T: U.S.A., Washington, Clallam Co., low wet ground, south side of Route 101 near Dry Creek and Dry Creek Road, 6 air km SSE of Angeles Point, Olympic Peninsula, 140 m, 48. 6' N, 123 31' W, 27 Sep 2001, P.F.Zika 16611; holo: WTU; iso: CAN, GH, MICH, MO, NY, OSC, PRA, UBC, UC, US.
Perennials, usually 25–108 cm tall, densely caespitose; fresh upper stems shiny and smooth, green, wiry; dried stems c. (0.5–) 0.8–1.8 (–2.5) mm in diam., faintly striate with c. 16–25 ridges; subepidermal sclerenchyma strands 5–25; pith continuous, of astericiform cells. Cataphylls 3–4; upper cataphylls usually (5–) 6–15 (–18) cm long, deep brown to castaneous throughout, coriaceous, glossy, smooth, not papillose; veins inconspicuously raised, when dried cataphylls often wrinkled longitudinally, tight but deeply split; margins not overlapping; sheath apex symmetrical, rounded, firm (slightly thickened), black, glossy, sometimes slightly notched, never winged; apical veins convergent to parallel. Blade vestigial. Lower bract 3–12 (–17) cm long, much exceeding inflorescence; lower middle bract 1.8–7.0 mm long, with a narrow margin and 0.1–3.3 mm mucro. Inflorescence mostly compact and not conspicuously fastigiate, usually dense, usually 1–4 × 1–2 cm, sometimes loose and larger. Tepals ±equal, lanceolate, acuminate, dark brown with narrow greenish central band; outer tepals 2.2–2.8 mm long; inner tepals 1.8–2.6 mm long, attenuate; margins very narrow. Stamens 3; anthers c. 0.6–0.8 mm long, about equalling filaments. Capsule unilocular, trigonous-obovoid, c. 2.5 mm long, conspicuously shorter than tepals, usually obtuse and shortly mucronate, brownish. Seeds obliquely ovoid, c. 0.4–0.6 mm long, apiculate, reticulate; appendages absent. 2n = 40, 42, fide H.L.Lint, unpubl. thesis (1977); 2n = 80, J.A.Calder, D.B.Savile & R.L.Taylor 23234 (UBC) cited in R.L.Taylor & G.A.Mulligan (1968). 2n = 40, 42, fide H.L.Lint, unpubl.; 2n = 40, B.Parfitt 2336 (ASU, unpubl.); 2n = 80, fide R.L.Taylor & G.A.Mulligan, Fl. Queen Charlotte Is. 2: 43 (1968) [vouchers not seen].