Rumex triangulivalvis is a perennial herb that is native to California, and also found elsewhere in North America and beyond.

Toxicity: Possible skin irritation from touching the leaf of this plant.
Do not eat the leaf of this plant.

Wetlands:
Arid West: Occurs usually in wetlands, occasionally in non wetlands
Mountains, Valleys and Coast: Equally likely to occur in wetlands and non wetlands

Communities: wetland-riparian, many plant communities