For Phyllanthopsis
Vorontsova, M.S. 2016. Phyllanthopsis. 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
Vorontsova, M.S., and P. Hoffmann. 2008. A phylogenetic classification of tribe Poranthereae (Phyllanthaceae, Euphorbiaceae sensu lato). Kew Bull. 63: 41-59. 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
Wurdack, K.J., P. Hoffmann, R. Samuel, A. de Bruijn, M. van der Bank, and M.W. Chase. 2004. Molecular phylogenetic analysis of Phyllanthaceae (Phyllanthoideae pro parte, Euphorbiaceae sensu lato) using plastid rbcL DNA sequences. Amer. J. Bot. 91: 1882-1900. Google Scholar