corydalina, commonly known as the greenflush fibrecap, is a member of the genus Inocybe which is widely distributed in temperate forests.

corydalina is widespread across Europe and the British Isles.

It usually fruits in the fall under deciduous trees but can also be found under conifers.

Gurevich and Nezoiminogo reported that this mushroom contains the mycotoxin muscarine but no psilocybin; other researchers have been unable to confirm this result.

Chemical analysis by Stijve and Kuyper shows that it contains 0.032% psilocybin, a very low concentration.