Fabaceae
Vigna

Vigna nyangensis Mithen

First published in Kew Bull. 44: 175 (1989)
This species is accepted
The native range of this species is Zimbabwe to Angola. It is a perennial and grows primarily in the seasonally dry tropical biome.

Descriptions

Extinction risk predictions for the world's flowering plants to support their conservation (2024). Bachman, S.P., Brown, M.J.M., Leão, T.C.C., Lughadha, E.N., Walker, B.E. https://nph.onlinelibrary.wiley.com/doi/full/10.1111/nph.19592

Conservation
Predicted extinction risk: not threatened. Confidence: low confidence
[AERP]

International Legume Database and Information Service

Ecology
Africa: Zambezian grassland
Morphology General Habit
Perennial, Climbing, Herb
[ILDIS]

Leguminosae, B. Mackinder, R. Pasquet, R. Polhill and B. Verdcourt. Flora Zambesiaca 3:5. 2001

Morphology General Habit
Perennial herb with rootstock.
Morphology Stem
Stem glabrous, although young stems display a short pubescence.
Morphology Leaves Leaflets
Leaflets 3, 3–4 × 0.5–2 cm, oblong-lanceolate, acute and mucronulate at the apex, rounded at the base, sparsely pubescent, especially on the upper surface; petiole 1–4 cm long; rhachis 0.3–1 cm long; stipules 3–4 × 1–1.5 mm, lanceolate, not produced beyond the base or slightly bilobed at the base, multinerved.
Morphology Reproductive morphology Inflorescences
Peduncle 3–10 cm × 0.7–1.5 mm, 3-winged, glabrous; rhachis 2–4 cm long, 12–20-noded, internodes 1–3 mm long.
Morphology Reproductive morphology Flowers
Flower 10–17 mm long; pedicel 1.5–4 mm long, expanding as the pod matures; bracteoles 1–2 × 0.8–1 mm, 1-nerved.
Morphology Reproductive morphology Flowers Calyx
Calyx glabrous; tube 2–3 mm long; lobes 1.5–3 mm long, the lower twice as long as the laterals, the upper pair joined into an obtuse and acuminate lip.
Morphology Reproductive morphology Flowers Corolla
Standard with two weak central appendages; keel with a short beak 2–3 mm long, slightly twisted towards the left or not twisted.
Morphology Reproductive morphology Flowers Androecium Stamens Anthers
Alternate anthers with a pair of glands at their base.
Morphology Reproductive morphology Flowers Pollen
Pollen exine not reticulate.
Morphology Reproductive morphology Flowers Gynoecium Pistil
Ovary 12–14-ovuled; style tip almost not beaked.
Morphology Reproductive morphology Fruits
Pod 5–6.5 cm × 3–5 mm, linear-cylindrical, glabrous, with a slightly curved beak.
Morphology Reproductive morphology Seeds
Seed 2–4 × 1.5–2 mm; hilum central, 0.8 mm long; without an aril.
[FZ]

IUCN Red List of Threatened Species https://www.iucnredlist.org/species/170461/1314518

Conservation
LC - least concern
[IUCN]

Sources

  • Angiosperm Extinction Risk Predictions v1

    • Angiosperm Threat Predictions
    • http://creativecommons.org/licenses/by/4.0

  • Flora Zambesiaca

    • Flora Zambesiaca
    • http://creativecommons.org/licenses/by-nc-sa/3.0

  • Herbarium Catalogue Specimens

    • Digital Image © Board of Trustees, RBG Kew http://creativecommons.org/licenses/by/3.0/

  • IUCN Categories

    • IUCN Red List of Threatened Species
    • http://creativecommons.org/licenses/by-nc-sa/3.0

  • International Legume Database and Information Service

    • International Legume Database and Information Service (ILDIS) V10.39 Nov 2011
    • http://creativecommons.org/licenses/by/3.0

  • Kew Names and Taxonomic Backbone

    • The International Plant Names Index and World Checklist of Vascular Plants 2024. Published on the Internet at http://www.ipni.org and https://powo.science.kew.org/
    • © Copyright 2023 International Plant Names Index and World Checklist of Vascular Plants. http://creativecommons.org/licenses/by/3.0

  • World Checklist of Vascular plants (WCVP)

    • The International Plant Names Index and World Checklist of Vascular Plants 2024. Published on the Internet at http://www.ipni.org and https://powo.science.kew.org/
    • © Copyright 2023 World Checklist of Vascular Plants. http://creativecommons.org/licenses/by/3.0