Trisetum cernuum Trin.

Trisetum cernuum Trin. Mem. Acad. vSt.-Petersb. VI 1:61. 1830.
Avena nulkaensis Presl, Rel. Haenk. 1: 254. 1830. (Type from Nootka Sound, Vancouver Island,
Haenke.) Avena cernua Kunth, R4v. Gram. Suppl. XXVI. 1830. (Based on Trisetum cernuum Trin.) Tnselum Sandhergit Beal, Grasses N. Am. 2: 378. 1896. (Tvpe from Mount Stuart, Washington,
Sandberg if Leiberg 823.) Triselum nutkaense Scribn. & Merr.; Davy. Univ. Calif. Publ. Bot. 1: 63. 1902. (Based on Avena
nulkaensis Presl.) Trisehim cernuum var. luxurians Louis-Marie, Rhodora 30: 213. 1928. (Type from Seaside,
Oregon, Shear &■ Scribner 1705.) Trisehim cernuum var. luxurians f. pubescens Louis-Marie, Rhodora 30: 213. 1928. (Type from
Eureka, California.) Triseltim cernuum var. Sandbergii Louis-Marie, Rhodora 30: 214. 1928. (Based on T. Sandbergii
Beal.) Trisetum cernuum f. pubescens G. N. Jones. Univ. Wash. Publ. Biol. 5: 108. 1936. (Based on T.
cernuum var. luxurians f. pubescens Louis-Marie.)
Perennial; culms rather lax, glabrous, often scaberulous below the panicle, 60-120 cm. tall; sheaths glabrous, scabrous, or sparsely pilose; ligule truncate, erose-dentate, 2-4 mm. long; blades thin, flat, lax, scabrous, 6-12 mm. wide; panicle open, lax, drooping, 15-30 mm. long, the axis more or less scabrous, the branches verticillate, filiform, flexuous, scabrous, spreading or drooping, spikelet -bearing toward the ends; spikelets 6-12 mm. long, with usually 3 distant florets, the first longer than the second glume, the slender curved rachilla-joints nearly 2 mm. long, Wllous, the hairs of the callus 0.5-1 mm. long; first glume narrow, acuminate, 1-nerved, 0.5-2 mm, long, the second broad, 3-nerved, 3-4 mm. long, occasionally reduced; lemmas glabrous or slightly scaberulous, 5-6 mm. long, the teeth setaceous; awn slender, curved, flexuous or loosely spiral, mostly 5-10 mm. long, attached 1-2 mm. below the tip.
Type locality: Sitka, Alaska.
Distribution: Moist woods. Alberta to southeastern Alaska, and southward to western Montana and northern California.