Bush — North American Species of Triodia. 69 



lanceolate, the upper one 8 mm. long, 1-nerved, the lower 

 one rather shorter, 3-nerved; flowering scales 7-8 mm. long, 

 acute, apex 2-lobed, lobes acute, the fissure less than 2 mm. 

 long, the awn about 2 mm. long, the lateral nerves densely 

 filiate the entire length, and the midrib below; palet narrow, 

 a third as long as its scale, pubescent on the nerves, abruptly 

 acute. Rare in high plains. August to October. Perennial. 



Lower Sonoran area. Texas to Arizona, New Mexico and 

 Mexico. 



Type locality: " Chenate Mountains, Presidio County, 

 Texas; " collected by Nealley. 



Specimens examined. — Mexico: Chihuahuaj Pringle, 406, 1885. — Ca- 

 -denas, Pringle, 3930, 1891. — Texas: Chenate Mountains, Presidio County, 

 Nealley, 823; Cibolo Canon, Nealley, 154, 1892; Western Texas, Wright, 751. 



6. Triodia Nealleyi Vasey, Bull. Torr. Club. 15: 45. 1888. 



Sieglingia Nealleyi (Vasey) Dewey, Contr. U. S. Nat. Herb. 2 : 538. 



1894. 

 Tricuspis Nealleyi (Vasey) Heller, Cat. PI. N. A. 28. 1900. 



Culms 3-5 dm. tall, slender. Leaves short, blunt pointed, 

 strongly keeled; panicle lance-oblong, 3-5 cm. long; spikelets 

 5-8 flowered, 6-8 mm. long ; first empty scale nearly equal- 

 ing and second slightly exceeding the lower flowers ; flowering 

 scales linear-oblong, deeply cleft, the lobes obtuse, promi- 

 nently pubescent ; palet about one-half as long as the flower- 

 ing scale. Rare in mountain caiions. August to October. 

 Perennial. — Plate XI. 



Lower Sonoran area. Texas. 



Specimens examined. — Texas : Chenate Mountains, Presidio County, 

 Nealley, 825; Sierra Blanca, Presidio County, Nealley, 2305. 1893. 



7. Triodia pulchella H. B. K. Nov. Gen. & Sp. 1: 155. t. 

 47. 1815. 



Tricuspis pulchella (H. B. K.) Torr. Pac. R. Rept. 156. 1857. 

 Uralepis pulchella (H. B. K.) Kunth, Rev. Gram. 1 : 108. 1829. 

 Sieglingia pulchella (H. B. K.) O. Kuntze, Rev. Gen. PI. 2 : 789. 1891. 



Culms 1 dm. tall, fasciculately branched from a stolonifer- 

 ous base. Leaves 1-3 cm. long, fasciculate, involute ; pan- 

 icles short, leafy, verticillate; spikelets 5-10 flowered, 5-8 

 mm. long, white ; flowering scales 4-6 mm. long, prominently 



