Oidium

HERBARIUM DF
THE NEW YORK BOTANICAL GARDEN
fungi of PENNSYLVANIA, USA
Oidium
on apothecia of Ionomidotis irregularis (Schweinitz)
Durand
CHESTER COtJNTY: along Buck and Doe Run, southwest of
Laurel
October 18, 1969
collected by Clark T. Rogerson Sc Donald G. Huttleston
Determined by
NEW YORK BOTANICAL GARDEN
03607516
03607516