Cap: 19-30 mm in diam., conic to subconvex or subumbonate,
sometimes becoming plane or depressed at the disc. Even and glabrous,
marked with translucent striations when moist, lubricous or subviscid,
hygrophanous. Color reddish-brown or chocolate-brown to pale ochre. Blackish
when old and staining blue in young specimens when handled.
Gills: Adnate or adnexed to sinuate. Brownish-violet to blackish-violet
with white floccose edges.
Stem: 40-90 x 1.3 mm. Equal but sinuous and flexuous, hollow,
reddish-brown or brownish, fading to blackish. Densely fibrillose floccose
from whitish appressed fibrils. Turning Blue where cut or injured.
Spores: (4.9-) 5.5-6.6 (-7.7) x 4.4-5.5 (-6) x 3.5-4.4 µ. Subrhomboid or
rhomboid in the front and subellisoid from the side, thick walled and with a distinct germ pore.
Habitat: Solitary or gregarious on soil or near trails.
Distribution: In tropical virgin rain forests. Known only from Mexico (Uxpanapa region).
Season: During the summer rains.
Comment: According to Guzmán, many fungi from the tropical virgin rainforests are almost lost. The vegetation for this and other similar species are almost destroyed throughout Mexico. The very area where this species was collected by Guzmán and Dr. A. L. Welden in 1976 was completely overturned in 1978 and is now a subagricultural land and meadow lands region. The name of this species is for the type locality.