Hypoxylon rubiginosum (Pers.: Fr.) Fr.

TELEOMORPH | CULTURES AND ANAMORPH | SPECIMENS EXAMINED | NOTES

TELEOMORPH

Hypoxylon rubiginosum (Pers.: Fr.) Fr., Summa Veg. Scand. II, p. 384. 1849.

º Sphaeria rubiginosa Pers., Observ. Mycol. I, p. 69. 1796; Pers.: Fr., Syst. Mycol. II, p. 340. 1823; non Spreng., 1827.

= Sphaeria granulosa Pers.: Fr., Syn. Meth. Fung., p. 11. 1801, non (Bull.) Sowerby, 1803.

º Sphaeria multiformis Fr.: Fr. var. granulosa (Pers.: Fr.) Fr., Syst. Mycol. II, p. 334. 1823.

= Hypoxylon stereoides Fr., Summa Veg. Scand. II, p. 384. 1849.

= Hypoxylon botrys Nitschke, Pyren. Germ., p. 34. 1867.

= Hypoxylon florideum Berk. & M. A. Curtis apud Berk., Grevillea 4: 50. 1875.

Stromata effused-pulvinate, sometimes pulvinate or even hemispherical, plane or with inconspicuous to conspicuous perithecial mounds, 0.3-10 cm x 0.3-5 cm broad x 0.5-1.2 (-1.5) mm thick; surface dark brick (60), sepia (63), brown vinaceous (84), or grayish sepia (106); yellowish brown or brown granules immediately beneath surface and between perithecia, with KOH-extractable pigments orange (7) or rust (39); the tissue below the perithecial layer usually inconspicuous.

Perithecia spherical to obovoid, 0.2-0.5 mm diam x 0.3-0.6 mm high.

Ostioles lower than the stromatal surface.

Asci 100-170 mm total length x 5.5-8 mm broad, the spore-bearing parts 63-83 mm long, the stipes 35-90 mm long, with apical ring lightly bluing to bluing in Melzer's iodine reagent, discoid, 0.8-1.5 mm high x 2-3 mm broad.

Ascospores brown to dark brown, unicellular, ellipsoid-inequilateral, with narrowly rounded ends, (8-) 9-12 x 4-5.5 mm, with straight germ slit spore-length; perispore dehiscent in 10% KOH, smooth or with inconspicuous coil-like ornamentation; epispore smooth.