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Catharanthus roseus
It is commonly grown in many places around the world
Native and endemic to Madagascar C. roseus is known as "noyontara" (Bengali: নয়নতারা) in Bengali, sadaphuli (Marathi: सदाफुली) in Marathi, boa-noite ("good night") and maria-sem-vergonha ("shameless maria", name shared with Impatiens and Thunbergia alata) in Portuguese (American), vinca-de-madagáscar, vinca-de-gato ("cats' vinca"), vinca-branca (white vinca), vinca or boa-noite in Portuguese (European), vinca del Cabo, vinca rosa ("pink vinca") or vinca rosada ("roseous vinca") in Spanish, putica ("little whore") in Venezuela and nityhakalyani in Tamil (Tamil: நித்யகல்யாணி பூ).
Interesting how a plant can look so similar from one continent to another; the periwinkles here look much the same.