• Leucaena Bentham, 1842
• Leucaena blancii Ram. Goyena accepted as Leucaena leucocephala (Lam.) de Wit
• Leucaena bolivarensis Britton & Killip accepted as Leucaena trichodes (Jacq.) Benth.
• Leucaena brachycarpa Urb. accepted as Leucaena diversifolia (Schltdl.) Benth.
• Leucaena brandegeei Britton & Rose accepted as Leucaena lanceolata S. Watson
• Leucaena canescens Benth. accepted as Leucaena trichodes (Jacq.) Benth.
• Leucaena collinsii Britton & Rose
• Leucaena colombiana Britton & Killip accepted as Leucaena trichodes (Jacq.) Benth.
• Leucaena confertiflora Zarate
• Leucaena confusa Britton & Rose accepted as Leucaena esculenta (DC.) Benth.
• Leucaena cruziana Britton & Rose accepted as Leucaena lanceolata S. Watson
• Leucaena cuspidata Standl.
• Leucaena diversifolia (Schltdl.) Benth.
• Leucaena doylei Britton & Rose accepted as Leucaena esculenta (DC.) Benth.
• Leucaena dugesiana Britton & Rose accepted as Leucaena pallida Britton & Rose
• Leucaena esculenta (DC.) Benth.
• Leucaena formosa Griseb. accepted as Lysiloma sabicu Benth.
• Leucaena forsteri Benth. accepted as Schleinitzia insularum (Guill.) Burkart
• Leucaena glabrata Rose accepted as Leucaena leucocephala (Lam.) de Wit
• Leucaena glauca Benth. accepted as Leucaena leucocephala (Lam.) de Wit
• Leucaena greggii S. Watson
• Leucaena guatamalensis Britton & Rose accepted as Leucaena trichandra (Zucc.) Urb.
• Leucaena houghii Britton & Rose accepted as Leucaena macrophylla Benth.
• Leucaena insularum (Guill.) Daniker accepted as Schleinitzia insularum (Guill.) Burkart
• Leucaena involucrata Zarate
• Leucaena lanceolata S. Watson
• Leucaena latisiliqua (L.) Gillis & Stearn accepted as Lysiloma latisiliquum (Linnaeus) Bentham, 1875
• Leucaena laxifolia Urb. accepted as Leucaena diversifolia (Schltdl.) Benth.
• Leucaena lempirana C.E. Hughes
• Leucaena leucocephala (Lam.) de Wit
• Leucaena macrocarpa Rose accepted as Leucaena macrophylla Benth.
• Leucaena macrophylla Benth.
• Leucaena magnifica (C.E. Hughes) C.E. Hughes
• Leucaena matudae (Zarate) C.E. Hughes
• Leucaena microcarpa Rose accepted as Leucaena lanceolata S. Watson
• Leucaena mixtec C.E. Hughes & S.A. Harris
• Leucaena multicapitula Schery
• Leucaena nelsonii Britton & Rose accepted as Leucaena macrophylla Benth.
• Leucaena nitens M.E. Jones accepted as Leucaena lanceolata S. Watson
• Leucaena oaxacana Britton & Rose accepted as Leucaena pallida Britton & Rose
• Leucaena pallida Britton & Rose
• Leucaena palmeri Britton & Rose accepted as Leucaena lanceolata S. Watson
• Leucaena paniculata Britton & Rose accepted as Leucaena pallida Britton & Rose
• Leucaena plurijuga Standl. accepted as Hesperalbizia occidentalis (Brandegee) Barneby & J.W. Grimes
• Leucaena pseudotrichodes (DC.) Britton & Rose accepted as Leucaena trichodes (Jacq.) Benth.
• Leucaena pubescens Britton & Rose accepted as Leucaena lanceolata S. Watson
• Leucaena pueblana Britton & Rose
• Leucaena pulverulenta (Schltdl.) Benth.
• Leucaena purpusii Britton & Rose accepted as Leucaena lanceolata S. Watson
• Leucaena rekoi Britton & Rose accepted as Leucaena lanceolata S. Watson
• Leucaena retusa Benth.
• Leucaena revoluta Britton & Rose accepted as Leucaena trichandra (Zucc.) Urb.
• Leucaena salvadorensis Britton & Rose
• Leucaena shannonii Donn. Sm.
• Leucaena sinaloensis Britton & Rose accepted as Leucaena lanceolata S. Watson
• Leucaena sonorensis Britton & Rose accepted as Leucaena lanceolata S. Watson
• Leucaena spontanea C.E. Hughes & S.A. Harris
• Leucaena standleyi Britton & Rose accepted as Leucaena trichandra (Zucc.) Urb.
• Leucaena stenocarpa Urb. accepted as Leucaena trichandra (Zucc.) Urb.
• Leucaena trichandra (Zucc.) Urb.
• Leucaena trichodes (Jacq.) Benth.
• Leucaena ulei Harms accepted as Parkia ulei (Harms) Kuhlm.