Cladistic analysis of Psophocarpus Neck. ex DC. (Leguminosae, Papilionoideae) based on morphological characters

H. N.Nur Fatihah*, N. Maxted, L. Rico Arce

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

11 Citations (Scopus)


Psophocarpus Neck. ex DC. (Leguminosae; Papilionoideae) is a genus of eight tropical African legume species and with a single cultivated Asian species P. tetragonolobus or the winged bean. Current increasing interest in the use of wild relatives as a source of adaptive traits for breeding has lead to an attempt to clarify the phylogenetic relationships within the genus. To test the monophyly of Psophorcarpus, a cladistics analysis was undertaken based on morphological characters recorded from herbarium specimens representing the nine species of Psophocapus with species of three related genera, Vigna, Otoptera and Dysolobium, as outgroups. The results indicated that the genus Psophocarpus is monophyletic and the nine species resolved into four subclades: subgen. Psophocarpus sect. Psophocarpus (P. palustris, P. tetragonolobus and P. scandens); subgen. Psophocarpus sect. Vignopsis (P. lancifolius and P. lukafuensis); subgen. Lophostigma (P. obovalis, P. monophyllus and P. lecomtei); and a new subgen. Longipedunculares (P. grandiflorus) which is herein proposed.

Original languageEnglish
Pages (from-to)78-88
Number of pages11
JournalSouth African Journal of Botany
Publication statusPublished - 1 Nov 2012


  • Cladistics
  • Monophyletic
  • Morphological characters
  • Psophocarpus
  • Taxonomy

ASJC Scopus subject areas

  • Plant Science


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