Hypoxylon investiens (Schwein.) M. A. Curtis



Hypoxylon investiens (Schwein.) M. A. Curtis, Geol. Nat. Hist. Surv. North Carolina, pt. III, p. 140. 1867.

º Sphaeria investiens Schwein., Trans. Amer. Philos. Soc., n. ser., 4: 193. 1832.

= ? Hypoxylon concurrens Berk. & M. A. Curtis apud Berk., Grevillea 4: 93. 1876.

= Hypoxylon microspora Pande, Bull. Bot. Surv. India 15: 8. 1973; non microsporum Ces., 1879; [nom. rejic., ICBN Art. 64.1].

Stromata effused-pulvinate, plane or with inconspicuous perithecial mounds, 1.5-10 cm long x 0.4-2 cm broad x 0.8-2 mm thick; surface brown vinaceous (84), sepia (63), dark brick (60), or chestnut (40); black granules immediately beneath surface and between perithecia, with KOH-extractable pigments greenish yellow (16), dull green (70), or dark green (21); the tissue below the perithecial layer inconspicuous to conspicuous, 0.2-1 mm thick.

Perithecia tubular to long tubular, 0.3-0.4 mm diam x 0.5-1 mm high.

Ostioles lower than the stromatal surface, beneath the perforated opening of the overlying stromatal layer.

Asci 72-102 (-135) mm total length x 4-6 mm broad, the spore-bearing parts 52-68 mm long, the stipes 20-48 (-78) mm long, with apical ring bluing in Melzer's iodine reagent, discoid, 0.5-1 mm high x 1.5-2.2 mm broad.

Ascospores light brown to brown, unicellular, ellipsoid, nearly equilateral, with broadly rounded ends to infrequently narrowly rounded ends, (6-) 6.5-9.5 (-10) x 3-4.5 mm, with faint, straight germ slit less than to slightly less than spore-length; perispore indehiscent in 10% KOH; epispore smooth.