76 Trans. Acad. Set. of St. Louis. 



Nation, Bush, 1445, 1895.— Ohio: Cincinnati, Lloyd, 585, 1890.— New 

 Jersey: Camden, Parker, ^Wi, 1863.— Oklahoma: Stillwater, Waugh, &i, 

 1893.— North Carolina: Cherokee, Swain County, Beardslee <fi Kofoid, 

 1891.— Tennessee: Point Rock, A'earney, 957, 1857. — Illinois: Augusta, 

 Mead, 1843. — Mississippi: Woodville, Joor, 1888. — Pennsylvania: 

 Manayunk, Redjleld, 9415, 1870.— Florida: Tallahassee, i^as/i, 2406, 1895.— 

 New York: Harlem, F. S. P., 1859. 



17. Triodia mutica (Torr. ) Benth. ex Wats. Proc. Am. 



Acad. 18 : 180. 1883. 



Tricuspis mutica Torr. Pac. R. R. Rept. 4 : 156. 1857. 



Sieglingia mutica (Torr.) 0. Kuntze, Rev. Gen. PI. 2: 789. 1891. 



Culms 3-5 dm. tall, slender, wiry. Leaves mostly invo- 

 lute, rather rigid; panicle 1-2 dm. long, branches appressed, 

 spikelets 5-8-flowered, 8-10 mm. long ; lower scales nearly 

 equal, shorter than the lower flowers; flowering scales oblong, 

 entire or emarginate, prominently pubescent near the base, 

 nearly twice as long as the palet. Dry hills and barrens. 

 June to October. Uncommon. Perennial. 



Lower Sonoran area. Texas and Colorado to Arizona and 

 Mexico. 



Type locality not ascertained. 



Specimens examined. — Texas : Dallas County, Beverchon, 239. — Ari- 

 zona: Tucson, Pringle, 13925, 1881; Fort Whipple, Palmer, 584, 1865.— 

 Mexico: Monterey, Pringle, 1980, 1888. 



18. Triodia elongata (Buckley) B. F. Bush. 



Uralepsis elongata Buckley, Proc. Phila. Acad. Nat. Sci. 1862: 189. 1863. 

 Tricuspis trinerviglumis Munro, A. Gray, Proc. Phila. Acad. Nat. Sci. 



1862 : 333, name only. 1863. 

 Triodia trinerviglumis (Munro) Benth. ex Vasey, Gr. U. S. 35. 1883. 

 Sieglingia trinerviglumis (Munro) O. Kuntze, Rev. Gen. PI. 2 : 789. 1891. 

 Sieglingia elongata (Buckley) Nash, Britt. & Brown, 111. Fl. 3. append. 



504. 1898. 

 Tricutpis elongata (Buckley) Heller, Cat. PI. N. A. 28. 1900. 



Culms 3-9 dm. tall, tufted, erect, rough, the sterile shoots 

 about one-half as long as the culms. Sheath rough, a ring 

 of hairs at the apex; leaves rough, usually involute when dry, 

 7.5-25 cm. long, 2-4 mm. wide; panicle narrow, 1.25-2.5 

 dm. long, 1.25 cm. wide, its branches erect, 3.75 cm. long or 

 less; spikelets 10-12-flowered, 9-12 mm. long, the empty 

 scales scabrous, the first 1-nerved, the second 3-nerved ; flower- 



