoplasmic content. The zone of radial hyphae envelop- 

 ing the pileus is the blematogen. In Coprinus comatus and C. atra- 

 mcntarius the radial hyphae of the blematogen layer retain their 

 filamentous character and the blematogen is persistent, being 

 concrete with the pileus, and therefore does not separate as a dis- 

 tinct volva or teleoblem. In C. micaceus the radial hyphae of the 

 blematogen change at a very early period into branched chains 

 of oval and globose cells. Profuse disarticulation of the chains 

 takes place, forming a somewhat powdery material on the surface 

 of the pileus. The outer surface layer of the pileus forms a 



