Periwinkle(SadaBahar)Evergreen is a one-year or multi-year herbaceous plant that is commonly grown in India on orchards or on land as ornamental plants in gardens. The plant is native to the Madagascar country of the African continent, where it grows wild in tropical rain forest. Due to the continuously declining population of this plant in Madagascar, a country of vast biodiversity (megadiversity), the International Nature and Natural Resources Conservation Association (OUCN) declared it as 'Endangered' Red Data Book. Is listed in Transferred agriculture is the main reason for its declining population.... See more