Polygonum utahense

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.

Polygonum utahense is a herb up to 50 cm tall. Stems are green or brown, not wiry. Leaves are narrow, up to 4 cm long. Flowers are pink or white.