D.J.Rogers & Appan (Lanjouw) 1973 - Rogers DJ, Appan SG (1973) Manihot Manihotoides (Euphorbiaceae). Flora Neotropica 13(2): 1-272. Retrieved from http://www.jstor.org/stable/4393691
There is no corrections for Manihot tristis subsp. saxicola yet.