References

For Rhinotropis

Abbott, J.R. 2011. Notes on the disintegration of Polygala (Polygalaceae), with four new genera for the flora of North America. J. Bot. Res. Inst. Texas 5: 125-137. Google Scholar

Abbott, J.R. 2021. Polygalaceae. In Flora of North America Editorial Committee. 2021. Flora of North America north of Mexico. Volume 10, Magnoliophyta: Proteaceae to Elaeagnaceae. Oxford Univ. Press, New York, NY. 456 pp. Google Scholar

Wendt, T. 1979. Notes on the genus Polygala in the United States and Mexico. J. Arnold Arb. 60: 504-514. Google Scholar