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



Hypoxylon olivicolor San Martín, Y.-M. Ju, & J. D. Rogers apud Y.-M. Ju & J. D. Rogers, A Revision of the Genus Hypoxylon, p. 159. 1996.

Stromata effused-pulvinate, with inconspicuous perithecial mounds, 6 cm long x 2.5 cm broad x 1.5 mm thick; surface olivaceous (48), fringed with luteous (12) sterile margins; orange red granules immediately beneath surface and between perithecia, with KOH-extractable pigments orange (7); the tissue below the perithecial layer black, ca. 1 mm thick.

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

Ostioles lower than the stromatal surface.

Asci 140-180 mm total length x 5.5-6.5 mm broad, the spore-bearing parts 75-85 mm long, the stipes 58-100 mm long, with apical ring bluing in Melzer's iodine reagent, discoid, 1 mm high x 2.5 mm broad.

Ascospores brown to dark brown, unicellular, ellipsoid-inequilateral, with narrowly rounded ends, 9.5-11 x 4-5 mm, with straight to slightly sigmoid germ slit spore-length; perispore dehiscent in 10% KOH, smooth; epispore smooth.