Distribution: Alaska to Oregon, east across southern Canada and the northern third of the United States
Habitat: Wet places, sea level to alpine
Conservation Status: Not of concern
Stems evergreen, perennial, from black, smooth rhizomes, all alike, ascending or erect, 1-3 dm. tall and 1-2 mm. thick, branched near the base; stems 5-to 12-ridged, the ridges very shallow; stomates in 2 rows in each furrow, sunken below the level of the epidermis; central cavity 1/4 to 1/3 the diameter of the stem; sheaths 2-4 mm. long, green with black tips, the teeth with conspicuous white margins, abruptly contracted to a hair-like tip.
Cones small, up to 1 cm. long, sharp pointed.