Polygonum utahense, the Utah knotweed, is an unresolved name for a putative North American species of plants in the buckwheat family. It has been found only in the States of Utah and Arizona in the southwestern United States.Biota of North America Program 2014 county distribution map
Polygonum utahense is a herb up to tall. Stems are green or brown, not wiry. Leaves are narrow, up to long. Flowers are pink or white.Flora of North America, Polygonum utahense Brenckle & Cottam, 1940. Utah knotweed
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