Published: Syll. Fung. 5: 796 (1887)
Taxonomic status: This is a Inocybe.
Notes: Current name: Inocybe infida (Peck) Earle, Torreya 3(11): 170 (1903).
Basionym: Agaricus infidus Peck [as "Agaricus (Hebeloma) infidus"] (1875)
Types: UNITED STATES: New York: Adirondack Mountains (approx. 44.1447°N, 74.0479°W, alt. approx. 900 m a.s.l.) on boggy, mossy soil in woodland bog, Sep. 1873, C.H. Peck (Holotype. herbarium acc. no. NYS-F-001549, HJB1000264).
Diagnosis: Pileus firm, campanulate or expanded, subumbonate slightly squamulose on the disk, often split on the margin, whitish, lamellae close, pallid becoming cinnamon-brown; stem equal or slightly bulbous-thickened at the base, minutely furfuraceous, hollow, colored like the pileus; spores globose; rough with little nodules, .0003' in diameter. Plant about 2' high, pileus 6“-12" broad, stem 1“-2“ thick. Mossy ground in swampy woods. Adirondaek Mts. Sept. This species bears some resemblance to A. geophyillus, but the slightly squamulose pileus and the rough spores readily separate it. The margin of the pileus is sometimes deeply split, the radiating lobes giving a stellate appearance to the pileus.
Commentary: Inocybe infida was originally described by Peck (1875) as Agaricus (Hebeloma) infidus and recombined by Saccardo (1887) as Hebeloma infidum. The spores are nodulose and the cheilocystidia and pleurocystidia are ventricose with crystals at the apex, supporting the recombination into Inocybe as confirmed by Massee (1904) and Kauffman (1918, 1924). For some time, probably starting with Murrill (1909), I. infida got a reputation as a poisonous mushroom. Per Kauffman, Murrill (1909) misapplied the name I. infida to I. decipientoides, currently recognized as I. curvipes (P. Matheny 17 Jan 2020, http://inocybaceae.org/keys/Key_Inocybaceae_easternNA_v07.pdf, status accessed 23 Oct 2021).
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