SYN: Vinca rosea.
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per·i·win·kle 'per-i-.wiŋ-kəl n any of several trailing or woody evergreen plants of the dogbane family (Apocynaceae) esp ROSY PERIWINKLE
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peri·win·kle (perґe-wing″kəl) 1. any of several woody herbs of the genus 2. Vinca. Vinca rosea.Medical dictionary. 2011.