Compilation
Aira pictigluma

Perennial, usually densely tufted, with slender intravaginal innovations. Culms erect or slightly geniculate, 1/6–2 ft. high, slender, simple, 1–2-noded below the middle, or nodeless except at the base, glabrous, smooth, eglandular, or glandular towards the panicle; uppermost internode (peduncle) at length long-exserted. Leaf-sheaths finely striate, more or less softly pubescent, or glabrous; ligule a densely ciliate rim; blade filiform or narrowly linear, subsetaceous, with a blunt tip, up to 10 in. long, but usually much shorter, involute, or opening out and up to 1 1/2 lin. wide, stiff to rather flaccid, flexuous, sparingly pubescent to loosely pilose, or glabrous, usually eglandular. Panicle narrow, erect, usually contracted and dense, or spike-like, 1/4–4 1/2 in. long, 1/4– 3/4 in. wide; rhachis smooth, eglandular, or with minute sessile glands; branches erect, paired, mostly densely spiculate from near the base, finely filiform or capillary, eglandular, or glandular like the rhachis, the lower up to 1 3/4 in. long; pedicels mostly 1/4–1 1/2 lin. long, with minutely hairy tips. Spikelets numerous, 2 1/2–3 1/2 lin. long, pale green or purplish, with whitish or yellowish tips. Glumes narrowly lanceolate in profile, acute, 1-nerved and with 2 very short lateral nerves, thinly membranous, glabrous, finely scaberulous on the keel. Valves narrowly oblong in profile, about 1 lin. long (entire part), sparingly pubescent, obscurely 7-nerved; lobes 1/6– 1/5 lin. long, each bearing a fine bristle 1/2–1 1/4 lin. long from the inner side; awn geniculate, 1 1/2–3 1/2 lin. long, with the column twisted and 3/4–1 lin. long. Valvules linear-oblong, 1–1 1/4 lin. long. Anthers 1/5– 1/2 lin. long. Grain 3/4 lin. long.