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Vigna owahuensis

(Oahu Cowpea)

Common Names

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Common Names in English:

Oahu Cowpea

Description

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Family Fabaceae

The Fabaceae are herbs, vines , shrubs , trees , and lianas found in both temperate and tropical areas. They comprise one of the largest families of flowering plants , numbering 630 genera and 18,000 species. The leaves are stipulate , nearly always alternate, and range from bipinnately or palmately compound to simple . The petiole base is commonly enlarged into a pulvinus that commonly functions in orientation of the leaves (sometimes very responsively, as in the sensitive plant, Mimosa pudica). The flowers are usually bisexual , actinomorphic to zygomorphic, slightly to strongly perigynous, and commonly in racemes , spikes, or heads . The perianth commonly consists of a calyx and corolla of 5 segments each. The androecium consists of commonly 1- many stamens (most commonly 10), distinct or variously united , sometimes some of them reduced to staminodes. The pistil is simple, often stipitate , comprising a single style and stigma, and a superior ovary with one locule containing 2-many marginal ovules. The fruit is usually a legume, sometimes a samara, loment, follicle, indehiscent pod, achene, drupe, or berry. The seeds often have a hard coat with hourglass-shaped cells , and sometimes bear a u-shaped line called a pleurogram. [Carr]

Subfamily Faboideae

Mostly herbs, shrubs , or trees . Leaves pinnate or palmate to trifoliolate or apparently simple . Corolla usually, showy, zygomorphic, the petals imbricate, posterior (upper or banner ) petal outermost in bud. Stamens 10 or 9 + 1 (diadelphous ), not showy. Pollen released in monads . Seeds with u-shaped line (pleurogram) lacking. [Carr]

Genus Vigna

Climbing , prostrate or erect herbs or subshrubs , rarely small shrubs . Leaves pinnately trifoliolate ; stipules bilobed or spurred at the base or not spurred, stipels generally present. Inflorescence axillary or terminal , falsely racemose or flowers in dense 1-many flowered subumbellate clusters ; rachis usually thickened and glandular at the point of insertion of pedicels; bracts and bracteoles ± deciduous. Calyx 5-lobed, 2-lipped; upper lip of 2 lobes completely or partly united , lower lip 3-lobed. Vexillum with inflexed auricles and 2-4 appendages or rarely appendages absent; keel truncate , obtuse or beaked , sometimes the beak incurved through up to 360°. Stamens diadelphous 9+1, anthers uniform . Ovary 3-many ovuled; style with tenuous lower part obsolete or quite long, filiform or flattened, upper part thickened and cartilaginous , straight or curved , upper portion barbate or hirsute on inner side, sometimes produced beyond the stigma to form a short to long subulate or rarely flattened or capitate beak; stigma completely lateral , oblique or rarely ± terminal. Pod linear or linear oblong, cylindrical or flattened, straight or curved. Seeds mostly reniform or quadrate ; aril obsolete to well developed, often 3-pronged.

A large genus with c. 150 species, throughout the tropics of both hemispheres."Vigna". in Flora of Pakistan Page 242. Published by Science Press (Beijing) and Missouri Botanical Garden Press. Online at EFloras.org.

Physical Description

Habit: Vine , Forb/herb

Biology

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Reproduction

Duration: Annual , Perennial

Taxonomy

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Similar Species

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Members of the genus Vigna

There are approximately 427 species in this genus. Here are just 100 of them:

V. subramanianus · V. adenantha · V. mungo · V. mungo · V. subramanianus · V. trilobata · V. aconitifolia (Mat Bean) · V. aconitifolia 'Mother Bean' (Mat Bean) · V. acontifolia · V. acuminata · V. adenantha (Pipi) · V. ambacensis var. pubigera · V. angievensis · V. angivensis · V. angularis (Adzuki Bean) · V. angularis 'Late Tamba' (Adzuki Bean) · V. angularis var. angularis · V. angularis var. nipponensis · V. antillana (Antilles Bean) · V. antunesii · V. aridicola · V. benthamii · V. benuensis · V. bequaertii · V. bosseri · V. bournaea · V. bourneae · V. briarti · V. burchellii · V. juruana · V. candida · V. canescens · V. capitata · V. caracalla (Bertoni Bean) · V. clarkei · V. comosa · V. comosa abercornensis · V. comosa comosa · V. cylindrica · V. cylindrica cylindrica · V. dalzelliana · V. dalzelliana var. dalzelliana · V. dalzelliana var. elongata · V. desmodioides · V. dolichonema · V. dolomitica · V. elegans · V. exilis · V. exillata · V. filicaulis · V. filicaulis var. pseudovenulosa · V. firmula · V. bequaertii · V. friesiorum · V. frutescens · V. frutescens frutescens · V. frutescens incana · V. frutescens kotschyi · V. gangetica · V. gazensis · V. glabrescens · V. gracilicaulis · V. gracilis · V. grahamiana · V. grandiflora · V. hainiana · V. halophila · V. hastata · V. hastifolia · V. haumaniana · V. heterophylla · V. hirsuta · V. hirtella · V. holosericea · V. holstii · V. homblei · V. hookeri · V. hosei (Sarawak Bean) · V. hosei var. pubescens · V. inga · V. juncea · V. juncea var. corbyi · V. juruana (Tropical Cowpea) · V. keraudrenii · V. khandalensis · V. kirkii · V. kokii · V. lanceolata · V. lanceolata var. filiformis · V. lanceolata var. lanceolata · V. lasiocarpa · V. latidenticulata · V. laurentii · V. frutescens subsp. incana · V. linearis · V. linearis var. latifolia · V. linearis var. linearis · V. lobata · V. longifolia (Longleaf Cowpea) · V. longissima

Bibliography

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More Info

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Notes

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Contributors

Data Sources

Accessed through GBIF Data Portal March 14, 2008:

Identifiers

Footnotes

Last Revised: 2008-12-08