Native to Madagascar, the Madagascar periwinkle has been spread worldwide as a cultivated ornamental. It may now be found naturalized in almost every tropical and subtropical region of the world, occurring on every continent except Antarctica and on many islands. No single available distribution map reflects its complete range; for example, no specimens from Papua New Guinea are present in the dataset used to generate the map on this page.
USDA PLANTS profile for Catharanthus roseus
van Bergen, M. A. 1996. Revision of Catharanthus G. Don. Series of revisions of Apocynaceae XLI. Wageningen Agricultural University Papers 96-3: 9-46.
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