Flora of North America species comparison

15-65 cm, erect to ascending, usually puberulent;

nodes 4-6, mostly concealed, glabrous.

60-90 cm tall, about 2 mm thick.

evenly distributed;

sheaths glabrous or white-villous;

auricles usually present, 0.5-1.5 mm;

ligules to 1 mm, truncate, entire or lacerate;

blades 1.5-4(5) mm wide, often ascending and involute, adaxial surfaces scabrous, pilose, or villous.

somewhat basally concentrated;

sheaths smooth or scabridulous;

auricles to 1.5 mm;

ligules 0.5-0.7 mm, rounded;

blades 2-2.5 mm wide, those of the basal leaves 7-15 cm long, those of the flag leaves 2-7 cm long, abaxial surfaces smooth or scabridulous, glabrous or sparsely hairy basally, veins not evident, adaxial surfaces scabrous, sometimes with scattered hairs, veins prominently and equally ribbed.

5-20 cm long, 5-15 cm wide, erect, sometimes partially enclosed at the base, with 2 spikelets per node, rarely with 3-4 at some nodes;

internodes 3-5(8) mm long, 0.1-0.3 mm thick at the thinnest sections, glabrous beneath the spikelets.

8-14 cm long, about 5 cm wide including the awns, about 1 cm wide excluding the awns, nodding, lower nodes with 1-2 spikelets, upper nodes with 1 spikelet;

internodes about 10 mm;

disarticulation in the rachises and beneath each floret.

10-15 mm, divergent, with 2-4 florets, lowest florets sterile and glumelike in 1 or both spikelets at each node;

disarticulation initially at the rachis nodes, subsequently beneath each floret.

subequal, (10)30-100 mm including the awns, the bases indurate and glabrous, glume bodies (2)5-10 mm long, 1-2 mm wide, setaceous, 2-3-veined, margins firm, awns (8)25-90 mm, each split into 3-9 unequal divisions, scabrous, flexuous to outcurving from near the glume bases at maturity;

fertile lemmas 8-10 mm, smooth or scabrous near the apices, 2 lateral veins extending into bristles to 10 mm, awns (10)20-110 mm long, about 0.2 mm wide at the base, divergent to arcuate;

paleas 7-9 mm, veins usually extending into about 1 mm bristles, apices acute to truncate;

anthers 1-2 mm.

22-31 mm including the awns, glume bodies 5-10 mm, midvein evident, scabrous, awns 17-26 mm, divergent, scabrous;

lemmas 11-13 mm, smooth, awns 20-40 mm, divergent, sometimes strongly divergent;

anthers about 2 mm long, 1-1.5 mm thick.

from late May to June.

= 28.