Vigna pygmaea R.E.Fr.

Species

Angiosperms > Fabales > Fabaceae > Vigna

Characteristics

Leaflets 3, 1–8 × 0.5–3 cm, elliptic-to linear-oblong, acute at the apex, rounded or subcordate at the base, almost glabrous or with short appressed bristly pubescence on both surfaces; tertiary venation parallel; petiole 1.5–8 cm long; rhachis 1–6 mm long; stipules 2–11 × 1–1.8 mm, lanceolate, almost truncate or slightly bilobed at the base, 3-nerved to multinerved, much more reduced in size on leafless stems than on leafy stems.
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Short erect pyrophytic herb with several stems 3–15 cm tall, flowering when quite leafless, arising from slender underground rhizomes 1–1.5 mm thick (but sometimes swollen into a small knot at ground level) which in turn bear beneath them slender fusiform tubers up to 6 × 1 cm.
Calyx glabrescent to densely covered with white and blackish-brown appressed or spreading bristly pubescence; tube 2–3 mm long; lobes subequal, 1–4 mm long, the upper pair joined for a half to a third of their length.
Flower pale to deep mauve or violet, 9–12 mm long; pedicel 1–3 mm long, not expanding as the pod matures; bracteoles 1.2–1.5 × 0.5 mm, lanceolate, 3–5-nerved.
Pods 3–4 cm × 2.5–3 mm, linear-cylindrical, densely covered with short appressed or spreading bristly white and dark brown pubescence, with a curved beak.
Standard with 2 parallel widely spaced appendages and two smaller internal appendages; keel without a beak, slightly twisted towards the left.
Inflorescence axillary although appearing terminal; peduncle 0–17 cm × 0.3–0.8 mm; rhachis 1–3-noded, internodes 1–20 mm long.
Seed 2–2.5 × 2–2.5 mm; hilum central, 0.5 mm long; rim aril not developed.
Stem weakly pubescent.
Ovary 8–11-ovuled.
Life form perennial
Growth form herb
Growth support free-standing
Foliage retention deciduous
Sexuality hermaphrodite
Pollination -
Spread -
Mature width (meter) -
Mature height (meter) 0.03 - 0.15
Root system rhizome
Rooting depth (meter) -
Root diameter (meter) -
Flower color
Blooming months -
Fruit color -
Fruiting months -
Nitrogen fixer rhizobia
Photosynthetic pathway c3

Environment

Light -
Soil humidity -
Soil texture -
Soil acidity -
Soil nutriment -
Hardiness (USDA) 9-12

Usage

Uses -
Edible -
Therapeutic use -
Human toxicity -
Animal toxicity -

Cultivation

Mode -
Germination duration (days) -
Germination temperacture (C°) -
Germination luminosity -
Germination treatment -
Minimum temperature (C°) -
Optimum temperature (C°) -
Size -
Vigor -
Productivity -

Distribution

Vigna pygmaea world distribution map, present in Angola, Burundi, Mozambique, Malawi, Tanzania, United Republic of, Zambia, and Zimbabwe

Conservation status

Vigna pygmaea threat status: Least Concern

Identifiers

LSID urn:lsid:ipni.org:names:525490-1
WFO ID wfo-0000189086
COL ID 5BDSQ
BDTFX ID -
INPN ID -
Wikipedia (EN)
Wikipedia (FR)

Synonyms

Vigna pygmaea