Name: Polyporus cryptopus
Author: Ellis & Barthol.
Citation: Erythea 4: 79 (1896) [MB#227507]
Sotome, K.; Hattori, T.; Kakishima, M. 2007. Polyporus phyllostachydis sp. nov. with notes on other rhizophilic species of Polyporus (Basidiomycota, Polyporaceae). Mycoscience. 48(1):42-46
Page number: 44
Description type: Non-original description
Description: Polyporus cryptopus Ellis & Barthol., Erythea 4:79 (1896). Fig. 3a
Basidiocarps centrally stipitate. Pileus circular, plane or depressed in the center, 1.9-5 cm in diameter, up to 3 mm thick; pileus surface wrinkled, light brown to grayish-brown (10YR5-7/4), margin round with inconspicuous lobes.
Stipe cylindrical, up to 1.5 cm long, up to 5 mm in diameter, wrinkled, pale orange (10YR8-9/4) at the top, otherwise covered with a grayish-brown to dark brown (10YR3-5/2) crust or without a crust. Context soft corky, brittle, 0.2-1.2 mm thick, pale orange (10YR9/4), without a crust.
Pore surface light brown (10YR6-7/4-8), pores angular, 2-3/mm, dissepiments thin, slightly dentate. Tubes pale orange (10YR7- 9/4), up to 2 mm deep.
Hyphal system dimitic with generative hyphae and skeletal- binding hyphae. Contextual generative hyphae 2-5 ?m in diameter, thin-walled, hyaline, with clamp connections. Contextual skeletal-binding hyphae thick-walled to solid, frequently branched, interwoven, hyaline, 2.5-5 ?m in diameter. Tramal generative hyphae 2-5 ?m in diameter, thin-walled, hyaline, with clamp connections. Tramal skeletal- binding hyphae 2-5 ?m in diameter, otherwise as in context. Crust on stipe composed of coralloid-binding hyphae with clavate tips, hyphae thick-walled, highly agglutinated. Basidia clavate, 17.5-37.5 × 4-8 ?m, with a basal clamp, 4-sterigmate. Basidiospores subcylindrical to subfusiform, hyaline, nondextrinoid, 6-10 × 2.5-4 ?m, L = 7.50 ?m, W = 3.01 ?m, R = 2.0-3.2, r = 2.51 (n = 127/5).
Specimens examined: USA: Rooks, Kansas, on Gramineae, July 24, 1895, E. Bartholmew (BPI, US0206745, holotype); Rockport, Kansas, 1898, E. Bartholmew (BPI, US0302651); Rooks, Kansas, on Gramineae, July 24, 1895, E. Bartholmew (BPI, US2026747); Rooks, Kansas, on Gramineae, July 25, 1895, E. Bartholmew (BPI, US2026748); Rockport, Kansas, on Gramineae, July 1895, E. Bartholmew (BPI, US2026749); Rockport, Kansas, on Gramineae, July 1895, E. Bartholmew (BPI, US2026746); Stockton, Kansas, on Gramineae, July 24, 1896, E. Bartholmew (BPI, US2026744, as Scutiger cryptopus); Bozeman, Montana, on Pinus contorta, 1917, J.R. Weir (BPI, US0206750); Kulm, North Dakota, July 1909, J.F. Brenckle (BPI, US0303050); Kulm, North Dakota, July 20, 1909, J.F. Brenckle (BPI, US0207090); Louisiana, July 19, 1894, A.B. Langloi (BPI, US2027091).
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