Hypoxylon erythrostroma J. H. Miller

TELEOMORPH | CULTURES AND ANAMORPH | SPECIMENS EXAMINED | NOTES

TELEOMORPH

Hypoxylon erythrostroma J. H. Miller, Mycologia 25: 323. 1933.

= Hypoxylon gillesii J. D. Rogers & Cand., Mycotaxon 15: 507. 1982.

Stromata pulvinate, plane or with inconspicuous perithecial mounds, 0.7-1 mm thick; surface dark brick (60), grayish sepia (106), hazel (88), umber (9), or fuscous (103); orange red granules immediately beneath surface and between perithecia, with KOH-extractable pigments orange (7) or scarlet (5); the tissue below the perithecial layer black, ca. 0.4 mm thick.

Perithecia spherical to obovoid, 0.2-0.4 mm diam x 0.3-0.5 mm high.

Ostioles at the same level as or slightly higher than the stromatal surface.

Asci 90-115 mm total length x 4.5-7 mm broad, the spore-bearing parts 50-65 mm long, the stipes (16-) 31-54 mm long, with apical ring bluing in Melzer's iodine reagent, discoid, 0.4-0.8 mm high x 1.5-1.8 mm broad.

Ascospores light brown to brown, unicellular, fusoid to ellipsoid, slightly inequilateral to inequilateral, with nearly acute ends, (7-) 7.5-9.5 x 3-4.5 mm, with sigmoid germ slit spore-length; perispore dehiscent in 10% KOH, with inconspicuous coil-like ornamentation; epispore smooth.