Mountain sorrels is a genus of plants in the family Polygonaceae with three accepted species as of spring 2019. It has a circumboreal distribution. Species of mountain sorrels are perennial herbaceous plants or weakly shrubby. They spring have rhizomes. Their stems are erect variably branched. Undivided leaves are present both at the base of the plant and on the stems. They are arranged alternately and have stalks (petioles). The inflorescences are terminal paniclelike or racemelike borne on stems (pedunculate). Individual flowers are either bisexual or unisexual with four greenish to reddish brown tepals. The fruits are in the form of achenes with broadly winged margins.