Surface characteristics of conidia from monosporous cultures of Penicillium digitatum and Aspergillus nidulans var. echinulatus.

Surface characteristics of conidia from monosporous cultures of Penicillium digitatum and Aspergillus nidulans var. echinulatus were studied by use of freeze-etch replicas. Surface configurations of coni8dia of both fungi were so variable that spore wall patterns do not appear to be consistent enough to have taxonomic significance at the strain or subspecies level.