Conocybe apala is a extremely fragile lawn mushroom that appears after dew and often collapses by midday. It is saprotrophic, has a pale conical cap, rust-brown spores, and the lecythiform cystidia typical of Conocybe. Appears after rain or heavy dew, especially in warm, muggy weather. Fruits early morning and often collapses by midday.
Cap: 10-45 mm wide; conical to bell-shaped, sometimes drooping with age.
Whitish to creamy-buff, sometimes with a slightly darker centre.
Finely lined (striate) at the margin; surface smooth and dry.
Gills: Adnexed or free, close to crowded.
Start pale, quickly turning cinnamon-brown as spores mature.
Often deliquesce or collapse in hot, humid weather.
Stipe: 70-110 mm x 1-3 mm; very thin, hollow, extremely fragile.
Whitish to faintly yellowish, sometimes with tiny hairs near the apex.
No ring.
Common name: White Dunce Cap.
Habitat: Saprotrophic on lawns, meadows, pastures, parks, compost, and woodchips.
Substrate: Ground.
Distribution: Cosmopolitan.
Season: Spring.
Biostatus: Exotic.
Edible: Toxic,cause severe gastrointestinal distress.
Spore print: Cinnamon-brown to reddish-brown.