Bush — NortJi American Species of Triodia. 71 



one-third shorter than the flowering scale. Mountains and 

 hills; common. August to October. Perennial. 



Lower Sonoran area. Louisiana and Texas to Arizona, 

 New Mexico and Mexico. 



Type locality not ascertained. 



Specimens examined — Texas: San DiegO; Nealley, 65,1892; Point Ysa- 

 bel, Cameron County, Nealley, 829; Laredo, Mackenzie, 103, 1900; San An- 

 tonio, Bush, 810, 811, 1901. — Mexico: Monterey, Pring^Ze, 1970, 1888; 

 Monclova, Palmer, 1371, 1880. — New Mexico: No locality given, Wright, 

 776, 777 and 2055. 



10. Triodia eragrostoides V. & S. Contr. U. S. Nat. 



Herb. 1: 58. 1890. 



Sieglingia eragrostoides (Y. & S.) Dewey, Contr. U. S. Nat. Herb. 2 : 



539. 1894. 

 Tricuspis eragrostoides (V. & S.) Heller, Cat. PI. N. A. 29. 1900. 



Culms 6-9 dm. tall, leafy ; sheaths longer than the inter- 

 nodes, roughish ; ligule short, ciliate toothed ; leaves 2-3 

 dm. long, flat, scabrous, acuminate; panicle large and spread- 

 ing, 3 dm. long, the branches slender, rather distant, single 

 or in twos, the lower ones 12.5-15 cm. long, lax-flowered; 

 spikelets 5-9-flowered, 5 mm. long, short-pediceled, alternate, 

 and mostly single; lower scales nearly equal, lanceolate- 

 acuminate, 1-nerved; flowering scales 2-2.5 mm. long, 3- 

 nerved, oblongs obtuse, emarginate, short-cuspidate, the lateral 

 nerves and midrib pubescent below ; palet one-fourth shorter 

 than the flowering scale, obtuse and denticulate. Sandy soil; 

 common. August to October. Perennial. 



Louisianian area. Florida and Texas to New Mexico and 

 Mexico. 



Type locality : " Florida, Blodgett, Texas, Buckley, Nealley, 

 Reverchon.'^ 



Specimens examined.— Mexico : Monterey, Pringle, 1972, 1888.— Texas : 

 No locality given, Nealley, 822, Beverchon.— New Mexico : No locality given, 

 Wright, 426, 478 and 2054. 



11. Triodia eragrostoides scabra (Vasey) B. F. Bush. 



Sieglingia eragrostoides scabra Vasey, Beal, Gr. N. A. 2 : 65. 1896. 

 Plant scabrous throughout; lower blades broader. 

 Louisianian area. Texas. 

 Type locality : " San Diego, Duval County, Texas." 



