Oidium erysiphoides Fr.

FUNGI COLUMBIANI.-E. Bartholomew.
-?-
2239. Oidium erysipheoides, Fr.
1832: Syst. Mycol. III, p. 432.
On Helianthus tuberosus.
Stockton, Kans., Oct 2, 1905.	E.
NEW YORK BOTANICAL GARDEN
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Vlfelfe^iev College
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