Wildflowers Found in Oregon

Scouring Rush (Horsetail)

Equisetum hyemale - Stems all alike, unbranched, stout, evergreen, hollow (the central cavity taking up 3/4 or more of the stem), bluish-green, to usually also with black bands at the tip and the middle or at the base, the teeth dark brown to blackish; rhizomes creeping, slender, blackish, deep in the soil.Cones are short-stalked, to 2.5 cm long, hard-pointed, persistent. Common on moist to wet sites, often along major streams and rivers with connections east of coastal mountains, on open sandbars as well as in shaded alluvial forests, also in disturbed habitats such as roadsides, railway embankments and oil fields; at low to middle elevations; uncommon north of 51 degrees north.