African yam bean
Sphenostylis stenocarpa
A West African legume grown for both its edible seeds and tuberous roots.
Family
Fabaceae
Temperature
23-29°C (absolute 15-35°C)
Rainfall
1000-1200mm (absolute 800-1400mm)
Altitude
2000m
Soil pH
5.5-6 (absolute 4.5-7)
Soil types
Fertile, well-drained loamy soils.