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Related to black bindweed: Polygonum convolvulus
Fast growing invasive edible weed used historically as food source. A vine that wraps clockwise around other plant stems with triangular, heart-shaped leaves and small green-white-pink flower clusters. Seeds and leaves edible, but has oxalic acid, which steaming can help lower. Not he same as true Bindweeds, which have bigger trumpet-like flowers, including Morning Glory (Convolvulaceae),
Edible Plant Guide © 2012 Markus Rothkranz