Hypoxylon howeianum Peck

TELEOMORPH | CULTURES AND ANAMORPH | SPECIMENS EXAMINED | NOTES

TELEOMORPH

Hypoxylon howeianum Peck, Annual Rep. New York State Mus. 24: 98. 1871.

= Hypoxylon multiforme (Fr.: Fr.) Fr. var. australe Cooke, Grevillea 11: 129. 1883.

= Hypoxylon coccinellum Sacc., Ann. Mycol. 11: 312. 1913.

= Hypoxylon coccineum Bull. var. microcarpum Bizz., Atti Reale Ist. Veneto Sci. Lett. Arti, ser. VI, 3: 2. 1885.

º Hypoxylon variolosum (L.) J. Kickx fil. var. microcarpum (Bizz.) Traverso, Fl. Ital. Crypt. I, p. 42. 1906.

º Hypoxylon pulcherrimum Höhn., Ann. Mycol. 3: 187. 1905; non (Ellis & Everh.) P. Martin, 1967.

= ? Hypoxylon daldiniiforme P. Martin, J. S. African Bot. 35: 202. 1969; [nom. inval., ICBN Art. 37.1]; J. S. African Bot. 42: 82. 1976; as "daldiniforme".

Stromata hemispherical to spherical, sessile or nearly so, with inconspicuous to conspicuous perithecial mounds, 2-11 (-20) mm diam x (0.6-) 1.5-8 mm thick; surface fulvous (43), rust (39), or dark brick (60); orange red granules immediately beneath surface, with KOH-extractable pigments orange (7) or rust (39); white granules between perithecia; the tissue below the perithecial layer black, up to 7.5 mm thick.

Perithecia spherical to obovoid, 0.1-0.3 mm diam x 0.2-0.4 mm high.

Ostioles lower than or at the same level as the stromatal surface.

Asci 80-130 mm total length x 4.5-6.3 mm broad, the spore-bearing parts 50-70 mm long, the stipes 30-77 mm long, with apical ring bluing in Melzer's iodine reagent, discoid, 0.4-0.8 mm high x 1.2-2 mm broad.

Ascospores brown to dark brown, unicellular, ellipsoid-inequilateral, with narrowly rounded ends, 7-9.5 (-10) x 3-4.5 mm, with slight sigmoid germ slit spore-length; perispore dehiscent in 10% KOH, smooth; epispore smooth.