Aira capillaris

Aira capillaris Host, Gram. Austr. 4: 20. 1809
Avena capillaris Mert. & Koch, in Roehl. Deuts. Fl. ed. 3. 1: 573. 1823. (Based on Aira capillaris
Host.) Airopsis capillaris Schur, Oesterr. Bot. Zeits. 9: 328. 1859. (Based on Aira capillaris Host.) Fussia capillaris Schur, Enum. PI. Transsilv. 754. 1866. (Based on Aira capillaris Host.) Airella capillaris Dumort. Bull. Soc. Bot. Belg. 7: 68. 1868. (Based on Aira capillaris Host.) Aspris capillaris Hitchc. Bull. U. S. Dep. Agr. 772: 116. 1920. (Based on Aira capillaris Host.)
Culms slender, erect or geniculate at the base, glabrous, 7-35 cm. tall; sheaths retrorsely scabrous; ligule acute, 2-3 mm. long; blades very narrow, lax, scaberulous; panicle open, as much as 10 cm. long, sometimes nearly as broad, the very slender axis glabrous below, the capillary branches and branchlets spreading; glumes broad, acute or mucronate, 1.5 mm. long; first lemma awnless, acute; second lemma bisetose, awned from below the middle, the awns geniculate, 2 mm. long.
Type locality: Europe.
Distribution: Open ground on the Coastal Plain, rare, Maryland to Florida and Texas; Oregon and California; also in the Mediterranean region.