sri lankan beautiful flowers

apocynaceae arranged ayurvedic basal beautiful botanical broad catharanthus centre constipation corolla dark darker description diabetes diameter distribution dysentery edible english evergreen family five flowers follicles fruit glossy green growing hairless herbaceous india lanka lankan leaves like lobes long madagascar make medicine mellitus midrib name native none oblong opposite oval pair pairs pale parts periwinkle petal petiole pink plant propagation red rheumatism roots roseus sadaphuli sanskirt seeds short sri status subshrub tall toothache treatment tube usage used white