Catharanthus roseus wani nau'in tsiro ne wanda aka fi sani da Madagascar periwinkle. Ya fito ne a Madagascar amma ana noma shi sosai kuma an daidaita shi a yankuna masu zafi da na wurare masu zafi a duniya. Ana daraja shukar ne saboda furanni masu ban sha'awa da kuma magunguna, saboda tana ɗauke da alkaloids waɗanda aka yi amfani da su don magance cututtuka daban-daban da suka haɗa da ciwon daji da ciwon sukari.