Flora of North America species comparison

3–6 cm (fl), elongating to 6–100 cm (fr).

dark maroon at base; flowering stems 40–90 cm, much longer than leaves at maturity, 0.5–1 mm thick, sparingly pilose.

sheaths adaxially strongly copper colored distally, truncate to convex at mouth, prolonged 2–8 mm beyond base of blade;

ligules 1.2–5.8(–9.2) mm;

foliage leaf blades 6–50 cm × 2–3 mm.

basal sheaths maroon, bladeless, pilose;

others grading from maroon to green on back, pale to chestnut brown-hyaline and usually red dotted on front, ciliate at apex;

blades flat, 2.5–9 mm wide, pilose on both surfaces, sparsely so adaxially, margins smooth or ciliate.

bisexual or, sometimes, nearly or wholly unisexual, flexuous and interrupted, proximal 1–5 branches often separated, decompound, 3–8(–9) × (0.4–)0.8–1.8 cm;

basal branch with (2–)4–10 spikes;

proximal internode 7–26(–33) mm.

peduncles of lateral spikes capillary, 10–20 mm, glabrous or pubescent;

peduncle of terminal spike erect, 3–5 mm;

proximal bracts hyaline, reduced to green awn or less often leaflike and 0.3–1.5 mm wide;

sheaths usually less than 3 mm (to 10 mm).

appressed or ascending, straw colored to light or dark brown, strongly 6–9-veined abaxially, with or without median lengthwise groove near base, sometimes membranous flap toward apex, lance-ovate (body ovate to very widely ovate) in outline, plano-convex, (2.1–)2.3–3(–3.3) × (1–)1.1–1.4 mm, dull;

beak 0.8–1.4 mm.

light green, usually red dotted, 2-ribbed and 5–7-veined, at least proximally and abaxially, loosely enveloping achene, ellipsoid, 2.5–5 × 1.3–2.5 mm, membranous, base acute, apex tapering to beak, glabrous;

beak bidentate to 1.5 mm, teeth 0.5 mm, ciliate between apical teeth.

broadly or very broadly trullate-ovate in outline, 1.2–1.6 × 0.7–1 mm.

substipitate, 1.5–2 × 1–1.5 mm.

scales light reddish brown, 2.4–3.3 × (1.1–)1.4–2.1 mm, as wide as or wider than perigynia.

scales hyaline suffused with chestnut with broad green midrib, ovate, shorter to nearly as long as mature perigynia, apex acute to cuspidate, awns less than 1 mm, often ciliate distally.

spikes 2–4, 1 per node, mostly near apex but not crowded, drooping at maturity, pistillate with 10–40 perigynia attached 1 mm apart, narrowly cylindric, 8–25 × 4–5 mm.

spike staminate, sessile or pedunculate, 10–30 × 1.4–3 (4) mm.

= 66.

= 44, 64.