disease_shape_globose
round
Leaf spot of Sagittaria species. The round or sometimes vein-limited, angular, spots often cover a large proportion of the leaf surface and are then very conspicuous. The disease usually appears on the plants year after year and is present throughout the vegetative season of the host, although most obvious in the later part of that season.
Uredo sagittariae
Doassansia sagittariae