OregonFlora species comparison

slender;

nodes terete, 0–1 exserted.

intra- and extravaginal or mainly intravaginal.

mainly intravaginal; some extravaginal.

sheaths closed to 25% of their length;

ligules 1–3 mm;

blades flat or folded, or slightly inrolled, 0.5–2 mm wide.

sheaths closed 33–50% of their length; smooth, bases of basal sheaths glabrous;

collars smooth, glabrous;

ligules 0.5–1.5(2.2) mm, blades of tillers with upper surface moderately to densely scabrous or very short-hairy on and between the veins;

cauline blades involute, mostly filiform, 0.5–1(1.5)mm wide;

lower surfaces smooth;

upper surfaces sparsely scabrous on and between the veins; uppermost blade (0.5)1–5 cm long.

erect, contracted, 1–3 cm long, usually exserted from the sheaths;

branches erect to steeply ascending; slender; to 1.5 cm.

erect; ovoid, moderately to loosely congested, 1–5(7)cm;

spikelets fewer than 50;

branches erect to ascending, slightly lax, 0.5–3 cm, 1–2 per node.

3–4 mm, green or purple;

florets 2–3;

rachilla internodes less than 1 mm long; smooth.

to 3 times as long as wide; compact, 3–6(8)mm;

florets 2–5;

rachilla internodes glabrous or sparsely softly puberulent.

lanceolate to broadly lanceolate, 2.4– 3.6(4) mm, usually equaling or exceeding the lowest lemma, frequently exceeding the upper florets;

lower glumes 3-veined.

slightly unequal;

keels smooth or scabrous;

lower glumes 2–4 mm long, 1–3-veined; about 67% as long as the lowest lemma;

upper glumes 2.9– 5 mm long.

glabrous.

with sparse; diffuse; cobwebby hairs 1–2 mm, infrequently glabrous.

lanceolate, 2.5–3 mm long, distinctly keeled; thin, glabrous;

keels and marginal veins rarely sparsely puberulent;

tips acute.

lanceolate, 2.5– 4(4.5)mm, distinctly keeled, moderately to densely finely scabrous, glabrous throughout or keels and sometimes marginal veins proximally sparsely softly puberulent;

margins narrowly scarious;

tips acute.

0.2–0.8 mm.

vestigial and 0.1–0.2 mm or functional and 1.5–2 mm.

perennial; g ynodioecious, 7–30(35)cm tall, densely to loosely tufted, rhizomatous and stoloniferous;

rhizomes and stolons to 100 cm long.

=14.