Flora of North America species comparison

acutely angled, 50–150 cm, scabrous.

10–90 cm.

basal sheaths red-brown;

sheaths of proximal leaves bladeless, scabrous, fronts with red-brown spots, prominently ladder-fibrillose, apex red-brown, U-shaped, occasionally thickened;

blades 4–6 mm wide.

blades 1–3.5 mm wide.

proximal bract shorter than or subequal to inflorescence, 3–4.5 mm wide.

3–12(–22) cm;

proximal internodes 10–60(–100) mm;

peduncles of proximal spikes to 8 cm;

proximal bracts with blades 5–140 mm, sheaths cylindric, 5–25(–35) mm, mouth 0.9–1.5 mm wide.

erect; staminate 2(–3); pistillate 3–4;

proximal pistillate spike 1.6–10.8 cm × 3–5 mm, base cuneate or attenuate.

3–8;

lateral spikes androgynous or pistillate, rarely some entirely staminate, the proximal inclined or pendent, 5–30 × 3–7 mm;

terminal spike staminate or androgynous, 10–28 × 1.8–4 mm.

ascending, pale brown, occasionally with red-brown spots on apical 1/2, 0–5-veined on each face, somewhat flattened, loosely enclosing achenes, ovoid, 1.7–3.4 × 0.8–1.8 mm, dull, apex acute or obtuse, papillose;

beak thickened, 0.1–0.2 mm.

ascending, pale yellow proximally, brown or black distally, 3–9-veined, lanceolate, 3.5–5.5 × 1.1–2.4 mm, margins ciliate-serrulate distally, apex tapered, shortly setose, sometimes setae confined to veins, or subglabrous;

beak indistinct, to 0.5(–1) mm.

not constricted, dull.

obovoid, 1.7–2.2 × 1–1.3 mm.

scales red-brown, shorter than perigynia, apex acute, awnless.

scales brown to black, oblong-obovate, 3–5.8 × 1.1–2 mm, apex obtuse to acute, sometimes shortly awned.

scales brown or black with hyaline margins, oblong-ovate, 3.1–6.2 × 1–3 mm.

1.5–3 mm.

= 66, 68.