Published: Syll. Fung. 5: 796 (1887)
Taxonomic status: This is a Inocybe.
Notes: Current Name: Inocybe griseoscabrosa (Peck) Earle, Torreya 3(11): 169 (1903)
Basionym: Agaricus griseoscabrosus Peck [as "Agaricus (Hebeloma) griseoscabrosus"] (1873)
Types: UNITED STATES: New York: Albany County, Bethlehem (approx. 42.5779°N, 73.8184°W, alt. approx. 50 m a.s.l.) in woodland under Pinus sp., Oct. 1872, C.H. Peck (Holotype. herbarium acc. no. NYS-F-001425, HJB1000266).
Diagnosis: Pileus hemispherical or convex, dry, rough with scales and appressed fibres, cinereous, the margin whitish when young; lamellae close, broad, whitish, then ochraceous-brown; stem firm, solid, fibrillose or slightly scaly, subconcolorous; spores smooth, .00035' x .0002'. Plant gregarious, 1.5'-2' high, pileus 6"-10" broad, stem 1"-1.5'" thick. Ground in open pine woods. Bethlehem. October.
Commentary: This taxon was originally described by Peck (1873b) as Agaricus (Hebeloma) griseoscabrosus and recombined by Saccardo (1887) as Hebeloma griseoscabrosum. The spores are smooth walled, on average 11 × 5.7 μm, cheilocystidia and pleurocystidia are present, ventricose to utriform, thus supporting the recombination into Inocybe. Already Kaufman (1924) and Grund and Stuntz (1980) reported the species from various places in North America; Kuyper (1990) described a collection from Sweden under the name of I. griseoscabrosa. Kuyper (1986, 1990) saw it as a sister species of I. squarrosa; Matheny (17 Jan 2020, http://inocybaceae.org/keys/Key_Inocybaceae_easternNA_v07.pdf, status accessed 23 Oct 2021) keyed it out next to I. subochracea.
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