Hypoxylon rutilum Tul. & C. Tul.

TELEOMORPH | CULTURES AND ANAMORPH | SPECIMENS EXAMINED | NOTES

TELEOMORPH

Hypoxylon rutilum Tul. & C. Tul., Sel. Fung. Carp. II, p. 38. 1863.

= Hypoxylon pulchellum Sacc., Atti Soc. Veneto-Trentino Sci. Nat. Padova 4: 121. 1875.

= Hypoxylon miniatum Cooke, Grevillea 7: 80. 1879.

Stromata pulvinate to effused-pulvinate, sometimes hemispherical, plane or with inconspicuous perithecial mounds, 1-8 mm diam x 0.7-1.5 mm thick when erumpent, up to 35 mm long x 12 mm broad x 0.5-1 mm thick when growing on decorticated wood; surface umber (9), umber (9) to fuscous (103), or dark brick (60); red or scarlet granules immediately beneath surface and between perithecia, with KOH-extractable pigments orange (7) or scarlet (5); the tissue below the perithecial layer black, 0.3-1.3 mm thick.

Perithecia spherical, 0.1-0.2 mm diam.

Ostioles slightly higher than the stromatal surface, conical-papillate to papillate.

Asci 115-130 mm total length x 6-7 mm broad, the spore-bearing parts 55-75 mm long, the stipes 45-70 mm long, with apical ring bluing in Melzer's iodine reagent, discoid, 0.5-1 mm high x 2-2.5 mm broad.

Ascospores brown to dark brown, unicellular, ellipsoid-inequilateral, with narrowly rounded ends, 7.5-9.5 x 3.5-4.5 mm, with straight germ slit spore-length; perispore dehiscent in 10% KOH, smooth to with inconspicuous coil-like ornamentation; epispore smooth.