﻿A TKINSON—COPRINUS 



distance, and also because of adnate or adnexed gills the salients arise from 

 upper part of stem as well as from pileus; X40. 



Fig. 40.— Tangential section, very close to stem, of a basidiocarp with 

 adnate gills; over middle portion the dark bars are gill origins attached to stem 

 as well as to pileus, that is, they grew out from upper surface of stem as well 

 as downward from pileus; farther toward margin of pileus the margins of 

 gills are just beginning attachment to stem surface; X40. 



Fig. 41.-— Section transverse to stem of older basidiocarp, showing method 

 of attachment of gill margins to stem; note interlocking of marginal cells of 

 gills with loose fundamental plectenchyma on stem; X215. 



Fig. 42. — Slightly older stage, also transverse to stem, showing inter- 

 locking of marginal cells and fundamental plectenchyma on stem surface; 



Fig. 43.— Older stage; section transverse to stem; margins of gills well 

 attached; note rather broad zone of fundamental plectenchyma between gill 

 margins and distinctive stem tissue; X215. 



Fig. 44.— Still older stage; section transverse to axis of stem; paraffin 

 ribbon slightly overheated to cause gills to separate from stem; note gills 

 bound closely together by hymenial surfaces; in one gill original palisade cells 

 still extend over margin; in others they are spread laterally; portions of 

 fundamental plectenchyma cling to gill margins; broad zone of fundamental 

 plectenchyma on distinctive stem surface; X215. 



Fig. 45. — Portion from same ribbon not overheated; note hymenial sur- 

 faces (deeply stained) closely joined; loose mesh of trama; in center large 

 cystidium which arises from middle of trama and projects into hymenium of 

 adjacent gill; X215. 



PLATES XXI I 



Figs. 46-71.— Coprinus micaceus. 



Fig. 46.— Section of young basidiocarp parallel with axes of stem and 

 nearly median, showing weak annular gill cavity; very distinct blematogen 



Fig. 47.— Same, but section near surface of stem, showing very young 

 lamellae cut obliquely; general gill cavity below margin of salients, some of 

 latter still connected with a few loose threads of fundamental plectenchyma; 



Fig. 48 —Median longitudinal section of slightly older basidiocarp; sec- 

 tion between gills on each side so that cavity appears larger; X65. 



Fig. 49. — Section of same basidiocarp and near that shown in fig. 48, 

 but through gills on each side so that full width of gills is shown; weak general 

 annular cavity between margin of gills and surface of stem, with scattered 

 threads of shredded fundamental plectenchyma extending across cavity; 

 in figs. 48 and 49 note blematogen zone enveloping pileus and stem; X65. 



Fig. 50.— Tangential section of same basidiocarp just in angle where stem 

 and pileus join; gills in middle adnate to stem, giving appearance of margins 



