This work is in progress, and have as main goal, reconstruct the evolutionary history and phylogeny of Cnidoscolus, and untangling the taxonomy of this group. If you are interested on this topic, please contact me.
As a first part of this exploration we published a Nomenclator for the genus Cnidoscolus interpreting and trying to resolve more than 250 names proposed for the genus in the las two and a half centuries.
Maya-Lastra, C.A. & Steinmann, V.W. 2018. A Nomenclator of Cnidoscolus (Euphorbiaceae). Phytotaxa 346 (1): 1–30. doi:10.11646/phytotaxa.346.1.1. - More information here or here