Published: Q. Jl Fla Acad. Sci. 8 (2): 185 (1945)
Taxonomic status: This is a Inosperma.
Notes: Current name: Inosperma pallidifolium (Murrill) Matheny & Esteve-Rav., in Matheny, Hobbs & Esteve-Raventós, Mycologia 112 (1): 104 (2019).
Types: UNITED STATES: Florida: Union Co., Worthington Springs (approx. 29.9294°N, 82.4234°W, alt. approx. 35 m a.s.l.), 19 Nov. 1944, W.A. Murrill (Holotype. herbarium acc. no. FLAS-F-19517, HJB1000398; Isotype. herbarium acc. no. TENN-F-021175, HJB1000445).
Original diagnosis: Pileo conico-expanso, gregario, 3 cm lato, lucido, roseo-isabellino, farinaceo; lamellis sinuautis, pallidis, fimbriatis; sporis ovoideis, levibus, 10-11 X 5-6 μ; stipite albo, glabro, 2.5 X 1 cm.
English translation: Pileus conical to expanded, gregarious, 3 cm broad, shining, pinkish-isabelline, mealy; lamellae sinuate, pale, fimbriate; spores ovoid, smooth, 10-11 x 5-6 μ; stipe white, glabrous, 2.5 x 1 cm.
Commentary: The spores are reniform and smooth (9–10.5 × 5–6.5 µm). No pleurocystidia were found; the cheilocystidia were clavate, often stipitate up to 13 µm wide at the apex. Although no molecular data were forthcoming from the holotype, an ITS sequence was generated from the isotype at TENN, supporting the recombination. Inosperma pallidifolium is a member of the species complex around Is. lanatodiscum. The holotype sequence of Is. pallidofolium clustered within the large American Is. lanatodiscum clade also shown by (Kropp et al. 2013). Assuming this clade represents Is. lanatodiscum, this result suggests that Is. pallidifolium is a younger synonym of Is. lanatodiscum.
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