OregonFlora species comparison

basal branching intravaginal.

mainly basal;

sheaths open, with overlapping margins, not conspicuously splitting between the veins during the first year;

collars glabrous;

ligules 0.1–0.4(0.5) mm;

blades (5)10– 20(40)cm × 0.3–0.75 mm, conduplicate; more or less lax, green;

inner surface with hairs;

outer surface glabrous, rarely minutely scabrous; flag leaves 3–12 cm.

5–20 cm;

branches spreading; the lowest usually reflexed at anthesis and remaining reflexed thereafter.

6–12 mm, with 2–5(7) florets.

hairy at tips only;

lower glumes 2–5 mm, 1-veined;

upper glumes 3–6 mm; (1)3-veined.

3–4.5 mm, densely hairy at the tip.

apex densely hairy.

(25)45–110 cm tall, densely cespitose, green.

cross sections 0.25– 0.6 × 0.35–0.75 mm; diamond-shaped or triangular;

veins (3)5– 7;

ribs 1(5); dorsal sclerenchyma bands less than twice as wide as thick.

4–6.5(8)mm, 0(1)-veined;

hairs near the tip only (rarely hairy throughout);

lemma awns 3–12 mm; some longer than the lemma body.