Lathyrus hygrophilus Taub. [family LEGUMINOSAE], in Engler, Pflanzenw. Ost-Afrikas C: 219 (1895). —R.E. Fries, Wiss. Ergebn. Schwed. Rhod.-Kongo-Exped. 1: 92 (1914). —E.G. Baker, Legum. Trop. Africa: 349 (1929). —Robyns, Fl. Sperm. Parc Nat. Alb. 1: 336 (1948) pro parte. —Boutique in F.C.B. 6: 78, t. 6 (1954). —Hedberg in Symb. Bot. Upsal. XV.1: 122 (1957). —Binns, First Check List Herb. Fl. Malawi: 83 (1968). —Verdcourt in F.T.E.A., Leguminosae, Pap.: 1077, fig. 155 (1971). —Brummitt in Wye Coll. Malawi Proj. Rep.: 65 (1973). —Troupin, Fl. Rwanda, Spermatophytes 2: 166, fig. 47/2 (1983). —Lock, Leg. Afr. Check-list: 501 (1989). —Agnew, Upland Kenya Wild Fl., ed. 2: 151, t. 53 (1994). TAB. 3,7: 8. Syntypes from Tanzania.
Lathyrus kilimandscharicus Taub. [family LEGUMINOSAE], in Engler, Pflanzenw. Ost-Afrikas C: 219 (1895). —E.G. Baker, Legum. Trop. Africa: 350 (1929). Syntypes from Tanzania.
Lathyrus intricatus Baker [family LEGUMINOSAE], in Bull. Misc. Inform., Kew 1897: 261 (1897). —E.G. Baker, Legum. Trop. Africa: 350 (1929). Type: Malawi, Nyika Plateau, 6000–7000 ft, July 1896, Whyte (K, lectotype, chosen here).
Lathyrus hygrophilus var. angustifolius Baker f. [family LEGUMINOSAE], in J. Bot. 62: 333 (1924). Type from Uganda.