Redroot Flatsedge, Red-root Flatsedge, Red-rooted Flatsedge
Cyperus erythrorhizos
Synonyms: Cyperus cupreus, Cyperus erythrorhizos var. cupreus, Cyperus halei, Cyperus occidentalis, Cyperus washingtonensis
![Redroot Flatsedge, Red-root Flatsedge, Red-rooted Flatsedge: Cyperus erythrorhizos (Synonyms: Cyperus cupreus, Cyperus erythrorhizos var. cupreus, Cyperus halei, Cyperus occidentalis, Cyperus washingtonensis)](erythrorhizos/erythrorhizos2d.jpg)
Redroot flatsedge as seen on a muddy bank along a slough that runs northeast from the Sandy River to the banks of the Columbia River at the east side of the Sandy River delta, Troutdale, Washington.........September 29, 2012.
- ![Redroot Flatsedge, Red-root Flatsedge, Red-rooted Flatsedge: Cyperus erythrorhizos (Synonyms: Cyperus cupreus, Cyperus erythrorhizos var. cupreus, Cyperus halei, Cyperus occidentalis, Cyperus washingtonensis)](erythrorhizos/erythrorhizos2c.jpg)
- ![Redroot Flatsedge, Red-root Flatsedge, Red-rooted Flatsedge: Cyperus erythrorhizos (Synonyms: Cyperus cupreus, Cyperus erythrorhizos var. cupreus, Cyperus halei, Cyperus occidentalis, Cyperus washingtonensis)](erythrorhizos/erythrorhizos2e.jpg)
Additional images of redroot flatsedge as seen on a muddy bank along a slough that runs northeast from the Sandy River to the banks of the Columbia River at the east side of the Sandy River delta, Troutdale, Washington.......September 29, 2012.
![Redroot Flatsedge, Red-root Flatsedge, Red-rooted Flatsedge: Cyperus erythrorhizos (Synonyms: Cyperus cupreus, Cyperus erythrorhizos var. cupreus, Cyperus halei, Cyperus occidentalis, Cyperus washingtonensis)Redroot Flatsedge, Red-root Flatsedge, Red-rooted Flatsedge: Cyperus erythrorhizos (Synonyms: Cyperus cupreus, Cyperus erythrorhizos var. cupreus, Cyperus halei, Cyperus occidentalis, Cyperus washingtonensis)](erythrorhizos/erythrorhizos08-31-2015.jpg)
What appears to be redroot flatsedge as seen on mudflats on the Columbia River shoreline along the Washougal Dike, Columbia River Gorge.......August 31, 2015.
Paul Slichter