Distribution: Circumboreal; throughout the Pacific Northwest
Habitat: Moist to wet areas, lowlands to moderate elevations in the mountains
Conservation Status: Not of concern
Rhizomatous, evergreen perennial, the stems all alike, mostly unbranched, 2-15 dm. tall and 4-14 mm. thick, with 18-40 ridges, each ridge with 2 rows of tubercles; central cavity at least 3/4 the diameter of the stem; stomates in 2 lines in each furrow; sheaths 5-15 mm. long, black banded at the tip and also with a lower black band, ashy- gray between the black bands, green below the lower band.
Cones short-pedunculate, 1-2.5 cm. long, sharp pointed.