OregonFlora species comparison

1–15, trigonous, 7–30 cm × 1.2–2.5 mm; soft (flattened in pressing).

5–40(95) cm.

(2)7–22 cm × 2.2–4 mm.

3–20(30) cm × 1.5– 3 mm.

clusters head-like; dense, 7–17(35) mm wide;

rays (0)1–5, 2–32 mm; longest inflorescence bract erect or nearly so, appearing as continuation of culm; other bracts horizontal to ascending.

clusters densely head-like; ovoid to hemispheric, 7–16(20) mm diameter;

rays (0)1–2, 0.3–4.5 cm;

inflorescence bracts 2–3; horizontal to reflexed downward.

30–120, oblong-ellipsoid, compressed; (2)3–5(6) × 0.8–1.2 mm; greenish brown to purplish brown; floral scales (6)12–20(30), obovate to orbiculate, 0.6–0.8 × 0.6–0.8 mm, stramineous to deep purple with clear margins; mid-stripe greenish, stramineous, or purplish;

lateral ribs 0; medial ribs 3;

apex mucronulate.

(3)5–25(60), linear to oblong-linear, compressed; (3)5–9 × 1.8–2.3 mm; floral scales 4–18, closely imbricate; ovate to orbiculate, 1.5–2.1 × 1.4–2.2 mm; chestnut brown; black, or brown, medially green or greenish brown, laterally ribless, medially 2(3)-ribbed, distinctly 2-keeled basally;

apex obtuse.

anthers 0.1 mm;

styles 0.1 mm;

stigmas 0.1–0.3 mm.

anthers 0.6–0.8 mm;

styles 0.4–0.6 mm;

stigmas 0.7–2.1 mm.

obovoid-ellipsoid, 0.6–0.8 × 0.3–0.4 mm (as long as subtending scale);

base cuneate.

ellipsoid, 1.2–1.4 × 0.6–0.8 mm, with network of ridges forming isodiametric or square cells.