Entoloma incanum (Fr.) Hesler

Entoloma incanum (Fr.) Hesler View in CoL , Beih. Nova Hedwigia 23: 147 (1967)

Fig. 5 View Figure 5

Description.

Pileus is 22.9–26.0 mm in diameter, broadly convex, disc depressed to deeply indented, margin entire; surfacesmooth or slightly with white fibrils, brown, yellowish brown, darker at the disc, getting paler or yellower towards the edge. Lamellae up to 3 mm broad, adnate to decurrent, subdistant, white, light yellow, entire, veined. Stipe 53.6 × 6.6 mm, yellow, or light greenish yellow, hollow, compressed, surface dry, smooth, base white with hypha.

Basidiospores 9.8–13.6 × 6.3–8.4 μm [x ̄ = 11.6 ± 1.1 × 7.4 ± 0.6 μm, Q = 1.3–2.0, Q m = 1.6 ± 0.2, n = 20], heterodiametric, with 6–8 angles in side-view. Basidia 40.3–60.8 × 10.2–15.9 μm, 4 - spored. Cheilocystidia absent. Pileipellis a cutis with a transition to a plagiotrichoderm and a trichoderm of cylindrical to slightly inflated hyphae 6.0–15.5 μm wide, with membranous light brown pigment. Clamp connections absent. Lamellae edge is fertile.

Notes.

Our Chinese samples clustered with northern America samples of E. incanum in the phylogenetic tree with full statistical values (Fig. 1 View Figure 1 ). Entoloma incanum is a remarkable species in the field due to its greenish-brown or yellowish-brown basidiomes with a bright stipe in green or yellow. Our samples present a relatively browner pileus than American samples ( Kuo 2013).

Specimen examined.

China • Qinghai Province, Tongren City, Zhamao Village , 23 August 2023, MQ He, ZRL 20234451 ( HMAS 300876 View Materials ) .