What You Should Know
Contumyces rosellus is a small, white-spored mushroom with an infundibulate cap, striate-sulcate margin, and decurrent gills. Its vinaceous to pinkish-brown hues are an important distinguishing feature. In age, the cap may fade to a nondescript tan, but the gills and stipe usually retain some pinkish color.
Contumyces rosellus Mushroom Identification
0.5-2.0 cm broad, convex, becoming convex-depressed to infundibulate; margin incurved, then decurved to plane, sometimes appearing scalloped in age; surface glabrous, striate-sulcate to near the disc, vinaceous-brown, hygrophanous, fading to pinkish-tan, finally pale-tan; context thin, pallid; odor and taste mild.
Gills long decurrent, close to subdistant, pale-pink, fading to pinkish-cream, pallid at maturity; lamelluae up to three-seried.
1.0-2.5 cm long, 1-3 mm thick, pliant, more or less equal, straight or bent, hollow in age; surface pruinose, becoming glabrous, colored like the cap, i.e. vinaceous to pinkish-brown, paler in age, often nearly tan; whitish tomentum at base; partial veil absent.
9.0-10.5 x 4.5-6 µm, ellipsoid, smooth, inamyloid, contents granular, hilar appendage prominent; spore print white.
Scattered to gregarious in open areas, e.g. along trails and in sparse grass, often in moss; fruiting along the coast from mid-winter to spring; exact distribution unknown but probably widespread; occasional, locally common.
Contumyces rosellus Synonyms
Omphalia rosella J.E. Lange, 1930
Clitocybe rosella M.M. Moser, 1950
Omphalina rosella (M.M. Moser) M.M. Moser, 1953
Gerronema rosellum (M.M. Moser) Singer, 1973
Marasmiellus rosellus (M.M. Moser) Kuyper & Noordel., 1986
Jacobia rosella (M.M. Moser) Contu, 1998
Mycena carnicolor P.D. Orton, 1960
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