colony_structure_septate
septum|septa
Primary conidia commonly have 8-9 transverse septa and no longisepta, or occasionally one longiseptum in 1-5 of the transverse segments. The large numbers of conidia of intermediate size have 6-8 transverse septa and commonly one longitudinal or oblique septum in 1-4 of the transverse segments
Alternaria alternarina
Alternaria alternarina