Neonotonia wightii, the perennial soybean, is a species of flowering plant in the family Fabaceae, native to sub‑Saharan Africa, Yemen, India, and Sri Lanka, and widely introduced as a forage in Brazil, Bolivia, Paraguay, northern Argentina, the Mascarene Islands, Peninsular Malaysia, Java, New Guinea, Queensland and New South Wales in Australia, and Fiji.

[1][2] It is shade tolerant.

[3] The following subtaxa are accepted:[1]

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