Polygonaceae: Buckwheat Family. Identify plants and flowers.
It matures as a dry seed, usually brown or black and triangular or lens-shaped, sometimes with wings. Worldwide, there are about 40 genera and 800 species, including 15 genera in North America. Sour juice, from oxalic acid, is common in this family. Many plants of this family also contain tannic acid and anthraquinone glycosides.
DA: 66 PA: 72 MOZ Rank: 57