Collybia dryophila (Bull.) Fr. 



Oak loving Collybia 



1 Immature plant 



2 Cluster of three plants, two of them immature 



3, 4 Two plants with the pileus more highly colored 



5 Mature plant with the pileus fully expanded 



6 Immature plant with pileus highly colored and stem bulbous 



7 Mature plant with pileus highly colored and stem bulbous 



8 Vertical section of the upper part of an immature plant 



9 Vertical section of the upper part of a mature plant with ex- 



panded pileus 



10 Transverse section of a stem 



11 Four spores, x 400 



164 



