United States, Illinois, Coles, 2251 4th Street, Charleston
In grass; scattered; cherry, silver maple, white pine near
The Herbarium of Michael Kuo. VII: 170 Caps to 6 cm; squarish-convex in button stage, expanding to plane; when young densely covered with brown fibrils over a tan background--at maturity tan with brown fibrils and a dark disc; the margin not bruising when rubbed; KOH negative. Gills whitish, then faintly pinkish, eventually Agaricus brown; free; close. Partial veil white, with some tannish cogs; not leaving a ring on the one mature specimen I have, but clinging to the cap margin in one spot. Stem to 6 x 1 cm; equal; the base not swollen; white; smooth to finely fibrillose; not bruising; base not bruising when rubbed. Flesh white unchanging; not yellowing in base. Odor of crushed stem base pleasant but not distinctive; taste mild, not distinctive. 5/24/07: Pileipellis as 09250302; spores and lack of cystidia also parallel. 9/6/07: One FB sent to Kerrigan. 4/7/18: This collection cited by Kerrigan (2016) in protologue for A. bellanniae. Pileipellis a cutis, with some fascicles upright and brown--otherwise hyaline; elements 2.5-10 microns wide, smooth; terminal cells cylindric with rounded apices. Cheilocystidia 24-28 x 7-8 microns; clavate to subcylindric, basidiolelike; smooth; thin-walled; hyaline in KOH. Spores 6.5-8 x 4-4.5 microns; ellipsoid; smooth; thick-walled; brown in KOH. Cited in Mem. New York Bot. Gard. 114:328, 2016.