Oidium erysiphoides Fr.

Ellis àf Everhart. North American Fungi.
Second Series.
2457. Oidium erysiplieoides, Fr.
Syst. Mycol. III. P- 432.
On Achillea millefolium.
Concordia, Mo. May, 188S-R c H Demetrio.
NEW YORK BOTANICAL GARDEN
EX. HERB.
BARNARD COLLEGE
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