General: Perennial, strongly tufted herb in large, dense clusters from compact rhizomes; stems smooth or finely lined with 30 to 60 longitudinal ridges, 30-120 cm tall.
Leaves: Reduced to short sheaths at the base of the stem.
Flowers: Inflorescence with numerous flowers and branches, 3-12 cm long, appearing as if on the side of the stem; perianth segments green or light brown, 3-6 mm long, pointed, subequal; stamens 3; anthers about as long as the filaments; involucral bract 5-25 cm long, cylindrical, resembling a continuation of the stem, smooth or finely lined with 30 to 60 longitudinal ridges.
Fruits: Capsules, egg-shaped, rounded on the tops, slightly shorter than the perianth segments; seeds ellipsoid, 0.5 mm long, lacking tail-like appendages.
Notes: Variable species with several varieties recognized in our area
1. Perianth segments greenish with little or no brownish borders, stiff when dry...................... var. pacificus Fern. & Wieg.
1. Perianth segments deep brown with green midribs, soft when dry.
2. Uppermost sheaths closed, leathery, lustrous, and chestnut brown throughout........................ var. gracilis Hook.
Moist to wet disturbed places, pastures, fields, ditches, clearings, forest margins, marshes and peat bogs in the lowland, steppe, and montane zones; common W of the Coast-Cascade Mountains; N to AK and S to MT, ID, AZ and CA; Eurasia.
A very shade-intolerant, submontane to subalpine, circumpolar rush (transcontinental in North America). Species occurs on very moist to wet, nitrogen-medium soils within subalpine boreal, temperate, and mesothermal climates. Common and often dominant in early-seral communities on water-receiving and watercollecting sites with exposed and compacted mineral soil and a fluctuating groundwater table. Frequently associated with Carex species Deschampsia caespitosa and Scirpus microcarpus. Characteristic of waterlogged sites.
Recommended citation: Author, Date. Page title. In Klinkenberg, Brian. (Editor) 2020. E-Flora BC:
Electronic Atlas of the Plants of British Columbia [eflora.bc.ca]. Lab for
Advanced Spatial Analysis, Department of Geography, University of British
Columbia, Vancouver. [Accessed:
2021-10-18 7:43:29 PM
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