Calystegia spithamaea

Calystegia spithamaea, which common names include: low false bindweed, low bindweed, erect bindweed, and upright bindweed, is a plant.
Conservation status in the United States.
It is listed as threatened in Maine and Vermont and endangered in Massachusetts and New Jersey. It is listed as a species of special concern in Connecticut, where it is believed to be extirpated. 