OregonFlora species comparison

0.5–0.7 mm thick;

nodes 0–1 exserted.

intra- and extravaginal or mainly intravaginal.

intravaginal.

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 40–60% of their length, bases of basal sheaths glabrous;

collars smooth, glabrous;

ligules (1)2–4 mm long; hyaline; smooth, sterile shoot ligules like those of the culm leaves, blades of tillers with lower surfaces smooth or sparsely scabrous;

cauline blades flat, folded or involute, 0.5–1(1.5)mm wide, usually soon withering; smooth or sparsely scabrous.

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

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

erect to lax, lanceoloid to ovoid or pyramidal, contracted to open, 1–5(8) cm;

spikelets (1)6–17(22);

branches erect to spreading; slender, 1–4 cm, 1–2 per node, with 1–2(3) spikelets.

3–4 mm, green or purple;

florets 2–3;

rachilla internodes less than 1 mm long; smooth.

broadly lanceolate to broadly ovate; to 3 times as long as wide, 4–8 mm;

florets 2–3;

rachilla internodes glabrous.

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.

thin; somewhat shiny;

lower glumes 3-veined, distinctly shorter than the lowest lemma.

glabrous.

glabrous.

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

keels and marginal veins rarely sparsely puberulent;

tips acute.

lanceolate, 3.5–7 mm, distinctly keeled, thinly membranous; smooth or scabrous, glabrous;

tips acute to truncate and erose.

0.2–0.8 mm.

vestigial and 0.1–0.2 mm, or 1.3–3 mm.

=14.