Pluteus longistriatus (Peck) Peck, Annual Report

Cho, Hae Jin, Lee, Hyun, Li, Vladimir, Jargalmaa, Suldbold, Kim, Nam Kyu & Lim, Min-Ji Kim and Young Woon, 2018, Six unrecorded macrofungi from the Royal Tombs (Donggureung and Seooreung) of the Joseon Dynasty and Jongmyo Shrine, Korea, Journal of Species Research 7 (1), pp. 1-8 : 6

Pluteus longistriatus (Peck) Peck, Annual Report on the New York State Museum of Natural History 38: 137 (1885)

Hierarchy: Basidiomycota, Agaricales , Plutaceae

Specimens examined: KOREA, Gyeonggi-do, Guri-si , Donggureung , 37°37 ʹ 17 ʺ N, 127°07 ʹ 19 ʺ E, 12 May 2016, Hae Jin Cho, Hyun Lee, Young Woon Lim, SFC20160512-14 (GenBank accession No. MF 445226), in the rotten knot of live Acer tataricum subsp. ginnala .

Pileus 20-35 mm, convex when young, becoming broadly convex to flat in age, umbonate to papillate, radially fibrillose, margin rugulose, orange grey (6B2) to brownish grey (7D2). Lamellae free, close, lamellulae abundant, white at first, becoming pinkish in age. Stipe 40-70 × 5-8 mm, cylindrical, equal, vertically fibrillose, white to whitish brown.

Basidiospores 6.4-7.0-7.7 × 5.4-6.0-6.9 μm, Q = 1.10- 1.16-1.27, subglobose to broadly ellipsoidal, anamyloid. Basidia 20.4-24.5-28.0 × 8.4-9.5-10.6 μm, clavate to ventricose. Cheilocystidia 43.1-56.0-67.2 × 10.2-13.0- 22.5 μm, subclavate to clavate. Pleurocystidia 49.1-60.6- 77.3 × 11.3-13.5-16.8 μm lageniform to subcylindric.

Remarks: Pluteus longistriatus is characterized by brownish grey color and the long, radial striations that extend from margin to center of the pileus, exposed white flesh between the striation cracks. This species is similar to P. plautus in morphology. However, the cheilocystidia of P. longistriatus is subclavate to clavate while the cheilocystidia of P. plautus is lageniform (Breitenbach and Kränzlin, 1995).