This small, delicate, buff, parasol-like agaric grows solitary or scattered on soil in lawns and other short grass.
buff, more cinnamon at the centre and later with gray tinge at the margin. The shape is ovoid at first, becoming convex or bell-shaped, then flat and finally shallowly convex like a parasol. Gills
pallid clay, soon grey and finally black; free from the stem; close or nearly distant. Stem
white or buff, equal above a slightly swollen base; fragile; hollow; bald or very finely silky. The mushroom has no ring.
Coprinus auricomus tends to be a bit bigger and has browner cap. A microscope reveals thick-walled brown hairs, confirming it's identity. Other similar species include Coprinus keuhneri, Coprinus leiocephalus and Coprinus nudiceps. They can be distinguished only by carefully measuring the spores.
on the MushroomExpert.Com Web site.