Vigna subterranea (Image: S. Wood, RBG Kew)
This species has Orthodox seeds - dry to 15-20% eRH and store at -20ºC, or as cool as possible.
Germinate on agar, germination paper or sand at constant temperatures of 25 or 30ºC, or using an alternating temperature regime of 30/20ºC.
After fertilisation, the tip of the peduncle bends towards soil and excavates a tunnel, drawing in the developing pods. The pods continue to develop underground.
The fruits (2 cm) are rounded, usually 1-seeded but occasionally 2-seeded. The seeds (1.5 cm) are round, smooth and hard, varying in size. The hilum is white, surrounded by a black eye. The fruits become wrinkled at maturity.
See more images of this species at the Digital Atlas of Economic Plants.
(Image: S. Wood, RBG Kew)
Accepted name: Vigna subterranea (L.) Verdc.
Synonyms: Voandzeia subterranea (L.) Thou.
Common name: bambara groundnut
References and Links
- Food and Agriculture Organization of the United Nations and International Plant Genetic Resources Institute (1994). Genebank Standards. FAO/IPGRI, Rome, Italy.
- International Seed Testing Association (2010). International Rules for Seed Testing: edition 2010. ISTA, Bassersdorf, Switzerland.
- Purseglove, J.W. (1968). Tropical Crops: dicotyledons. Longman Group Ltd., UK.
- AFPD (African Flowering Plants Database) - Conservatoire et Jardin Botaniques de la Ville de Genève, Switzerland, and South African National Biodiversity Institute, Pretoria, RSA: Vigna subterranea.
- PROTAbase (Plant Resources of Tropical Africa) - Wageningen, Netherlands: Vigna subterranea.
- SID (Seed Information Database) - Royal Botanic Gardens, Kew, UK: Vigna subterranea.
- Tropicos - Missouri Botanical Garden, USA: Vigna subterranea.