Comprehensive DescriptionRead full entry
DescriptionErect perennial herb or subshrub, up to 1.5 m. A native of tropical America, it is widespread in the tropical world, where it is cultivated as a nitrogen-enricher. Leaves 3-foliolate with small hairs on both surfaces and longer hairs on the veins below. Inflorescences terminal and axillary, up to 30 cm long. Flowers blue-mauve or pink, occasionally blue-green. Pods up to 3.2 cm, glandular hairy, often twisted at the constrictions between the articles.