[Horsetails and Scouring-rushes: The Genus Equisetum in Mt. Adams Country]

Smooth Horsetail, Smooth Scouring Rush

Equisetum laevigatum

Synonyms: Equisetum funstonii, Equisetum kansanum, Equisetum laevigatum ssp. funstonii, Hippochaete laevigata

Smooth Horsetail, Smooth Scouring Rush: Equisetum laevigatum (Synonyms: Equisetum funstonii, Equisetum kansanum, Equisetum laevigatum ssp. funstonii, Hippochaete laevigata)

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.

Smooth Horsetail, Smooth Scouring Rush: Equisetum laevigatum (Synonyms: Equisetum funstonii, Equisetum kansanum, Equisetum laevigatum ssp. funstonii, Hippochaete laevigata)

The photo above 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.

Smooth Horsetail, Smooth Scouring Rush: Equisetum laevigatum (Synonyms: Equisetum funstonii, Equisetum kansanum, Equisetum laevigatum ssp. funstonii, Hippochaete laevigata)

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.

Smooth Horsetail, Smooth Scouring Rush: Equisetum laevigatum (Synonyms: Equisetum funstonii, Equisetum kansanum, Equisetum laevigatum ssp. funstonii, Hippochaete laevigata) - Smooth Horsetail, Smooth Scouring Rush: Equisetum laevigatum (Synonyms: Equisetum funstonii, Equisetum kansanum, Equisetum laevigatum ssp. funstonii, Hippochaete laevigata) - Smooth Horsetail, Smooth Scouring Rush: Equisetum laevigatum (Synonyms: Equisetum funstonii, Equisetum kansanum, Equisetum laevigatum ssp. funstonii, Hippochaete laevigata)

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 Horsetail, Smooth Scouring Rush: Equisetum laevigatum (Synonyms: Equisetum funstonii, Equisetum kansanum, Equisetum laevigatum ssp. funstonii, Hippochaete laevigata)

Smooth scouring-rush as seen in a meandering stream in the middle of Swampy Meadows at the southwest corner of Mt. Adams...........August 8, 2004.

Paul Slichter