Vigna oblongifolia A.Rich.

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: confident

Seed Collecting Guide. RBG Kew (2013-2016)

Morphology General Habit

Annual, more rarely Perrenial, prostrate or climbing herb, rarely suberect, usually 0.9-4.8 m long from a somewhat woody rootstock

Morphology Stem

stems slender, covered with adpressed spreading or reflexed ±bristly hairs

Morphology Leaves

leaflets ovate, oblong-lanceolate to lanceolate, up to 12 cm long, 2.2 cm wide

Morphology Reproductive morphology Inflorescences

inflorescence dense, 2-10 flowered, rhachis 0.5-2.5 cm long, somewhat zigzag and with tumid glands at the pedicel -bases

Morphology Reproductive morphology Flowers

flower standard yellow or greenish-yellow, green or sometimes purple-flushed outside, obovate, 10-11 mm long and wide, wings pale or bright yellow, keel plae yellow or greenish-white, green at the tip with the beak short, not incurved standard 10-11 mm long

Morphology Reproductive morphology Fruits

fruit pods 4-6.5 cm long, 3-5 mm wide, curved or almost straight, slightly constricted between the seeds

Morphology Reproductive morphology Seeds

greenish, brown or dark reddish-brown often mottled with black, irregularly oblong, ovoid or subglobose, sometimes angled on margin opposite the hilum, longest dimension 2-4.5 mm.

Ecology

damp grassland and SWamps, particularly with echinochloa, also acacia scrub. altitude800 - 1900 m

Distribution

Angola, Botswana, burundi, Cameroon, Democratic Republic of Congo (Zaire), Ethiopia, Kenya, Malawi, namibia, Northern Nigeria, rwanda, South Africa, Sudan, Tanzania, uganda, Zambia, Zimbabwe, madagascar.

Conservation

least concerned

Phenology

Flower (no data), fruit (no data)

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

Morphology General Habit

Annual, prostrate or climbing herb, rarely suberect, usually 0.9–4.8 m long.

Morphology Stem

Stem slender, covered with appressed spreading or reflexed ± bristly hairs.

Morphology Leaves Leaflets

Leaflets 3, 3–12 × 0.2–2.5 cm, rounded to acute and mucronulate at the apex, cuneate or rounded at the base, rather sparsely appressed pubescent on both surfaces; petiole 2–6.5 cm long; rhachis 0.3–1.5 cm long; stipules 2–4 × 0.8–1.5 mm, ovate-lanceolate, cordate and slightly prolonged below the point of insertion, multinerved.

Morphology Reproductive morphology Inflorescences

Peduncle 7–35 cm × 0.5–2 mm, often very hairy at the apex and pilose below; rhachis 0.5–2.5 cm long, 2–10-noded, internodes 2–4 mm long, rarely up to 10 mm long.

Morphology Reproductive morphology Flowers

Flower yellow, 6–12 mm long; pedicel 2–5 mm long, expanding as the pod matures; bracteoles 1–1.5 mm long, linear-lanceolate, 1-nerved.

Morphology Reproductive morphology Flowers Calyx

Calyx pubescent; tube 1–2.5 mm long; lobes 1–2.5 mm long, the upper pair joined to form an apiculate lip, lower lobe twice as long as the others.

Morphology Reproductive morphology Flowers Corolla

Standard with two central appendages; keel with a short beak, slightly twisted towards the right.

Morphology Reproductive morphology Flowers Gynoecium Ovary

Ovary 6–10-ovuled.

Morphology Reproductive morphology Fruits

Pod 2.5–7 cm × 2.5–4.5 mm, slightly compressed, curved or almost straight, slightly constricted between the seeds, covered with appressed, usually mixed pale ferruginous and white bristly hairs, with a short curved beak.

Morphology Reproductive morphology Seeds

Seed 2–4.5 × 2–3.2 × 1–2.2 mm; hilum excentric; aril excentric, fork-shaped.

International Legume Database and Information Service

Conservation

Not Threatened

Ecology

Africa: Sudanian grasslands, Somalia-Masai grasslands, Sudanian bushland and thicket, Somalia-Masai bushland and thicket, Somalia-Masai woodland, Zambezian grassland, Zambezian bushland and thicket, Zambezian woodland, Sudanian woodland

Morphology General Habit

Annual, Climbing/Not climbing, Herb

Leguminosae, J. B. Gillett, R. M. Polhill & B. Verdcourt. Flora of Tropical East Africa. 1971

Morphology General Habit

Annual, more rarely perennial, prostrate or climbing herb, rarely suberect, usually 0·9–4·8 m. long from a somewhat woody rootstock.

Morphology Stem

Stems slender, covered with adpressed spreading or reflexed ± bristly hairs.

Morphology Leaves

Leaflets 3, ovate to linear-lanceolate, 1·5–12 cm. long, 0·2–2·5(–3·5) cm. wide, rounded to acute and mucronulate at the apex, cuneate or rounded at the base, rather sparsely adpressed pubescent on both surfaces; petiole 1·5–6·5 cm. long; rhachis 0·5–1·5 cm. long; petiolules 1–3 mm. long; stipules ovate-lanceolate, 2–3 mm. long, cordate and slightly prolonged below the point of insertion.

Morphology Reproductive morphology Inflorescences

Inflorescence dense, 2–10-flowered; rhachis 0·5–2·5 cm. long, somewhat zigzag and with tumid glands at the pedicel-bases; peduncle 2–35 cm. long, often very hairy at the apex and pilose below; pedicels 2–5 mm. long; bracts deciduous, ovate-lanceolate, 1–1·5(–3) mm. long; bracteoles subpersistent, lanceolate, 1·5–2·5(–5) mm. long.

Morphology Reproductive morphology Flowers Calyx

Calyx pubescent; tube 1·5–2 mm. long; lobes triangular-lanceolate, 1–4 mm. long, the lowest narrow, the upper pair joined to form an apiculate lip.

Morphology Reproductive morphology Flowers Corolla

Standard yellow or greenish-yellow, green or sometimes purple-flushed outside, obovate, 6–10 (–11) mm. long and wide, emarginate or truncate, glabrous; wings pale or bright yellow; keel pale yellow or greenish-white, green at the tip with the beak short, not incurved.

Morphology Reproductive morphology Fruits

Pods ± deflexed, linear-cylindrical, compressed, 3–9-seeded, 2·3–6·5 cm. long, 3–5 mm. wide, curved or almost straight, slightly constricted between the seeds, covered with adpressed, usually mixed pale ferruginous and white bristly hairs.

Morphology Reproductive morphology Seeds

Seeds greenish, brown or dark reddish-brown often mottled with black, irregularly oblong, ovoid or subglobose, sometimes angled on margin opposite the hilum, longest dimension 2–4·5 mm., shorter dimension 2–3·2 mm., 1·5–2·2 mm. thick; aril eccentric, shaped like a fork with a short central prong.