Solanum nelsonii Dunal var. acuminatum F. Br., in Christophersen & Caum, Bernice P. Bishop Mus. Bull. 81: 36. 1931. Type information: Holotype [BISH]. E.L. Caum 68. 19 June 1923. Nihoa: s.l..75m. Isotype(s) [BISH! [2], NY].