OregonFlora species comparison

basal branching intravaginal.

with nodes hidden.

mostly basal;

sheaths open, glabrous to hairy, usually pale (white, pink, light brown) and lacking contrasting veins, crumbling or somewhat splitting between the veins but not shredding;

blades readily spinning between the fingers;

collars glabrous;

ligules 0.3–0.6 mm;

blades (5)8– 25(35)cm × 0.3–1 mm as folded, conduplicate, usually glaucous, sometimes green;

outer surface scabrous, sometimes with long hairs;

inner surface with hairs about as long as the leaf is thick; flag leaves (1.5)3–7(9.5) cm, usually conduplicate, sometimes loosely rolled.

mainly basal;

sheaths pale, glabrous, papillose, conspicuous at the base of the plant and persisting for more than 1 year; entire, forming a dense tuft of split tubes at the base of the plant;

collars glabrous;

ligules 0.1–0.5 mm;

blades 0.5–1.1 mm wide when tightly folded, 1.6–2.5(3)mm wide when flat or loosely rolled; somewhat stiff;

outer surface papillose;

inner surface with long hairs; flag leaves 2.5–7.5 cm.

s (5)7– 12(20) cm; open at anthesis; lowest node with 1–2 branches;

branches (5.8)7.5–17(19)mm, ascending to reflexed at anthesis, appressed after anthesis or the lower branches sometimes remaining spreading to reflexed.

5–18 cm; lowest node with 1–3 spreading branches 2.5–7(13)cm.

(5.8)7.5–17(19)mm, with (2)3–7(9) florets.

8–12(16) × 2.5–7 mm, with (3)4–5(7) florets.

glabrous or hairy at the tips only;

lower glumes (2.5)3–5(6)mm, 1–3-veined;

upper glumes (3)4–8 mm, 3–4-veined.

glabrous or scabrous at the tips;

lower glumes 4.5–7.5(8.5)mm, 1(3)-veined;

upper glumes 5.3–8.2(9) mm; (1)3-veined.

4–4.5 mm, glabrous.

3.5–4.5 mm; hairy at the tip.

apex glabrous.

apex hairy.

cross sections 0.35–0.6 × 0.55– 0.7 mm; more or less round or hexagonal;

veins (4)5(6);

ribs (1)3(5); dorsal sclerenchyma in broad bands more than twice as wide as thick, occasionally continuous.

(5.8)6–8(10)mm, 0(1)-veined;

hairs on the distal part only;

lemma awns (1)2–6(7) mm; shorter than to occasionally equaling the lemma body.

(6.2)7– 8.5(10)mm; (0)5-veined, slightly scabrous throughout, rarely glabrous;

lemma awns 0.5–1.5 mm.

(2.5)3.2–4(4.5) mm.

(3.3)4.5–6 mm.

=28.