LANDOLPHIA owariensis P. Beauv. [family APOCYNACEAE], in Fl. Owar. 1, 6: 55 (1804); T.T.C.L.: 52 (1949); Pichon in Mém. I.F.A.N. 35: 53 (1953) pro parte; Huber in F.W.T.A. ed. 2, 2: 55, t. 213 (1963); Kupicha in F.Z. 7, 2: 412 (1985); van Dilst in Wageningen Agric. Univ. Pap. 92, 2: 153, t. 32 & 33 (1992). Type: Nigeria, Bendel State, Warri, Palisot de Beauvois s.n. (G, holo.)
Pacouria owariensis (P. Beauv.) Hiern [family APOCYNACEAE], in Cat. Afr. Pl. Welw.1: 661 (1898)
Landolphia gentilii De Wild. [family APOCYNACEAE], Obs. Apoc. Latex Rec. Gentil: 10 (1901). Type: Congo (Kinshasa), between Tumba and Leopold II Lakes, Gentil 1 (BR, holo.)
Landolphia owariensis Stapf var. tomentella [family APOCYNACEAE], in F.T.A. 4, 1: 51 (1902). Type: Sudan, Djur land, Zeriba Ghattas, Schweinfurth 1377 (B†, holo., K, lecto., P, S, WU, iso., chosen by Persoon)
Landolphia stolzii Busse [family APOCYNACEAE], in E.J. 32: 168 (1902); T.T.C.L.: 52 (1949). Type: Tanzania, Rungwe District, Kondeland, Stolz 94 (K!, lecto., A, E, P, isolecto.)
Landolphia droogmansiana De Wild. [family APOCYNACEAE], in Lianes Caoutch. Et. Ind. Congo: 59 (1904). Type: Congo (Kinshasa), Kandakanda, Gentil 63 (BR, holo.)
Landolphia turbinata A.Chev. [family APOCYNACEAE], in Bull. Soc. Bot. Fr.53: 32 (1906). Type: Uganda, Masaka District, Dumu Forest, Dawe 47 pro parte (K!, holo.); the other part is L. dawei which is a synonym of L. landolphioides
Landolphia subturbinata Dawe [family APOCYNACEAE], in Rep. Bot. Miss. Uganda Protect.: 50 (1906). Type: as for L. turbinata
Landolphia kirkii (P. Beauv.) H. Durand var. owariensis [family APOCYNACEAE], in B.J.B.B. 2: 696 (1910)
Landolphia owariensis (De Wild.) A.Chev. var. gentilii [family APOCYNACEAE], in Rev. Bot. Appliq. 28: 397 (1948)
Landolphia owariensis (De Wild.) A.Chev. var. droogmansiana [family APOCYNACEAE], in Rev. Bot. Appliq. 28: 397 (1948)