OregonFlora species comparison

bulbous at the base;

nodes terete.

nodes terete, 0–1 exserted.

intravaginal.

extra- and intravaginal.

sheaths closed about 25% of their length;

basal sheaths swollen at the base;

ligules 1–3 mm;

blades flat, 1–2.5 mm wide; soon withering.

sheaths closed 33–50% of their length, bases of basal sheaths glabrous, collars of at least some leaves usually sparsely short-hairy;

ligules 1–2 mm, blades of tillers to 40 cm long;

upper surface moderately to densely scabrous or minutely hairy on and between the veins;

cauline blades involute, 1–3 mm wide;

lower surfaces smooth;

upper surfaces sometimes sparsely hairy;

blades much reduced higher on the culm; uppermost blades 1–4.5 cm.

ovoid, 3–12 cm;

branches 2–5 per node, ascending to spreading.

erect to nodding, lanceoloid to ovoid, loosely contracted; sparse, 4–8 cm;

spikelets 18–60;

branches ascending; lax, 3–8 cm long, 1–2 per node, with 3–8 spikelets.

3–5 mm;

florets 3–7, commonly all or all but the lowest producing bulblets, occasionally all producing seeds.

6–9(11)mm; to 3 times as long as wide;

florets 2–5(7);

rachilla internodes 1–2 mm long.

keels scabrous;

lower glumes 3-veined;

upper glumes shorter than or subequal to lowest lemma.

subequal;

lower glumes 3-veined.

with cobwebby hairs or glabrous.

with diffuse; soft cobwebby hairs about 50% as long as the lemma.

lanceolate, 3–4 mm, distinctly keeled, glabrous throughout, or keels and marginal veins shortto long-villous; area between veins glabrous or softly puberulent;

tips acute.

lanceolate, 4–6(7)mm, distinctly keeled, glabrous throughout; smooth or sparsely to moderately finely scabrous;

keels scabrous;

tips acute.

developed and 1.4–2 mm, or aborted late in development, or not developed.

vestigial and 0.1–0.2 mm, or 2–3 mm.

=21–42.

=28.