722 CONTEIBUTIONS FEOM THE NATIONAL HEEBAEIUM. 



8. Hymenopappus arenosus Heller, Bull. Torrey Club 25: 200. 1898. 



Type locality: Near Espanola, Santa Fe County, New Mexico. Type collected 

 by Heller (no. 3542). 



Range: Colorado and Utah to New Mexico. 



New Mexico: Carrizo Mountains; Tunitcha Mountains; Farmington; Dulce; Santa 

 Fe; Espanola; Ojo Caliente; Chama River; Albuquerque; White Sands. Dry plains 

 and low hills, in the Lower and Upper Sonoran zones. 



9. Hymenopappus filifolius Hook. Fl. Bor. Amer. 1: 317. 1833. 



Type locality: "On the undulating arid grounds of the Columbia, near Walla 

 Walla, and on the banks of the Spokane and Flat-head Rivers." 



Range: British America to Nebraska, New Mexico, and Oregon. 



New Mexico: Glorieta; Santa Fe; Round Mountain. Plains and dry hills, in the 

 Upper Sonoran Zone. 



100. OTHAKE Raf. 



Scabrous, more or less viscid herbs with lanceolate to linear, entire, petiolate, alter- 

 nate leaves and loosely cymose pedunculate heads of rose purple flowers; involucre 

 turbinate, of linear- lanceolate bracts with scarious tips, these in 2 series; rays pal- 

 mately 3-cleft, fertile; stamens exserted; achenes linear to clavate, quadrangular, 

 minutely ■pubescent; pappus of 6 to 12 hyaline scales. 



key to the species. 



Heads homogamous; achenes broadened upward 1. 0. texanum. 



Heads heterogamous; achenes not broadened upward 2. 0. sphacelatum. 



1. Othake texanum (DC.) Bush, Trans. Acad. St. Louis 14: 176. 1904. 

 Palafoxia tcxana DC. Prodr. 6: 125. 1836. 



Polypteris texana A. Gray, Proc. Amer. Acad. 19: 30. 1883. 

 Type locality: Texas. 



Range: Western Texas and eastern New Mexico. 



We have seen no New Mexican specimens of this, but it is said by Doctor Gray 

 to have been collected at Los Moros by Bigelow in 1853. 



2. Othake sphacelatum (Nutt.) Rydb. Bull. Torrey Club 37: 331. 1910. 

 Stevia sphacelata Nutt.; Torr. Ann. Lye. N. Y. 2: 214. 1828. 

 Polypteris hookeriana A. Gray, Proc. Amer. Acad. 19: 30. 1883. 



Type locality': Not stated. 



Range: Nebraska and Colorado to New Mexico and Texas. 



New Mexico: Albuquerque; Jemez; Mesilla Valley; Tortugas Mountain; south of 

 Melrose; Carlsbad; Roswell; Nara Visa. Plains and mesas, in the Lower and Upper 

 Sonoran zones. 



101. HYMENOTHRIX A. Gray. 



Slender, nearly glabrous annuals, having once to tlirice parted leaves with linear 

 or fdiform divisions, and numerous small corymbose heads with yellowish, whitish, 

 or purplish flowers; involucre turbinate-campanulate, about 30-flowered, the bracts 

 7 to 10, obovate to oblong, with scarious tips; ray flowers 6 to 10; achenes 4 or 5- 

 angled, obpyramidal; pappus about as long as the achene, of 12 to 20 lanceolate hya- 

 line scales. 



KEY TO THE SPECIES. 



Bracts of the involucre glabrous, purplish; disk corollas white or 



purplish 1. H. wrightii. 



Bracts pubescent, yellowish ; disk corollas yellow 2. H. wislizeni. 



