Leichhardtia guillauminiana (P.T.Li) Gâteblé, Meve & Liede, comb. nov. (LSID: 77315164-1).

Basionym: Tylophora guillauminiana Li (1994: 64), replacement name for Tylophora micrantha Guillaumin (1944: 82), nom. illeg., non Tylophora micrantha Decaisne (1834: 377); Marsdenia guillauminiana (Li) Meve et al. (2017: 69); Leichhardtia micrantha (Guillaumin) Liede et al. in Liede-Schumann et al. (2020: 126), nom. illeg. & nom. superfl.

Type:— NEW CALEDONIA. Grande Terre, North Province, Balade, 1855–1860, E. Vieillard 987 (lectotype, P [P00607353], designated by Liede-Schumann et al. (2020: 126)).

With the new species, New Caledonian Leichhardtia actually encompasses a total of 20 species, for which an updated key is provided here.