OregonFlora species comparison

erect to ascending.

erect or slightly decumbent.

sheaths glabrous or white-villous;

blades 1.5–4 mm wide;

upper surfaces scabrous or hairy.

sheaths glabrous, scabrous, or short- to long-hairy, those of the lower leaves often purplish;

blades 2–13(17)mm wide, usually lax and flat or sometimes involute;

upper surfaces glabrous, scabrous or with appressed hairs on the veins, sometimes with longer often spreading hairs.

5–20 cm; erect, sometimes partially enclosed in the sheath of the uppermost leaf, 2 spikelets per node or rarely 3–4 at some nodes;

internodes 3–5(8)mm;

disarticulation initially at the rachis nodes; later beneath each floret.

5–21 cm, usually erect, 2 spikelets per node or rarely 1 or 3;

internodes 4–8(12)mm;

disarticulation above the glumes and below each floret or rarely also below the glumes.

10–15 mm, divergent, 2–4 florets; lowest florets sterile and glume-like in 1 or both spikelets at each node.

8–25 mm, appressed to slightly divergent; (1)2–4(6) florets.

(10)30–100 mm including the awns; the bases hard and glabrous;

glume bodies about (2)5–10 × 1–2 mm, setaceous, 2–3-veined;

margins firm;

glume awns (8)25–90 mm; each split above the base into 3–9 unequal divisions, scabrous, flexuous to outcurving from near the bases at maturity.

75% as long as or equaling the adjacent lemmas, bases often overlapping, usually flat and thin with evident veins;

glume bodies (5)9–14(19) × 0.5–2 mm, linear-lanceolate; entire, widening above the base; (1)3–5(7)-veined, 2–3 veins extending to the tips, glabrous;

veins smooth or evenly scabrous;

margins 0.1–0.2 mm wide; whitish hyaline, tapering toward the tips;

glume awns 0–5(9) mm; straight.

fertile lemmas 8–10 mm; smooth or scabrous near the tips, 2 lateral veins extending into bristles to 10 mm;

lemma awns (10)20– 110 × 0.2 mm at the base, divergent to arching.

(8)9–14(16) mm, glabrous, scabrous, or short-hirsute;

lemma awns; if present; (0)1–30(35)mm, usually straight to flexuous, sometimes slightly curving.

1–2 mm.

1.5–3.5 mm.

=28.

=28.