Flora of North America species comparison

yellow-brown to dark brown at base, 15–60 cm.

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

sheaths hispidulous;

blades green, widest blades (3–)3.4–5.4(–6.5) mm wide, glabrous abaxially or sparsely hispidulous on midrib.

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.

0.19–0.48 of culm height;

peduncles of lateral spikes smooth or barely scaberulous;

peduncles of terminal spikes (4.2–)7.5–37(–43) mm, much exceeding lateral spikes;

proximal bract with sheath tight, abaxially scabrous, sheath front apex convex, elongated (0.6–)1.6–4.9(–6.6) mm beyond apex;

ligules 3.3–5 mm;

distal bract usually much exceeding terminal spike.

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).

3–5, separate or distal 2–4 spikes overlapping;

lateral spikes pistillate, with 2–7 perigynia, 6–29 × 3.8–6.8 mm, ratio of spike length (in mm) to flower number = 3.5–4.8;

longest terminal spikes 14–34(–42) × 1.3–3(–3.5) mm.

distichously imbricate, 52–59-veined, unwrinkled, obovoid or narrowly obovoid, obtusely triangular in cross section, (4.5–)4.6–5.6(–6.2) × 1.9–2.2(–2.3) mm, (2.1–)2.3–2.8(–3) times as long as wide, dull, base gradually tapered, apex abruptly contracted;

beak excurved, (0.5–)0.8–1.3 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.

obovoid-ellipsoid, 3.2–3.9(–4.2) × (1.6–)1.8–2.1 mm, tightly enveloped by perigynia;

stipe bent 45–70°, 0.4–0.6 mm;

beak bent more than 90°, 0.3–0.5 mm.

substipitate, 1.5–2 × 1–1.5 mm.

scales (4.1–)5.6–9.4(–11.6) × 1.6–2.6(–3.3) mm, margins whitish, denticulate, apex with awn 1.1–6.8 mm.

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.

scales 5.2–6.9 × 1.5–1.7 mm.

3.4–4.2 mm.

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.

= 44, 64.