Bolbitius luteus (Peck) Watling 1981

Pluteolus luteus Peck, Bull. Torrey Club 22: 203. 1895
Pileus thin, very fragile, at first subovoid, then convex or subcampanulate, gregarious, 2-3.5 cm. broad; surface glabrous, viscid, yellow, margin slightly striate; lamellae numerous, crowded, free or but slightly adnexed, yellowish, becoming ferruginous; spores ellipsoid, 10-12.5 X 6-7.5 /z; stipe slender, hollow, slightly thickened toward the base, yellowish, the apex striate and sprinkled with mealy particles, 3.5-7.5 cm. long, 2-4 mm. thick.
Type locality: Pasadena, California.
Habitat: Under trees on decaying manure and in grass.
Distribution: California.