This family contains buckwheat, sorrel (but not wood sorrel[?]), rhubarb, and knotgrass[?]. It is named for the shape of the seed; that of rhubarb, for example, has a triangular cross-section.
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... and Russia, have been found at Dui and Kusunai in great numbers, as well as polished stone hatchets, like the European ones, primitive pottery with decorations like those ...