11. Millettia principis Gagnepain (1913: 363)

Type: — VIETNAM (Tonkin) or LAOS. P. H. d’Orleans s.n. (holotype: P02141858 image!; isotype: P02141859 image!) .

This species is only known from the type, and it is probably conspecific with Millettia pulchra because both are very similar in morphology. But it is necessary to conduct a comprehensive analysis of morphological and molecular data before this can be formalised.