Herbs or shrubs; leaves alternate, sometimes opposite or whorled, entire; sripules forming a sheath around the stem (ochrea); flowers are small and regular, no petals; sepals sometimes petal-like; fruit an achene, lens-shaped or 3-4-angled.
Eriogonum pyrolifolium
Polygonum bistortoides
Polygonum newberryi
Rumex acetosella
Rumex crispus