Common Horsetail
Equisetum arvense

Family: Horsetail (Equisetaceae)
AKA: Meadow Horsetail, Field Horsetail
Photo taken on: June 10, 2006
Location: Jack's Cabin, GV, CO
Life Zones: Plains to subalpine
Habitat: Wet soil

Grows to 1½ feet in large colonies from underground rhizomes. Branches grow in whorls around the stem. Fertile stems are flesh-colored tipped with a cone like a Scouring Rush and emerge before the green sterile stems.

Flora of North America reference.