OregonFlora species comparison

20–55 cm × 8–16 mm.

23–60(75) cm × 5–15(20) mm.

terminal;

branches ascending and drooping.

terminal;

branches spreading and ascending.

aggregated in a few dense clusters of 12–130;

spikes sessile, narrowly ovoid, 4–5 × 1.8–2.3 mm; floral scales 1.6–2.8 mm; black or brownish black with pale midribs;

apex with awn 0.4–0.6(1.2) mm.

in dense clusters of (1)3–18 spikes, sessile; ovoid or narrowly ovoid, 2–8 × 1–3.5 mm; floral scales 1.1–3.4 mm, green or black;

apex rounded or acute to mucronate; mucro 0–0.2 mm.

perianth bristles persistent, 6; rather stout; straight or curved; longest bristles equaling achene, with retrorse teeth in distal 0.3–0.5, enclosed within floral scales;

stigmas 3.

perianth bristles persistent; (3)4(6) per flower; straight or curved; shorter than to 1.5 times as long as achene, retrorsely spinulose almost to base, enclosed within (occasionally weakly projecting from) floral scales;

stigmas 2(3).

plumply trigonous or plano-convex, 0.8–1.2 × 0.4–0.6 mm.

biconvex to plano-convex, 0.7–1.6 × 0.8–1 mm.

=56.

=64, 66.