Biscogniauxia marginata (Fr.: Fr.) Pouzar
TELEOMORPH | CULTURES AND ANAMORPH | SPECIMENS EXAMINED | NOTES
Biscogniauxia marginata is unique among the Biscogniauxia taxa in having subglobose ascospores with a sigmoid germ slit. Gross morphologies of B. marginata and B. baileyi are similar. The latter, however, has a straight germ slit on the ascospore. The conidiogenous structure described by Callan and Rogers (1986) and Petrini and Müller (1986) is Nodulisporium-like. However, that described by Whalley and Edwards (1985) is Geniculosporium-like. This fungus was long known as Nummularia discreta, the cause of nail-head or blister disease of Malus. It is commonly associated with the Rosaceae.