Oidium erysiphoides Fr.

FUNGI COLUMBIANI.-E. Bartholomew.
-?--s
2239. Oidium erysipheoides, Fr.
1832: Syst. Mycol. III, p. 432.	\
On Helianthus tuberosus.
Stockton, Kans., Oct 2, 1905.	E. B.
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