blackie sweet potato vines, ipomoea batatas ‘sweetheart jet black', on garden

beauty blackie blackie sweet potato botanical botany brazil convolvulaceae dark foliage flora garden gardening grass green ipomoea ipomoea batatas batatas leaf leaves natural nature organic ornamental plant purple purple purple-black ribeirao preto ribeirão sao paulo potato vine sweetheart jet black são tropical tropics vegetable vines