Leucoagaricus rubrotinctus (Peck) Singer 1948

Lepiota rubrotincta Peck, Ann. Rep. N. Y. State Mus. 44:
179. 1892.
1
Agaricus rubrotinctus Peck, Ann. Rep. N. Y. State Mus. 35: 155. 1884. Mastocephalus carneo-annulatus Clem. Bot. Survey Neb. 4: 17. 1896.
Pileus thin, convex to subplane, usually umbonate, 2-8 cm. broad; surface light-red to purple, the cuticle at first continuous, later cracking radially except on the umbo and sometimes finally breaking up into appressed scales; lamellae free, close, broad, rounded, white or slightly tinged with yellow; spores ellipsoid, smooth, hyaline, appendiculate, uniguttulate, 7-12X3-6 ju; stipe equal, slightly enlarged at the base, white or with a rosy tint, glabrous or silky-fibrillose, hollow, 3-9 cm. long, 4-6 mm. thick; annulus membranous, usually persistent, entirely white or with a pink margin.
Type locality : New York.
Habitat: Among leaves in thin woods or the borders of woods.
Distribution: New England to Nebraska and south to the Gulf of Mexico.

Leucoagaricus rubrotinctus is a widespread species of fungus in the family Agaricaceae. It was described as new to science in 1884 by American mycologist Charles Horton Peck as Agaricus rubrotinctus. Rolf Singer transferred it to the genus Leucoagaricus in 1948. The fungus may be a complex of several closely related species. It is inedible.

The cap is reddish brown and convex to flat. The margin splits and causes lines of the whitish flesh to darken. The gills are white and do not stain. The stipe is whitish and enlarged at the base, with a fragile ring.