Calflora, a 501c3 non-profit
Distribution by County   6767    
Polygonum polygaloides  Meisn.  ssp. esotericum  (L. C. Wheeler) J. C. Hickman
Modoc county knotweed,   Whitemargin knotweed
Polygonum polygaloides ssp. esotericum is an annual herb that is native to California, and found only slightly beyond California borders.
also called Polygonum esotericum
California Rare Plant Rank: 1B.3 (rare, threatened, or endangered in CA and elsewhere).
Record Count by County

Lassen: 2 Plumas: 4 Sierra: 5
Modoc: 63 Shasta: 2 Siskiyou: 2

Suggested Citation
Calflora: Information on California plants for education, research and conservation, with data contributed by public and private institutions and individuals, including the Consortium of California Herbaria. [web application]. 2023. Berkeley, California: The Calflora Database [a non-profit organization]. Available:   (Accessed: 12/04/2023).