[The Horsetail Family West of the Cascade Mountains of Oregon and Washington]

Giant Horsetail, Great Horsetail

Equisetum telmateia var. braunii

Synonym: Equisetum maximum

Giant Horsetail, Great Horsetail: Equisetum telmateia var. braunii (Synonym: Equisetum maximum)

A close-up of the fertile stalk of giant horsetail as seen along the Springwater Trail near Palmblad Road to the east of Gresham, OR..........April 13, 2017.

The fertile stalk of Giant Horsetail, Great Horsetail: Equisetum telmateia var. braunii (Synonym: Equisetum maximum) - Giant Horsetail, Great Horsetail: Equisetum telmateia var. braunii (Synonym: Equisetum maximum)

A close-up of the teeth at several joints on the fertile stalk of giant horsetail as seen along the Springwater Trail near Palmblad Road to the east of Gresham, OR.........April 2, 2011. The teeth are clustered into groups of two to four.

Paul Slichter