Taphrina potentillae

Taphrina potentillae is a species of fungus in the Taphrinaceae family. A plant pathogen, it infects the flowers and leaves of species of the genera Potentilla and Parageum. The species was first described under the name Exoascus deformans var. potentillae by American botanist William Farlow in 1883. ...
Found on http://en.wikipedia.org/wiki/Taphrina_potentillae
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