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Sphenostylis stenocarpa

(African Yam Bean, Yam Pea)

Common Names

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Common Names in English:

African Yam Bean, African Yam-Bean, Yam Pea, Yam-Pea

Common Names in French:

Haricot Igname

Common Names in German:

Knollenbohne

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]

Physical Description

Habit: HerbClimbing: Climbing

Biology

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Reproduction

Duration: Perennial

Taxonomy

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Ambiguous Synonyms

  1. Sphenostylis congensis A.Chev.

Unambiguous Synonyms

  1. Dolichos soja L.
  2. Glycine angustifolia Miq.
  3. Glycine gracilis Skvortsov
  4. Glycine hispida (Moench)Maxim.
  5. Phalseolus max L.
  6. Phaseolus max L.
  7. Soja angustifolia Miq.
  8. Soja hispida Moench
  9. Soja japonica Savi
  10. Soja max (L.)Piper
  11. Soja soja H.Karst.
  12. Soja viridis Savi
  13. Sphenostylis stenocarpa (A. Rich.) Harms

Notes

Name Status: Accepted Name . Latest taxonomic scrutiny: –

Place of publication : Bot. Jahrb. Syst. 26:309. 1899

Name verified on 12-Mar-1987 by ARS Systematic Botanists. Last updated: 26-Feb-1999

Similar Species

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Members of the genus Sphenostylis

There are approximately 19 species in this genus:

S. angustifolia · S. briarti · S. briartii · S. capitata · S. stenocarpa · S. erecta obtusifolia · S. gossweileri · S. homblei · S. marginata · S. marginata erecta · S. marginata marginata · S. marginata obtusifolia · S. ornata · S. schweinfurthii · S. schweinfurthii benguellensis · S. schweinfurthii schweinfurthii · S. stenocarpa (African Yam Bean) · S. wildemaniana · S. zimbabweensis

Bibliography

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More Info

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Notes

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Contributors

Data Sources

Accessed through GBIF Data Portal January 28, 2008:

Identifiers

Last Revised: 2008-08-11