Flora of North America species comparison

trigonous, 20–100 cm × 0.8–2.5 mm, glabrous.

trigonous, 15–48 cm × 0.4–1 mm, glabrous.

5–10, V-shaped to flanged V-shaped, 10–70(–90) cm × 2–7 mm, margins and midribs scabridulous or glabrous.

flat, 10–30 cm × 0.5–2 mm.

spikes 1(–6), densely cylindric, 6–30 × 5–11 mm;

rays 3–12, 0.4–5(–7) cm;

rays and rachis glabrous; usually only 1–2 spikes of inflorescence on elongate rays, other spikes sessile or nearly so;

bracts 4–7, horizontal to slightly ascending, 1–16 cm × 0.5–4 mm;

rachilla deciduous, wings persistent, 0.5 mm wide.

spikes rather densely ovoid, 1–3.5 cm;

rays 0 (sometimes 1–4), 1–6 cm;

rachis 1–4 mm;

bracts 3–4, horizontal to slightly reflexed, flat, 6–25 cm;

rachilla ± deciduous, wingless.

20–80, ellipsoid, roughly quadrangular, 3–5 × 1–1.4 mm;

floral scales 1–2(–4), appressed, stramineous to golden brown, often red-speckled, medially greenish, 9-ribbed, elliptic to ovate, 2.4–3.4 × 1.8–2.6 mm, apex obtuse.

25–60, compressed, oblong-lanceoloid, 5–12 × 2.2–3.5 mm;

floral scales deciduous, 5–15, yellowish to yellowish brown, laterally 4–5-ribbed, oblong-ovate, 2.6–3.6 × 1.4–2 mm, margins loosely spreading or clasping achene.

anthers 0.4–0.6 mm;

styles 0.7–1.1 mm;

stigmas 1.4–2.1 mm.

anthers 0.8–1 mm;

styles 1 mm;

stigmas 1.5–2.5 mm.

dark brown to reddish brown, sessile, broadly ellipsoid, 1.8–2.1 × 0.8–1 mm, apex apiculate, surfaces glabrous to finely puncticulate.

dark grayish brown, sessile, narrowly oblong, 1.8–2.2 × 0.5–0.8 mm, apex obtuse, apiculate, surfaces puncticulate.