Hygrophorus fuscopapillatus 2020

Hygrophorus fuscopapillatus C.Q. Wang & T.H. Li 2020

Fungal Names: FN 570701

Holotype: China, Sichuan Province, Panzhihua City, Yanbian County, Gesala Ecotourism Area, elev. ca. 2900 m, 27°08'10"N, 101°11'33"E, 25 August 2013, M. Zhang & C.Q. Wang (GDGM44412, Holotype!). 

Morphological description

Pileus 20–30 mm broad, convex to hemispherical when young, applanate to plano-concave when mature, with a papilla or small umbo in the centre, white to pale grey (1B1), grey or brownish-grey to olive brown (4E2–3,4F1–3) at papilla, gradually becoming lighter from centre to margin, white to pale grey (1B1) at margin, glutinous when wet; margin even, occasionally split. Lamellae adnate to subdecurrent, white, thick, with 30–36 complete lamellae per pileus and 1–3 lamellulae between two entire lamellae. Stipe 40–60 × 4–5 mm, cylindrical, white to yellowishgrey (4B2), covered by a glutinous layer. Context thin, whitish.

Basidiospores (6)7–9.5(10) × (4)4.5–5.5(6) µm [mean length = 8.2 µm, mean width = 5 µm], Q =1.3–1.9, Qm =1.65, broadly ellipsoid, ellipsoid to oblong, smooth, hyaline. Basidia (32)35–46(48) × (6)6.5–8.5(9) µm, Q = 4.4–6.8, Qm = 5.5, clavate, thin-walled, 4-spored, with sterigmata 5–7.5 µm long. Pileipellis an ixotrichoderm, composed of septate and thin-walled cylindrical hyphae, covered with a gelatinous layer; hyphal cells 3–5 µm broad. Hymenophoral trama divergent, composed of septate, thin-walled and cylindrical hyphae; hyphal elements 13–31.5 µm broad. Clamp connections present.

Habitat: Solitary, on the ground of Fagaceae-dominated forests.

Distribution: So far only known from Sichuan and Yunnan provinces in Southwest China.

GenBank Accession: ITS：MN378337.

Notes:

Reference: Wang C-Q, Li T-H, Zhang M et al.(2020) Hygrophorus subsection Hygrophorus (Hygrophoraceae, Agaricales) in China. MycoKeys 68: 49–73. https://doi.org/10.3897/mycokeys.68.53264

Hygrophorus fuscopapillatus. a, b Basidiomata (GDGM44412, Holotype) c, d Basidiospores Basidiomata (LJW1858) e, f Basidiospores and Basidia (XHW6609) g, h Basidiospores and Basidia (GDGM44412) i, j Basidiospores and Basidia (LJW1858). Scale bars: 2 cm (a–f).