References

Horn, J.W., B.W. van Ee, J.J. Morawetz, R. Riina, V.W. Steinmann, P.E. Berry, and K.J. Wurdack. 2012. Phylogenetics and the evolution of major structural characters in the giant genus Euphorbia L. (Euphorbiaceae). Molec. Phylogen. Evol. 63: 305-326.