Photographer: from USDA Plants website
Rumex triangulivalvis (Danser) Rech.f.
Rumex: the ancient Latin name for the docks or sorrels
triangulivalvis: possibly referring to having one or more three-angled or triangular valves
|Plant: ||perennial, to 40" tall, smooth forb often with several branches; taprooted|
|Flower: ||6-parted, stalks jointed near the base; inflorescence a 4"-12" branched cluster with small leaves near the base of the few branches|
|Leaf:||flat, pale green or smooth, narrowly lance-shaped|