Hypoxylon papillatum Ellis & Everh.

TELEOMORPH | CULTURES AND ANAMORPH | SPECIMENS EXAMINED | NOTES

TELEOMORPH

Hypoxylon papillatum Ellis & Everh. apud C. L. Smith, Bull. Iowa Univ. Lab. Nat. Hist. 2: 408. 1893.

Stromata effused-pulvinate, plane or with inconspicuous to conspicuous perithecial mounds, up to 12.5 cm long x up to 4 cm broad x 1.8-4 mm thick; surface honey (64) to isabelline (65), isabelline (65) to gray olivaceous (107), or isabelline (65) to olivaceous (48); blackish granules immediately beneath surface and between perithecia, with KOH-extractable pigments isabelline (65); the tissue below the perithecial layer conspicuous, black, 1-2.5 mm thick.

Perithecia long tubular, 0.3-0.4 mm diam x 0.8-1.5 mm high.

Ostioles lower than the stromatal surface.

Asci 137-180 mm total length x 8-10 mm broad, the spore-bearing parts 93-110 mm long, the stipes 30-80 mm long, with apical ring bluing in Melzer's iodine reagent, discoid, 1-2 mm high x 3.5 mm broad.

Ascospores brown to dark brown, unicellular, ellipsoid, nearly equilateral, with broadly to narrowly rounded ends, 12-18.5 x 6.5-9 mm, with straight germ slit spore-length; perispore indehiscent in 10% KOH; epispore smooth.