Scientific NameDioscorea oppositifolia
Other Common Names:
Synonyms (former Scientific Names):
Alternate or lower leaves opposite and ovate with a long tapering point, concave sides, and heart-shaped base (cordate). Leaves have 9 to 13 distinct veins. Leaves are thin and without hairs (glabrous) or nearly so above, pubescent or sometimes glabrous beneath. Petioles often longer than the blades. New leaves often have a bronze 'tint'.
Herbaceous or slightly woody twining vines with fleshy or woody rootstocks, winding upward from left to right to approximately 13 feet in length.This weed is often confused with wild yam, however the vines of wild yam twine upwards from the right to the left, while those of cinnamon vine twine from the left to the right. Cinnamon vine is also commonly confused with the morningglory species. However, the distinct leaf veination and bronze 'tint' of newer leaves help to distinguish this weed from most morningglories.
Flower Seed Head
Greenish-yellow, nearly sessile, in spikes or panicles at the ends of branches, from June-August.
Membranous, 3-angled capsule, approximately 3/4 to 1 1/4 inches long and 3/4 inch in diameter
Found especially throughout the piedmont and mountainous areas of the southeastern United States.
Thorns or Spines
Approximate Flower Diameter
Dominant Flower Color
longer than leaf
Stem Cross Section
round or oval