Accepted By:
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Puff, C. & D. E. Mantell. 1982. Revision and affinities of Galium (Rubiaceae) in Madagascar. Pl. Syst. Evol. 140: 57–73.
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Puff, C., E. Robbrecht & V. Randrianasolo. 1984. Rubiaceae - Alberta, Nematostylis. Distrib. Pl. African. 27: 907–914.
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