Biscogniauxia citriformis (Whalley, Hammelev, & Taligoola) Van der Gucht & Whalley
TELEOMORPH | CULTURES AND ANAMORPH | SPECIMENS EXAMINED | NOTES
Biscogniauxia citriformis (Whalley, Hammelev, & Taligoola) Van der Gucht & Whalley, Mycol. Res. 96: 895. 1992.
º Hypoxylon citriforme Whalley, Hammelev, & Taligoola, Trans. Brit. Mycol. Soc. 90: 141. 1988.
Stromata applanate, 0.5-6 cm long x 0.5-5 cm broad x 0.7-1.2 mm thick; outer dehiscing layer dark brown, thin; mature surface gray; carbonaceous immediately beneath surface and between perithecia; tissue beneath perithecia inconspicuous.
Perithecia obovoid to tubular, 0.2-0.4 mm diam x 0.5-1 mm high.
Ostioles lower than stromatal surface, with openings umbilicate, sometimes overlain with white substance.
Asci 100-125 mm total length x 6-7 mm broad, the spore-bearing parts 70-90 mm long, the stipes 25-35 mm long, with apical ring bluing in Melzer's iodine reagent, discoid, 1.5-2 mm high x 3.5 mm broad.
Ascospores dark brown, unicellular, ellipsoid, strongly inequilateral, almost "C"-shaped in some orientations, with pinched ends, smooth, 10.5-12.5 x 5.5-7.5 mm, with straight, broad, faint germ slit spore-length on more convex side.