Madagascar periwinkle

Madagascar periwinkle (plural Madagascar periwinkles)

1. The rosy periwinkle, Catharanthus roseus.
   • 2018 February 24, Jonathan Watts, The Guardian‎:

     This is even more apparent outside, where clove and cinnamon trees tower over plants that guides say are vital for the global pharmaceutical industry, such as Catharanthus roseus, the Madagascar periwinkle, which is used in diabetes and cancer treatments, and Mimosa pudica, which is being studied by researchers working on drugs to slow the onset of Alzheimer’s disease.