OregonFlora species comparison

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

1–20, trigonous, 2–16 cm × 0.5–0.8 mm.

(2)7–22 cm × 2.2–4 mm.

(1)5–10(15) × 0.5–2.5 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 usually densely head-like to cylindric, 1, loosely to densely ovoid to oblong, 6–20(40) × 9–15(20) mm;

rays absent or 1–3(6), 0.4–4 cm; longest inflorescence bracts more or less erect.

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.

(2)6–20(40); ovoid-lanceoloid to oblong; somewhat compressed, 2.5–10(20) × 1.3–2.2 mm (excluding awns); greenish to reddish brown;

rachilla more or less deciduous; wingless; floral scales deciduous; (4)10–20(34), oblong-lanceolate; (1.2)1.3–1.8(2.2) × (0.5)0.7–0.8(1) mm; greenish to stramineous or brownish red with greenish mid-stripe; (5)7–9(11)-ribbed nearly to margins;

apex awned; the strongly outcurved awn an additional 0.5–1(1.3) mm.

anthers 0.1 mm;

styles 0.1 mm;

stigmas 0.1–0.3 mm.

anthers 0.2–0.3 mm;

styles 0.3–0.5 mm;

stigmas 0.4–0.7 mm.

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

base cuneate.

obovoid (occasionally linear-spatulate or linear-oblong), 0.7–0.8(1.1) × (0.2)0.3–0.4(0.5) mm;

stipe 0.05–0.1 × 0.1 mm.