Frangula betulifolia and F. obovata (Rhamnaceae) are distinct species
Nesom, Guy L Sawyer, John O. (John Orvel), 1939-2012
Article
2009
Phytologia
91
Issue: 2
300--307
BioStor Index of American Botanical Literature
English
Bronx Park, New York H.A. Gleason and H.N. Moldenke
BioStor: https://biostor.org/reference/208592