Flora of North America species comparison

lateral, erect or ascending, usually overtopping vegetative shoots, 24–54 cm × 0.7–1 mm.

to 30 cm.

basal sheaths purple, 7–18 mm;

blades erect or ascending, evergreen, midrib and 2 lateral veins strongly developed, 14–42 cm × 8–32 mm, older leaves often shriveling or dead at tips.

blades 1.5–3.5 mm wide.

spikes 3–5 per culm, scattered;

peduncle of pistillate spikes erect or spreading, rarely drooping, exserted 0–18 mm;

bracts from middle and proximal portions of culms reduced, 0.8–2 cm × 2–3.5 mm.

1–12 cm, proximal internodes 5–50 mm;

peduncles of proximal spikes to 5 cm;

proximal bracts with blade 0–15(–40) mm, sheath cylindric, (3–)4–22 mm, mouth 0.5–1.2 mm wide.

(2–)3–4(–5);

lateral spikes pistillate, the proximal inclined or pendent, 6–21 × 3–6 mm;

terminal spike gynecandrous, rarely staminate, pendent, 8–10 × 3.5–5 mm.

(4–)9–13(–15) per spike, overlapping, finely veined, elliptic, 3.7–4.9 × 1.6–2 mm;

beak constricted.

ascending, pale brown proximally, black or dark brown distally, veins indistinct, lanceolate, 3.3–5.5 × 0.9–1.3(–1.4) mm, margins ciliate, glabrous;

beak indistinct.

ascending from achene through entire orifice.

ovoid, 2.2–2.7 × 1.5–1.9 mm, sides flat to slightly concave at maturity, tightly fitting in perigynia.

obovoid, 1.5–2 × 0.9–1 mm.

spikes the proximal basal, 8–30 × 4–7 mm.; pistillate scales slightly keeled, 3.2–4.2 × 1.8–2.2 mm, midribs green, margins hyaline with purple outward, apex cuspidate to acuminate to acute.

scales black or brown with pale, weak midvein and very narrowly scarious margins, ovate, 2.8–4.2 × 1.4–2.4 mm, apex obtuse to acuminate.

spike 1, pedunculate, oblanceolate to linear, 8–20 × 2–3.5 mm.; staminate scales 3–6 × 1.5–2 mm, midveins green or purple, margins dark purple, apex obtuse.

scales brown to black with pale midvein and scarious margins, oblong-obovate to obovate, 3–5 × 1.4–1.8 mm.

3.2–4.2 mm.

1.2–2.7 mm.

= 50, 52.