American varieties of Rorippa islandica
Butters, F. K. (Frederic King), 1878-1945 Abbe, Ernst C. (Ernst Cleveland), 1905-2000
Article
1940
Rhodora
42
25--32
BioStor
[Cambridge, Mass., etc.] New England Botanical Club [etc.]
BioStor: https://biostor.org/reference/139635