NUMMULARIA PUSILLA SACC.
The status of the name is uncertain.Nummularia pusilla Sacc., Hedwigia 28: Tab. II, Fig. 3. 1889.
AUSTRALIA: Callington, Tepper, rotten wood, ex Lloyd herb. (GZU-Petrak 2138, TYPE of Nummularia pusilla); Brisbane, Bailey, J. M. 631, rotten wood (K, HOLOTYPE of Hypoxylon ellipticum).
The above-cited specimens are overmature and depauperate. The type material of Hypoxylon ellipticum is much like that of Nummularia pusilla except for the ascospores being more variable. They appear to represent a good Biscogniauxia taxon, but have an ascospore morphology more commonly found in Nemania S. F. Gray. Stromata are discoid to pulvinate, with steep margins, 1-10 mm long x 0.8-2 mm broad x 0.4 mm thick, black externally and internally, carbonaceous, with a plane surface. Perithecia obovoid, 0.1 mm diam x 0.2-0.3 mm high. Ostioles are lower than the stromatal surface and appear to be punctate on the stromatal surface; they are usually surrounded by a slightly raised rim. Asci were not observed. Ascospores are light brown, unicellular, fusoid to somewhat ellipsoid, nearly equilateral, (14-) 16-21 (-23) x 5.5-7 mm, with a straight germ slit much less than to less than spore-length.
