References

For Tragia

Cardinal-McTeague, W.M., and L.J. Gillespie. 2016. Molecular phylogeny and pollen evolution of Euphorbiaceae tribe Plukenetieae. Syst. Bot. 41: 329-347. Google Scholar

Govaerts, R., D.G. Frodin, and A. Radcliffe-Smith. 2000. World checklist and bibliography of Euphorbiaceae (with Pandaceae). Volumes 1-4. Royal Botanic Gardens, Kew, England. Google Scholar

Miller, K.I., and G.L. Webster. 1967. A preliminary revision of Tragia (Euphorbiaceae) in the United States. Rhodora 69: 241-305. Google Scholar

Urtecho, R.J. 2016. Tragia. In Flora of North America Editorial Committee. 2016. Flora of North America north of Mexico. Volume 12, Magnoliophyta: Vitaceae to Garryaceae. Oxford Univ. Press, New York, NY. 603 pp. Google Scholar

Webster, G.L. 2014. Euphorbiaceae. In Kubitzki, K., ed. 2014. The families and genera of vascular plants, XI. Flowering plants – Eudicots – Malpighiales. Springer, Berlin. 331 pp. Google Scholar