Carex haydeniana
in S. Watson, Botany (Fortieth Parallel), 366. 1871.
Plants densely cespitose. Culms 9–30 (–40) cm. Leaves: sheaths adaxially white-hyaline, sometimes cross-corrugate adaxially, summits usually U-shaped, sometimes prolonged to 3 mm beyond collar; distal ligules 0.3–2 mm; blades 3–4 (–5) per fertile culm, 3–16 cm × 1.5–4 mm. Inflorescences dense, dark-brown, green and brown, or gold, 1.1–2.1 cm × 13–18 mm; proximal internode 1–2.5 (–3.4) mm; 2d internode 0.5–2 mm; proximal bracts scalelike, shorter than inflorescences. Spikes 5–7 (–9), aggregated, individually indistinct broadly ovoid, 6.5–10 × 4.5–8 mm, base and apex usually rounded. Pistillate scales reddish or coppery to dark-brown, sometimes with whitish or pale gold midstripe, narrowly ovate to ovate, 3–4.8 mm, shorter and narrower than perigynia, apex acute to obtuse. Perigynia ascending to ascending-spreading, light-brown to coppery or dark-brown, conspicuously 0–3 (–8) -veined adaxially, lanceovate to broadly ovate, flat except over achene, 4–6.5 × 1.5–2.6 mm, 0.3–0.5 mm thick, margin flat, including wing 0.3–0.6 (–0.8) mm wide, ciliate-serrulate at least on distal body; beak dark-brown to black, white-hyaline at tip, cylindric, unwinged, at least 1 mm, ± entire for 0.3–0.6 mm, abaxial suture inconspicuous or with conspicuous white margin, distance from beak tip to achene (2.3–) 2.6–3.8 mm. Achenes elliptic or ovate, (1.2–) 1.4–1.8 × 0.8–1.1 (–1.3) mm, 0.3–0.45 mm thick. 2n = 82.
Phenology: Fruiting summer.
Habitat: Rocky or gravelly subalpine to alpine meadows, slopes, stream banks
Elevation: 1700–4300 m
Distribution
Alta., B.C., Calif., Colo., Idaho, Mont., Oreg., Utah, Wash., Wyo.
Discussion
See comment under 110. Carex microptera.
Selected References
None.
Lower Taxa
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