[Horsetails and Scouring-rushes: The Genus Equisetum in the Cascade Mountains of Oregon and Washington]

The photo above shows the blunt-tipped cone of smooth scouring-rush as seen in moist soils along an irrigation canal along the Willard Springs Trail at Conboy Lake National Wildlife Refuge.........July 28, 2006. The image at right shows smooth scouring-rush in the irrigation canal along the Willard Springs Trail at Conboy Lake NWR..........August 10, 2007.

The photo at left shows the black-tipped teeth atop a sheath of smooth scouring-rush as seen in moist soils along an irrigation canal along the Willard Springs Trail at Conboy Lake National Wildlife Refuge.........July 28, 2006. The sheaths at each joint do not have a black band below the teeth as in some other horsetails. Note also that the number of teeth is the same as the number of ribs at the sheath. The image at right shows smooth scouring-rush as seen in a dry stream bed meandering across prairie adjacent to Lakeside Rd in Conboy Lake NWR..........August 10, 2007. Note that the sheaths are banded with black only along the upper edge.

Additional close-up images of smooth scouring-rush as seen in small stream that meanders through Swampy Meadows on the west side of Mt. Adams, Gifford Pinchot National Forest..........August 30, 2012.

Smooth scouring-rush as seen at left in a meandering stream in the middle of Swampy Meadows at the southwest corner of Mt. Adams...........August 8, 2004. The photo at right shows smooth scouring-rush in wetlands along the Willard Springs Trail, Conboy Lake National Wildlife Refuge......October 19, 2020.