Petrak, Fl. Bohem. Morav. Exs. PilzeF. Petrak [1-2575]
University of Wisconsin-Madison Herbarium
F. Petrak #s.n. 18 June 1924
Bremia lactucae Regel
|
|
|
USDA United States National Fungus Collections
Petrak, F. s.n. 06 August 1924
Bremia lactucae var. helichrysi
Czechoslovakia, Mahr.-Weisskirchen garden
|
|
|
|