360 



THE BASIDIOMYCETES 



treatises are comprehensive, for example, those of Gibson (1895), 

 Atkinson (1900), Kauffman (1918), xMurrill (1910-1916, 1914- 

 1932), Rea (1922), Giissow and Odell (1927), Lange (1934), 

 and Krieger (1936). Many other very useful papers are mono- 

 graphs of individual genera, such as those by Burlingham (1908) 

 on Lactarius, by Coker (1917) on Amanita and Amanitopsis and 



Adnexed 



Fig. 142. Diagrams representing the manner in which gills of mushrooms 

 ^ mav be attached to the stipe. 



(1922) on Laccaria and Clitocybe, by Beardslee (1918) on Rus- 

 sula, by Coker and Beardslee (1921) on Collybia, and by Over- 

 holts (1927) on Phohota. 



Amonor the agarics none has greater interest to mycolomsts 

 than Coprinus, pilei of which deHquesce during discharge of 

 spores. The pilei, especially of the larger species, are campanu- 

 late. Buller (1910) demonstrated that the gills undergo auto- 

 digestion upward from the lower rim of the pileus. The gills 

 are propped apart by cystidia. The basidiospores mature pro- 

 gressively upward from the lower pilear margin and are dis- 

 charged, falling free in the interlamellar spaces. The gills and 



