Trisetum filifolium Scribn. ex Beal

Trisetum filifolium Scribn.; Beal, Grasses N. Am. 2: 375. 1896
Trisetum filifolium var. aristalum Scribn.; Beal, Grasses N. Am. 2: 375. 1896. (Type from the Sierra Madre, Mexico, Pringle 1430.)
Perennial, pale or glaucous; culms loosely tufted, ascending from a more or less decumbent base, scabrous below the panicle, 50-100 cm. tall; sheaths scabrous, the lower numerous, marcescent; ligule truncate, scarcely erose, 1 mm. long or less; blades filiform, involute, scabrous, flexuous, mostly basal, 15-30 cm. long; panicle nodding, rather narrow, loose, 10-15 cm. long, the axis angled, scabrous, the branches capillary, scabrous, ascending or appressed, some of them floriferous only above the middle; spikelets 5-6 mm. long, about 3-flowered, rather turgid, the slender rachilla-joints villous; glumes rather broad, nearly equal in length and width, about 4 mm. long, glabrous; lemmas only slightly compressed, scaberulous, awnless or awned from about the middle; palea as long as or a little longer than the lemma.
Type locality: Sierra Madre, Chihuahua (Pringle 1431). Distribution: Upper altitudes, mountains of Chihuahua.

Trisetum filifolium là một loài thực vật có hoa trong họ Hòa thảo. Loài này được Scribn. ex Beal miêu tả khoa học đầu tiên năm 1887.