11. Imbralyx unifoliatus (Prain) Z.Q. Song, comb. nov.

≡ Millettia unifoliata Prain, J. Asiat. Soc. Bengal, Pt. 2, Nat. Hist. 66: 93. 1897 (King 1897). ≡ Fordia unifoliata (Prain) U.A. Dasuki & Schot, Blumea 36(1): 202. 1991 (Dasuki & Schot 1991). Type:— MALAYSIA. Perak, Larut, 500‒800 ft., June 1883, King’s Collector (Kunstler) 4492 (lectotype: K000898210!, designated here, Fig. 3; isolectotypes: BM!, CAL0000011564 image!, CAL0000011565 image!, L0772435 image!, L0772436 image!, P02753681 image!).

Notes: In the protologue of Millettia unifoliata Prain in King (1897), eight gartherings from Perak, Malaysia were cited by the author, including Curtis 1615, Scortechini 124, 1023, 1711, Wray 2836, and Kunstler 4251, 4492, 8210. Dasuki & Schot (1991) designated H. N. Ridley 8004 (K) as the lectotype of Millettia unifoliata Prain, but this garthering was not cited in the protologue of this name. Instead, this garthering was cited in the protologue of Millettia albiflora Prain. Therefore, the lectotypification by Dasuki & Schot (1991) was not designated from the original material and can not be accepted according to Article 9.4 of ICN (Turland et al. 2018). In this study, King’s Collector (Kunstler) 4492 (K000898210, Fig. 3) was re-designated from the original material as the lectotype of Millettia unifoliata Prain. This lectotype bears a drawing of a dissected flower, and several isolectotypes are found with flowers or dropped pods at other four herbaria (BM, CAL, L and P), all of which match all other details of the protologue.