OregonFlora species comparison

nodes terete or slightly compressed, 1–2(3) nodes exposed.

mainly extravaginal or equally extra- and intravaginal.

intravaginal and extravaginal or mainly intravaginal.

sheaths closed 25–50% of their length, bases of basal sheaths glabrous;

collars smooth, glabrous;

ligules truncate to rounded, 0.9–2(3.1)mm, blades of extravaginal shoots like cauline blades, those of intravaginal shoots; when present, sometimes distinctly narrower; flat to involute, 0.4–1 mm wide;

cauline blades flat or folded; to involute on the margins, 0.4–4.5 mm wide;

lower surfaces smooth, glabrous;

upper surfaces smooth or sparsely scabrous, frequently with sparse; slender hairs 0.2–0.8 mm long; uppermost blades 1.5–10 cm.

sheaths closed up to 33% of their length, ligules of cauline leaves 1–3 mm, ligules of uppermost tiller leaves 0.5–2.5 mm long, blades of tillers with upper surface scabrous, minutely hairy, or puberulent on and between the veins;

cauline blades folded to involute; uppermost blades 1–2 mm wide.

narrowly ovoid to narrowly or broadly pyramidal, loosely contacted to open, sparsely to moderately congested, 2–15(20)cm;

spikelets (25)30–100+;

branches spreading; (1)2–9 cm long; (1)2–7(9) per node;

spikelets 4–30(50), usually fairly crowded in distal half.

erect, narrowly lanceoloid, contracted, moderately congested, 3–6 cm;

branches erect; slender; to 1.5 cm, 1–2 per node.

4.2–7 mm, often purple;

florets 2–4;

rachilla internodes 1–1.5 mm long; smooth, sometimes sparsely hispidulous.

lanceolate; (3.3)4.3– 5.7 mm;

lower glumes shorter than to equal to the lowest lemma, 3-veined;

upper glumes frequently longer than the lowest lemma, 3–5-veined, not exceeding the upper florets.

glabrous.

narrowly lanceolate, 4.1–5.8 mm; more or less keeled; thin, glabrous or sometimes puberulent;

tips acute.

usually 0.8–1.2(1.7)mm, occasionally aborted late in development.