buckwheat family

American  

noun

1. the plant family Polygonaceae, characterized by herbaceous plants, vines, shrubs, and trees having stems with swollen joints, simple leaves, small, petalless flowers, and fruit in the form of an achene, and including the buckwheat, dock, knotweed, rhubarb, sea grape, and smartweed.

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buckwheat family

Rhubarb is part of the buckwheat family, which also includes plants like Japanese knotweed and sorrel.

From Salon ● Mar. 20, 2022