Crepidotus striatus T. Bau & Y.P. Ge

Phonemany, Monthien, Sysouphanthong, Phonguen & Thongklang, Naritsada, 2024, Additions to Crepidotus species (Basidiomycota): Six new species and two new records from Thailand, Phytotaxa 646 (2), pp. 91-115 : 104

Crepidotus striatus T. Bau & Y.P. Ge , in Ge & Bau, Mycosystema 39(2): 251 (2020), ( Figures 10–11 ).

Faces of fungi number: FoF 150100, Mycobank number: 830020.

Description: Basidiomata pleurotoid, small. Pileus 5–15 × 8–20 mm; labelliform, sapathuliform, rounded flabelliform to sub-rounded flabelliform, white to whitish when young then becoming light yellow (4A4) to brownish orange (5C3); surface smooth, moist, with slightly viscid; the point of attachment covered by white woolly hyphae; margin deflexed to inflexed, becoming straight to reflexed with age, inconspicuous striae, crenate. Lamellae 1–2 mm, decurrent, white to whitish becoming slightly brownish orange to brown with age (5C 3, 5E 4), moderately crowded, in 4–5 tiers. Stipe 1 mm long, or sometimes pseudostipe, whitish, translucent, cylindrical, with tomentose. Context thin, translucent, Odor mild. Taste none. Spore prints brown (6E6).

Basidiospores [150/3/2] (6.8–)7.3–8.0(–8.6) × (4.1–)5.2–5.4– 6.2(–6.7) µm, Q = (1.3–)1.36–1.67–2.01(–2.03), ellipsoid to elongate (oblong) in side view, light brown, smooth, thin-walled, inamyloid. Basidia (21–)21–25.8– 35(–37) × (5–)5.3–7.3–10.5(–11) µm, subclavate to clavate, with 2 to 4 sterigmata, hyaline, smooth, thin-walled. Cheilocystidia (24.5–)24.7–35–43.6(–44.1) × (7.6–)7.6–11.5–14.5(–14.5) µm, lageniform. Pleurocystidia absent. Hymenophoral trama irregular, hyphae 5–8 µm wide. Pileipellis a cutis, parallel hyphae 4–8 µm, branched hyphae up to 30 µm, with pileocystidia-liked terminal elements (41.1–)41.1–65.6–85.4(–85.4) × (4.1–)4.1–6.2–8(–8) µm. Clamp connections present in pileipellis, and hymenophoral trama.

Habitat and distribution:—Saprobic on a dead branch, scattered by 3–8 basidiomata. This has been found in China, and northern Thailand (this study).

Additional specimens examined:— THAILAND. Chiang Mai Province, Mae Taeng District, Tha Pha Village, Highway 1095 at 22 km marker of Mae Ma Lai-Pai Road, 19°07’36’’N, 98°45’48’’E, 27 May July 2019, Monthien Phonemany (MFLU23-0441, MFLU23-0442).

Figures

FIGURE 10. Basidiomata of Crepidotus striatus in the field. a–c MFLU23-0441, d MFLU23-0442. Scale bar a–f = 10 mm.

FIGURE 11. Micromorphology of Crepidotus striatus. a Basidiospores, b Basidia, c group of cheilocystidia, d cheilocystidia, e Pileipellis. Scale bar a = 5 µm, b = 10 µm, c–d = 20 µm, e = 50 µm.