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Fabaceae-Faboideae  family

Crotalaria pallida
Aiton var. obovata (G. Don) Polhill
, Kew Bull. 22: 265.  1968.
Bas.: Crotalaria obovata G. Don (1832).

Naturalized very common herb of open and semi-open dry and moist areas.
Probably southern tropical Africa. Now pantropical.
By far the most common Crotalaria with 3 leaflets and yellow flowers. (See also  C. incana, C. lotifolia, C. zanzabarica.)