What is "neoboutonia"

Neoboutonia is a plant genus of the family Euphorbiaceae first described as a genus in 1864. It is the only genus in subtribe Neoboutoniinae, and native to tropical Africa.

1. Neoboutonia macrocalyx Pax - Burundi, Cameroon, Rwanda, Zaire, Kenya, Tanzania, Uganda, Malawi, Zambia, Zimbabwe
2. Neoboutonia mannii Benth. & Hook.f. - tropical Africa from Liberia to Mozambique
3. Neoboutonia melleri (Müll.Arg.) Prain - tropical Africa from Nigeria to Mozambique