OregonFlora species comparison

intra- and extravaginal or mainly intravaginal.

mostly 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 25–67% of their length; smooth or sparsely scabrous;

ligules 1.5– 4(6)mm;

blades flat, 1–4 mm wide.

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

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

lax; open; sparse, 5–15 cm;

branches spreading to reflexed; capillary; (2)3– 8 cm, 1–3(5) per node, usually moderately scabrous, with (3)4– 15 spikelets.

3–4 mm, green or purple;

florets 2–3;

rachilla internodes less than 1 mm long; smooth.

lanceolate or narrowly lanceolate, 4–8 mm, green, or partly purple to dark purple;

florets 2–5.

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.

tapered from the base or lanceolate; thin;

keels usually scabrous;

lower glumes 1-veined;

upper glumes distinctly shorter than to nearly equaling lowest lemma.

glabrous.

with sparse cobwebby hairs.

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

keels and marginal veins rarely sparsely puberulent;

tips acute.

lanceolate, 3–4 mm, often partly purple, distinctly keeled; thin; smooth, or sparsely scabrous near the tip;

keels softly puberulent to long-villous on 25–67% the length; marginal veins softly puberulent to long-villous;

hairs frequently sparse;

lateral veins and area between veins glabrous;

margins infolded;

tips sharply acute to acuminate, usually bronze-colored.

0.2–0.8 mm.

0.2–1.1 mm.

=14.

=42.