Note: The subspecies of
Calystegia macrostegia are not recognized in a recent thesis, Namoff, S. M. 2017. Hybridization processes, biogeographic patterns and taxonomic rearrangements within
Calystegia (Convolvulaceae). PhD. Claremont Graduate University, Claremont, California, USA, which we follow here. In addition, that work recommends transfer of all
Calystegia taxa to the genus
Convolvulus;
Dice, James C. 740 [SDSU],
Estrella, Dinna 22 [SDSU],
Guilliams, C. Matt 2000-04-29 [SDSU],
Buschbom, Jutta 30 [SDSU],
more...Mass, Jeremy 10 [SDSU], Dong, Dang 7 [SDSU], Austin, Jonathan S. 13 [SDSU], Dice, James C. 740 [SDSU], Steinberg, J. Jill 26 [SDSU], James C. Dice 740 [RSA], James C. Dice 740 [SD], ...less