Rhizomatous. Stems 30–100 cm, rarely clustered. Leaves: blades 5–12 mm wide; basal sheaths reddish. Inflorescence open, compound-umbelliform. Spikelets 3–6 mm long. Scales 1–2.5 mm long, dark green; tip rounded to apiculate. Flowers: bristles 3–6, straight or curved, spinulose, ca. as long as the achene, white turning brown; stigmas 2. Achene 2-sided, whitish, 1–1.5 mm long (
Lesica et al. 2012. Manual of Montana Vascular Plants. BRIT Press. Fort Worth, TX).