Hypoxylon polyporum (Starb.) Y.-M. Ju & J. D. Rogers

TELEOMORPH | CULTURES AND ANAMORPH | SPECIMENS EXAMINED | NOTES

TELEOMORPH

Hypoxylon polyporum (Starb.) Y.-M. Ju & J. D. Rogers, A Revision of the Genus Hypoxylon, p. 171. 1996.

º Penzigia polyporus Starb., Ark. Bot. 5: 32. 1905.

= Pyrenopolyporus hunteri C. G. Lloyd, Mycol. Writings 5: 705. 1917.

Stromata peltate, convex on top, with short stout branched stipes which become coalescent and vague in mounds on mature stromata, with crenate margins, plane, 3.8-5 cm diam x 0.7-1.6 cm high; surface brown vinaceous (84) or sepia (63); blackish granules immediately beneath surface, with KOH-extractable pigments livid purple (81); the tissue below the perithecial layer massive, blackish, up to 1.5 cm thick, extending into the space between perithecia.

Perithecia long tubular, 0.2-0.3 mm diam x 1-1.4 mm high.

Ostioles lower than the stromatal surface.

Asci 235-265 mm total length x 6-7 mm broad, the spore-bearing parts 75-84 mm long, the stipes 155-181 mm long, with apical ring bluing in Melzer's iodine reagent, discoid, 1.5-2 mm high x 2.5-3 mm broad.

Ascospores light brown to brown, unicellular, ellipsoid-inequilateral, with narrowly rounded ends, 11.5-14 x 5-5.5 mm, with straight germ slit much less than spore-length; perispore indehiscent in 10% KOH; epispore smooth.