Mezoneuron is a genus of flowering plants in the legume family, Fabaceae. It belongs to the subfamily Caesalpinioideae and the tribe Caesalpinieae.
Characteristics and distribution This genus consists of lianas, often with the characteristic 'cat's claw' spines on their stems. Pods are one or more seeded, with a longitudinal (often narrow) wing along the upper suture and a wing 2 mm or more wide, which may be papery, coriaceous or woody. They may be found in Africa, Madagascar and SE Asia across the Malay Peninsula and Archipelago to New Guinea, New Caledonia and Australia, one species endemic to Hawaii.
Species Mezoneuron comprises the following species: Mezoneuron andamanicum Prain Mezoneuron angolense Welw. ex Oliv. Mezoneuron baudouinii Guillaumin Mezoneuron benthamianum Baill. Mezoneuron brachycarpum Benth. Mezoneuron cucullatum (Roxb.) Wight & Arn. Mezoneuron enneaphyllum (Roxb.) Wight & Arn. ex Voigt Mezoneuron erythrocarpum (Pedley) R. Clark & E. Gagnon Mezoneuron furfuraceum Prain
Mezoneuron hildebrandtii Vatke Mezoneuron hymenocarpum Wight & Arn. ex Prain Mezoneuron kauaiense (H. Mann) Hillebr.—Uhiuhi (synonym M. kavaiense - Hawaii) Mezoneuron latisiliquum (Cav.) Merr. Mezoneuron mindorense Merr. Mezoneuron montrouzieri Guillaumin Mezoneuron nhatrangense Gagnep. (Vietnam) Mezoneuron nitens (F. Muell. ex Benth.) R. Clark & E. Gagnon Mezoneuron ouenensis (Guillaumin) R. Clark Mezoneuron pubescens Desf. Mezoneuron rubiginosum (Guillaumin) R. Clark Mezoneuron sinense Hemsl. Mezoneuron schlechteri (Harms) R. Clark Mezoneuron scortechinii F. Muell. Mezoneuron sumatranum (Roxb.) Wight & Arn. (Malesia, Indochina)
Fossils The following fossils have been described: †Mezoneuron claibornensis (Herendeen & Dilcher) R. Clark & E. Gagnon †Mezoneruon flumen-viridensis (Herendeen & Dilcher) R. Clark & E. Gagnon †Mezoneuron spokanensis (Knowlton) R. Clark & E. Gagnon
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