Biscogniauxia divergens (Theiss.) Whalley & Laessøe

TELEOMORPH | CULTURES AND ANAMORPH | SPECIMENS EXAMINED | NOTES

TELEOMORPH

Biscogniauxia divergens (Theiss.) Whalley & Laessøe apud Whalley, Laessøe, & Kile, Mycol. Res. 94: 239. 1990.

º Nummularia divergens Theiss., Ann. Mycol. 6: 349. 1908.

º Hypoxylon divergens (Theiss.) J. H. Miller ex Dennis, Kew Bull. 14: 450. 1960.

º Numulariola divergens (Theiss.) P. Martin, J. S. African Bot. 35: 289. 1969; [nom. inval., ICBN Art. 33.2]; J. S. African Bot. 42: 76. 1976.

Stromata applanate, 0.3-3 mm diam x 0.6 mm thick; outer dehiscing layer dark brown, thin; mature surface blackish with brownish shade; carbonaceous immediately beneath surface and between perithecia; tissue beneath perithecia inconspicuous.

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

Ostioles at the same level as or lower than stromatal surface, with openings punctate.

Asci not observed.

Ascospores dark brown, ellipsoid, nearly equilateral, with one end narrowly rounded and the other bearing a hyaline cellular appendage 2-3 mm long x 2.5-3 mm broad, smooth, 15-22 (not including appendage) x 6-8 mm, with straight germ slit less than spore-length.