Hypoxylon subrutiloides Y.-M. Ju & J. D. Rogers



Hypoxylon subrutiloides Y.-M. Ju & J. D. Rogers, A Revision of the Genus Hypoxylon, p. 190. 1996.

Stromata glomerate to pulvinate, with conspicuous perithecial mounds, 2-7 mm diam x 0.8-1.5 mm thick; surface brown vinaceous (84) or sepia (63); dull orange brown or dull reddish brown granules immediately beneath surface and between perithecia, with KOH-extractable pigments honey (65), amber (47), or luteous (12); the tissue below the perithecial layer inconspicuous.

Perithecia spherical to obovoid, 0.3-0.5 mm diam x 0.4-0.7 mm high.

Ostioles lower than the stromatal surface.

Asci 145-170 mm total length x 11-14.5 mm broad, the spore-bearing parts 105-130 mm long, the stipes 30-40 mm long, with apical ring bluing in Melzer's iodine reagent, discoid, 1.5-2 mm high x 5-6 mm broad.

Ascospores brown to dark brown, unicellular, ellipsoid, nearly equilateral, with broadly to, less frequently, narrowly rounded ends, 17-23 x 8-11 mm, with straight germ slit spore-length; perispore indehiscent in 10% KOH; epispore smooth.