7. Imbralyx acutiflorus (Gagnep.) Z.Q. Song, comb. nov.

≡ Millettia acutiflora Gagnepain (1913: 350) .

Type: — THAILAND. monts de La-khon, pres du Mekong, September 1877, Harmand s.n. (holotype: P02141775 image!; isotype: P02768357 image!) .

Morphologically, Millettia acutiflora has distinct brachyblasts bearing numerous flowers, spindle-shaped flowerbuds, imbricate calyx lobes in buds, white petals, monadelphous stamens, and raised nervation on both surfaces of leaflets, which are consistent with those of the newly reinstated genus Imbralyx (Song 2021) . Thus, a new combination Imbralyx acutiflorus (Gagnep.) Z.Q. Song is established here based on M. acutiflora Gagnep.