OregonFlora species comparison

acutely quadrangular; (30)45–105 cm × (1)2–5.4 mm.

subterete to slightly compressed; to 2 times wider than thick, 5–15 cm × 0.2–0.5(1.2) mm; culm tufts often proximally bulbous (if bulbous then tunicated by papery-fibrous scales).

(15)20–76 × 3–5(6) mm;

proximal scale empty; amplexicaul; (1)2.2–5.4 mm; floral scales (28)45–135, 2–3 per mm of rachilla; (4)4.5–6.2 × 2.8–5 mm;

apex rounded to obtuse.

with proximal internodes shorter and thicker than those in the middle of the spike, 3–8 × 1.5– 4 mm;

proximal scale subtending a flower; seldom empty, 2–5 mm, 50% or more as long as spike; floral scales 3–10 per spike, 2.5–6 × 1.5–2.5 mm.

perianth bristles 6–7, often markedly unequal; shorter than achene or some equaling tubercle;

anthers 2.3–2.9 mm;

stigmas 3, sometimes 2.

perianth bristles (0)3–6, often unequal; rudimentary to equaling tubercle;

anthers 1.5–2.7(3.5) mm;

stigmas 3.

biconvex, 1.8–3 × 1.3–2 mm; almost smooth to markedly sculptured at 10–15×; each face with 19–38 rows of almost linear, transversely elongated cells; which are sometimes isodiametric at achene base.

equilaterally trigonous to compressed-trigonous, rarely some biconvex, 1.6–2.3 × 0.7–1.3 mm.

persistent;

apex narrowly acute to acuminate, sometimes prolonged into a blade-like portion to 8 cm.

apex often reddish, subtruncate to acute.

deltoid to high-pyramidal or lanceoloid, 0.7–1.5 × 0.4–1 mm, often spongy.

rarely absent, 0.3–0.4 × 0.2–0.3 mm.