Homophron spadiceum (P. Kumm.) Örstadius

2. Homophron spadiceum (P. Kumm.) Örstadius View in CoL &

E. Larss., in Örstadius, Ryberg & Larsson,

Mycol. Progr. 14(no. 25): 35 (2015) ( Figs. 2 View Fig , 6 View Fig )

Diagnostic characters. Pileus 25-50 mm, convex, with inflexed margin when young, plane when old; upper surface pale pinkish when young, pale reddish-brown with dark brown center when old, covered with minute hairs at margin; context flesh colored or pink. Lamellae adnate, very crowded, and pinkish to pale brown when young, and brown with red tinges when old. Stipe 30-80 × 5-11 mm, cylindrical, equal to or slightly tapering upward, white when young, pale brown when old, flocculose at apex. Basidiospores 6.7-10.5 × 4.2-5.5 μm, ovoid, oblong, subcylindrical, rarely amygdaloid, thin-walled. Basidia 16-35 × 6.5-8.0 μm, thin-wall, with 4-sterigmata. Pleurocystidia 30-85 × 10-30 μm, fusiform to conical, and abundant.

Habitat. Small groups on soil in mixed forests.

Material examined. KOREA, Taebaeksan National Park , Taebaek-si, Gangwon-do, 37°5 ʹ 35.1 ʺ N 128°56 ʹ 8.96 ʺ E, 4 vii 2023, NK Kim, NIBRFG0000515413 GoogleMaps .

Remarks. The phylogenetic tree analyzed in this study showed that this species formed an H. spadiceum s.l. clade consisting of three subclades ( Fig. 6 View Fig ). In addition, this species appears to have no restricted geographical distribution. The phylogenetic results were supported by previous molecular results ( Eberhardt et al., 2022).