Summary:
Features include 1) a small, fan-shaped, cespitose fruitbody that is vinaceous brown (when dry), and radially wrinkled or fibrillose-wrinkled, 2) entire margin, 3) a spore-bearing undersurface that is usually smooth, 4) a lateral to central stem that is often indistinct, 5) growth on the ground and on small twigs, and 6) fuscous-vinaceous angular-lobate spores with spines. This is an illegitimate name because there was already a Thelephora americana (Peck) Sacc. 1902. The latter is regarded as a synonym of Thelephora anthocephala (Bull.) Fr. in the online Species Fungorum, accessed September 4, 2017. The description here of Thelephora americana Lloyd sensu Corner is derived from Corner except where noted.
Collections were examined from WA, BC, ON, NC, NH, NJ, NY, OH, PA, TN, VA, WI, and WV, (Corner).
Fruiting body:
fan-shaped, ascending then horizontal, caespitose, when dry vinaceous-brown, cap up to 3cm in radius, matte or subtomentose, radially subrugulose to fibrillose-rugulose, margin entire, not fimbriate, spore-bearing undersurface smooth, rarely subpapillate or subrugulose
Stem:
1cm long, 0.5-1cm wide, often indistinct, lateral to spuriously central
Microscopic:
spores 6.5-8 x 4.5-6.5 microns, angular-lobate, spines up to 1 micron long, fuscous-vinaceous
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