* * 



220 



BOTANICAL GAZETTE 



[SEPTEMBER 



Fig. 67. — Detail from fig. 61, showing progressive differentiation of hyphae 

 from primordial hymenophore into pileus margin; X158. 



Fig. 68. — -Tangential section of fruit body of fig. 65, showing developing 

 cystidia; X34. 



Fig. 69. — Detail from fig. 68; X158. 



PLATE XXII 



* 



Inocybe geophylla 



Fig. 70. — Longitudinal sections of young buttons; X34. 



Fig. 71. — Median section in which pileus and stem fundaments are out- 

 lined within a 2-layered blematogen; X34. 



Figs. 72, 73. — Median and tangential sections of fruit body in which 

 primordium of hymenophore is appearing; X34. 



Figs. 74-76. — Median and tangential sections of older fruit body in which 

 palisade layer has become organized and first gill salients are appearing; X34. 



Figs. 77, 78. — Median and tangential sections of older fruit body; X34. 



Figs. 79-81. — Older fruit body in which gills are nearly mature and on 

 which cystidia have developed; duplex universal veil still present over whole 

 fruit body; X34. 





