Much like no. 22 [Carex muricata L.]; roots brown or blackish-brown; basal sheaths at first pale brown, becoming dark to blackish-brown; ligule short and blunt, usually wider than long; infl looser and more elongate, 3–10+ cm, the lowest spikes often 1–3 cm apart; perigynia appressed-ascending (or the lowest ones spreading), 3.5–4.5 mm, usually less than half as wide, ± equally narrowed to both ends, not corky; 2n=56, 58. Native of Europe, established in disturbed sites from Mass. to D.C. and Ont. (C. virens)