Knoxia sumatrensis (Retz.) DC. [ Knoxia stricta Gaertner]
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Knoxia sumatrensis (Retz.) DC. [ Spermacoce sumatrensis Retz.] [Rubiaceae]
J. Gaertner, Fruct. Sem. Pl., vol. 1 : t. 25 (1788)