The stem is long, straight, shining, white, thickened downward, ring distant, top somewhat striate, bulbous at the base. The spores are broadly elliptic-fusiform, black, opaque, 10×7µ.
It is found on dung from May to October. It is not poisonous.
Bolbitius. Fr.
Bolbitius is from a Greek word meaning cow-dung, referring to its place of growth.
The pileus is membranaceous, yellow, becoming moist; gills moist but not deliquescing, finally losing their color and becoming powdery; stem hollow and confluent with the hymenophore. As the generic name implies the plant usually grows on dung, but sometimes it is found growing on leaves and where the ground had been manured the year before. The spores are of a rusty-red color.
Bolbitius fragilis. (L.) Fr.
Fragilis means fragile.
The pileus is membranaceous, yellow, then whitish, viscid, margin striate, disk somewhat umbonate.
The gills are attenuated, adnexed, nearly free, ventricose, yellowish, then pale cinnamon.
The stem is two to three inches long, naked, smooth, yellow. The spores are rust-colored, 7×3.5, Massee. 14–15×8–9µ. Saccardo.