Bush — North American Species of Triodia. 67 



midnerve excurrent in a short scabrous point. Dry prairies 

 and barrens; not common. September and October. Per- 

 ennial. 



Louisianian and Lower Sonoran areas. Kansas to Texas, 

 New Mexico and Arizona. 



Type locality not ascertained. 



Specimens examined. — Kansas: Kiowa County, Hitchcock, 916, 1896. — 

 Texas: San Antonio, B^xslt County, Nealley,Gi, 1892; Crab Apple, Gillespie 

 County, Jenny, 17; Fort Worth, Tarrant County, Glatfelter, 1898; San 

 Antonio, Bexar County, Bush, 1250, 1900; Marion, Guadalupe County, Hall, 

 1872; Dallas County, Bush, 1171, 1900; no locality given, Lind/ieimer, 737, 

 1847. 



3. Triodia congesta (Dewey) B. F. Bush. 



Sieglingia congesta Dewey, Contr. U. S. Nat. Herb. 2 : 538. 1894. 

 Tricuspis congesta (Dewey) Heller, Cat. PI. N. A. 28. 1900. 



Culms 4-8 dm. tall, from a perennial rootstock. Nodes 

 and throats of striate sheaths usually purple ; leaves 5-15 cm. 

 long ; panicle 5-8 cm. long ; rays single, 1-3 cm. long, crowded 

 with sessile spikelets; spikelets 10-15-flowered, 8-12 mm. 

 long, turgid ; lower scales slightly shorter than the adjacent 

 flowers, 1 -nerved; flowering scales 4-5 mm. long, ovate- 

 oblong, obtuse, mucronate, the lateral nerves slightly or not 

 at all excurrent, pubescent on the nerves near the base ; palet 

 one-fourth shorter than the flowering scale, the keels promi- 

 nently arcuate near the base. Plains and rocky barrens; 

 not common. September to October. Perennial. — Plate X. 



Lower Sonoran area. Texas. 



Type locality: "Corpus Christi, Texas;" collected by 

 Nealley. 



Specimens examined. — Corsicana, Navarro County, Beverchon, 2558; 

 Dallas County, Beverchon, 121, 1879; Corpus Christi, Nealley, 2i, 1891, 

 1893; Guadalupe, Wright; Comanche Peak, Hood Conntj, Beverchon, 3456, 

 September. July. 



4. Triodia pilosa (Buckley) B. F. Bush. 



Uralepis pilosa Buckley, Proc. Phila. Acad. Nat. Sci. 1862 : 94. 1863. 

 Tricuspis acuminata Munro, A. Gray, Proc. Phila. Acad. Nat. Sci. 1862: 



335, name only. 1863. 

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

 Sieglingia acuminata (Munro) O. Kuntze, Rev. Gen. PL 2: 789. 1891. 



