Hypoxylon musceum J. D. Rogers
TELEOMORPH | CULTURES AND ANAMORPH | SPECIMENS EXAMINED | NOTES
Hypoxylon musceum J. D. Rogers, Canad. J. Bot. 59: 1363. 1981.
Stromata glomerate, usually containing fewer than 20 perithecia, with conspicuous perithecial mounds, 0.5-2 (-4) mm diam x 0.5-0.8 mm thick; surface olivaceous (48) or isabelline (65); black granules immediately beneath surface and between perithecia, with KOH-extractable pigments pure yellow (14) with citrine (13) tone, greenish olivaceous (90), or orange (7); the tissue below the perithecial layer inconspicuous.
Perithecia spherical, 0.2-0.4 mm diam.
Ostioles lower than the stromatal surface.
Asci 83-110 mm total length x 6-9 mm broad, the spore-bearing parts 65-84 mm long, the stipes 10-38 mm long, with apical ring bluing in Melzer's iodine reagent, discoid, 0.8-1.2 mm high x 2.2-3 mm broad.
Ascospores brown to dark brown, unicellular, ellipsoid-inequilateral, with narrowly rounded ends, 9-13 x (4-) 4.5-6 mm, with sigmoid germ slit much less than spore-length; perispore dehiscent in 10% KOH, with inconspicuous coil-like ornamentation; epispore smooth.