Fig. 3From: The exotic rust fungus Puccinia abrupta var. partheniicola on the invasive alien weed Parthenium hysterophorus in India: rediscovery and first report of an epiphytoticPhotomicrographs of unstained urediniospores of Puccinia abrupta var. partheniicola—a mass of spores, bright-field 100× (A); a mass of spores, differential interference contrast (DIC) 400× (B); single spore, DIC 1000×, arrows point at individual spines (C); single spore, DIC 1000×, arrows point at individual spines (D)Back to article page