OregonFlora species comparison

100–200 cm × 5–15 mm.

sheath fronts convex (to concave) and papery at mouth;

veins reaching apex; very rarely diverging leaving triangular; veinless, membranous area;

widest blade 7–22 mm wide.

all or most spikes solitary or in clusters of 2–3(8), raised on stalks;

involucral bracts that surpass inflorescences 3–6; widest bract 4–15 mm wide.

10–40, 10–25 × 6–10 mm;

scales orange-brown to pale brown, with linear dots 7–10 × 3–4 mm;

apex notched; awns fairly stout, 2–3 × 0.5 mm wide at base.

perianth bristles tightly attached to shed achene; very stout, equaling achene;

anthers 4 mm;

stigmas 3.

grayish or dark brown, often in patches; all clearly trigonous to slightly compressed, 3.8–5.5 × 2–2.9 mm;

apex rounded;

beak 0.2–0.8 mm;

surface rather dull;

epidermal cells usually not evident at 20×; fresh achenes sink in water.

=94.