In this genus occurs the famed M. oreades, the Mousseron of France, the Champignon and Scotch bonnet of England, the Fairy-ring mushroom of America.

ANALYSIS OF TRIBES.

Collybia (inclining to Collybia). Page [223].

Flesh of pileus pliant, at length rather leathery, grooved or wrinkled, margin incurved at first. Stem somewhat cartilaginous; mycelium woolly, absent in some species.

A. Scortei (scorteus, leathery). Page [223].

Stem solid or stuffed, then hollow, fibrous within, outside covered with down. Gills separating from the stem, free.

[*] Base of stem woolly or strigose.

[**] Stem naked at the base, often interwoven with twisted fibers.

B. Tergini (terginus, leathery). Page [225].

Stem rooting, distinctly tubular, not fibrous, distinctly cartilaginous. Gills receding then free. Pileus thinner than in the preceding group, hygrophanous, even or with the margin striate.