Flora of North America species comparison

often ascending or spreading, 4-angled or sometimes terete, sometimes sulcate, 1–7 cm × 0.2–0.3 mm, soft to firm.

2–35 cm × 0.3–1 mm.

sheaths stramineous, distal sheaths often splitting abaxially, slightly inflated distally, oblique, apex acute.

apex of distal leaf sheath obtuse to acute, tooth to 0.2 mm.

ovoid, 1.5–4 × 0.8–2 mm, apex acute;

floral scales 4–15, 8 per mm of rachilla, colorless or reddish brown, midrib region green, ovate-lanceolate, not folded lengthwise, 1–1.5 × 0.5–0.7 mm, mibrib obscure to somewhat keeled, apex narrowly acute to acuminate, slightly recurved.

ovoid, 2–8 × 2–4 mm, apex acute (to blunt);

floral scales 25–100+, ca. 10 per mm of rachilla, orange-brown, rarely stramineous, ovate, 1.5–2 × 1 mm, midribs often keeled in distal part of spikelet, apex rounded to subacute.

perianth bristles absent;

anthers 0.3–0.5 mm.

perianth bristles present, rarely absent, (5–)6–7, brown, fairly slender, exceeding tubercle;

stamens 2(–3);

anthers brown, 0.3 mm;

styles 2-fid or some 3-fid.

with angles and longitudinal ridges ca. 6–10, rather prominent, broadly ovoid, less than 2 times longer then wide, (0.55–)0.65–0.75 × 0.3–0.4 mm, apex blunt, trabeculae distinct, 20–30.

0.75–1 × 0.6–0.85 mm.

grayish, mostly appressed, pyramidal, often depressed, 0.1–0.2 × 0.1–0.25 mm.

deltoid, 0.3–0.5 × 0.3–0.5 mm, 3/5 of to as high as wide, 1/3–2/3 as high and 1/2–3/4 as wide as achene.

= 10.