What is "pantadenia"

Pantadenia is a genus of plants under the family Euphorbiaceae first described as a genus in 1925. It is native to Madagascar and Indochina.

1. Pantadenia adenanthera Gagnep. - Cambodia, Laos, Thailand, Vietnam
2. Pantadenia chauvetiae (Leandri & Capuron) G.L.Webster - Madagascar
3. Pantadenia gervaisii R.Rabev. & McPherson - Madagascar