Vigna luteola (Jacq.) Benth.

Papilionaceae, Hutchinson and Dalziel. Flora of West Tropical Africa 1:2. 1958

Morphology General Habit

A twiner

Morphology Reproductive morphology Flowers

Yellow flowers

Ecology

In waste places.

International Legume Database and Information Service

Conservation

Not Threatened

Ecology

Africa: Afromontane grassland, Zambezian grassland, Lake Victoria regional transition zone; grasslands, Sudanian grasslands, Zambezian freshwater swamp and aquatic vegetation, Somalia-Masai freshwater swamp and aquatic vegetation, Guineo-Congolian freshwa

Morphology General Habit

Perennial, Climbing, Herb

Vernacular

Antaka, Dalrymple Vigna, Famehifary, Telouravy, Vahipoko, Vahisanjy

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

Morphology General Habit

Twining or trailing perennial herb 1.8–6 m long.

Morphology Stem

Stem sparsely covered with appressed hairs to densely covered with spreading ferruginous hairs, glabrescent.

Morphology Leaves Leaflets

Leaflets 3, 2.5–10 × 0.6–4.5 cm, ovate-lanceolate to lanceolate, more rarely linear-lanceolate, acute to obtuse and mucronate at the apex, rounded or cuneate to truncate at the base, sometimes slightly lobed or subhastate, sparsely pubescent to hairy on both surfaces; petiole 1.5–8.5 cm long; rhachis 0.5–1.8 cm long; stipules 2–5 × 1.5–2 mm, ovate to linear-lanceolate, bilobed at the base, multinerved.

Morphology Reproductive morphology Inflorescences

Peduncle 12–35 cm × 0.8–3 mm, glabrous; rhachis 1.5–5.5 cm long, 5–15-noded, internodes 1–8 mm long.

Morphology Reproductive morphology Flowers

Flower yellow, 12–20 × 14–22 mm; pedicel 3–7 mm long, expanding as the pod matures; bracteoles 1.5–4 × 1 mm, ovate-lanceolate to linear-lanceolate, 1–3-nerved.

Morphology Reproductive morphology Flowers Calyx

Calyx glabrescent to densely hairy; tube 2–4 mm long; lobes 1.5–4 mm long; the lower one almost twice as long as the others, the upper pair united into an acute, rounded and mucronate, or slightly bilobed lip.

Morphology Reproductive morphology Flowers Corolla

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

Morphology Reproductive morphology Flowers Gynoecium Ovary

Ovary 7–12-ovuled, rarely 13–14-ovuled (in Lake Tanganyika area).

Morphology Reproductive morphology Fruits

Pods 5.5–8 cm × 4–6.5 mm, linear, slightly compressed, curved, slightly constricted between the seeds, sparsely to densely covered with spreading ferruginous hairs, with a short curved beak.

Morphology Reproductive morphology Seeds

Seed 3.5–4.5 × 3–3.5 × 2–2.5 mm; hilum almost central, 1.5 mm long, oblong; rim aril not or scarcely developed.

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

Morphology General Habit

Perennial climber, 1·2–2·4 m. long.

Morphology Stem

Stems tough, creeping and bearing adventitious roots below; upper parts glabrescent to rather densely covered with adpressed or spreading hairs.

Morphology Leaves

Leaflets 3, ovate, ovate-elliptic or ovate-lanceolate, more rarely linear-lanceolate, 2·5–10(–11) cm. long, 0·4–5 cm. wide, acute or acuminate at apex, rounded or cuneate at base, sparsely pubescent on both surfaces; venation raised and ± reticulate; petiole 2–8 cm. long; rhachis 0·5–1·2 cm. long; petiolules 2–3 mm. long; stipules ovate-lanceolate, 3–4 mm. long, 2 mm. wide, prolonged below the point of insertion and shortly bilobed at the base.

Morphology Reproductive morphology Inflorescences

Inflorescences axillary, few-flowered; rhachis 1·5–5 cm. long; peduncles 5–40 cm. long; pedicels 4–9 mm. long; bracts deciduous, ovate-lanceolate, 1·5–2 mm. long; bracteoles ultimately deciduous, ovate-lanceolate, 1·5–2 mm. long, 1·5 mm. wide, 1-nerved.

Morphology Reproductive morphology Flowers Calyx

Calyx pubescent or glabrescent; tube 3–4 mm. long; lobes deltoid, 2–4 mm. long, the upper pair united into an acute mucronate or rarely divided lip.

Morphology Reproductive morphology Flowers Corolla

Standard yellow or greenish, sometimes tinged red outside, oblate, 1·3–2·5 cm. long, 1·2–2·6 cm. wide, emarginate, glabrous; keel-beak short, obtuse.

Morphology Reproductive morphology Fruits

Pods linear, 4–8 cm. long.

Note

Rare variants of 14, V. parkeri Bak. subsp. acutifoliola Verdc. with blue flowers would key here but can be distinguished by their short broad fruits, see couplet 46. 5–6·5 mm. wide, very slightly constricted between the 6–9(–12) seeds, sparsely to rather densely adpressed pubescent.

Morphology Reproductive morphology Seeds

Seeds dark red-brown or grey-brown speckled with black, oblong or ovoid-rhomboid, longest dimension 3–6 mm., shorter dimension 3–4 mm., 2–3·5 mm. thick; hilum oblong; rim-aril not or scarcely developed.

Bernal, R., G. Galeano, A. Rodríguez, H. Sarmiento y M. Gutiérrez. 2017. Nombres Comunes de las Plantas de Colombia. http://www.biovirtual.unal.edu.co/nombrescomunes/

Vernacular

frisol de vaca, melusca

Bernal, R., Gradstein, S.R. & Celis, M. (eds.). 2015. Catálogo de plantas y líquenes de Colombia. Instituto de Ciencias Naturales, Universidad Nacional de Colombia, Bogotá. http://catalogoplantasdecolombia.unal.edu.co

Distribution

Nativa en Colombia; Alt. 0 - 1600 m.; Amazonia, Andes, Islas Caribeñas, Llanura del Caribe, Orinoquia, Pacífico, Valle del Cauca, Valle del Magdalena.

Morphology General Habit

Hierba, trepadora

Conservation

Preocupación Menor

IUCN Red List of Threatened Species https://www.iucnredlist.org/species/170450/1314034

Conservation

LC - least concern

Use

Forage, Weed