740 CONTRIBUTIONS FROM THE NATIONAL HERBARIUM. 



New Mexico: Tunitcha Mountains; Farmington ; Chiipadero; Gallup; Atarque 

 de Garcia; Moreno Valley; San Augustine Plains. Dry hills and plains, in the Upper 

 Sonoran Zone. 



A low, densely branched shrub, 50 cm. high or less, rarely larger. The small yellow 

 heads are very numerous, making it a handsome plant when in full flower. 



2. Tetradymia filifoHa Greene, Bull. Torrey Club 25: 123. 1898. 



Type locality: Round Mountain, White Mountain Range, New Mexico. Type 

 collected by Wooton (no. 183). 



Range: Known only from type locality, in the Upper Sonoran Zone. 



124. BEBBIA Greene. 



Much branched plant about 1 meter high , shrubby at the base, with slender rushlike 

 erect branches and few alternate linear leavesf heads pedunculate, 20 to 30-flowered ; 

 involucre campanulate, the bracts imbricated in 2 or 3 series, oblong, appressed; 

 achenes turbinate, hirsute, faintly 5-nerved; pappus of 15 to 20 plumose bristles in a 

 single series. 



1. Bebbia juncea (Benth.) Greene, Bull. Calif. Acad. 1: 179. 1885. 



Carphephorus junceus Benth. Bot. Voy. Sulph. 21. 1844. 



Type locality: Magdalena Bay, Lower California. 



Range: Southern New Mexico to California and Mexico. 



New Mexico: Parkers Well (Wooion). Sandy plains, in the Lower Sonoran 

 Zone. 



125. ARNICA L. 



Erect simple-stemmed perennials with opposite leaves and long-pedunculate heads 

 of yellow flowers; rays yellow, showy; involucre campanulate, the narrow bracts in 

 1 or 2 series, nearly equal; receptacle flat; achenes linear, pubescent; pappus a single 

 series of slender barbellate bristles. 



key to the species. 



Leaves cordate-ovate, the cauline ones petiolate 1. A. c.ordifolia. 



Leaves lanceolate, oblanceolate, or lance-oblong, the cauline ones 



sessile 2. A./oliosa. 



1. Arnica cordifolia Hook. Fl. Bor. Amer. 1: 331. 1834. 



Type locality: "Alpine woods of the Rocky Mountains on the east side." 

 Range: British America to California, Nevada, and northern New Mexico. 

 New Mexico: Chama; Winsor Creek. Shaded hillsides, in the Canadian Zone. 



2. Arnica foliosa Nutt. Trans. Amer. Phil. Soc. n. ser. 7: 407. 1841. 



Type locality: "On the alluvial flats of the Colorado of the West, particularly 

 near Bear River of the lake Timpanagos." 



Range: Montana to northern New Mexico. 



New Mexico: Tunitcha Mountains; Chama. Wet ground, especially meadows 

 about lakes and streams, in the Transition Zone. 



Tliis is very common in the Tunitcha Mountains, where it covers large areas of 

 wet meadow to the exclusion of almost every tiling else. About Chama only two 

 or three plants were seen. 



126. SENECIO L. 



Tall or low, annual or perennial herbs with alternate, sessile or petiolate, entire 

 to i)innatifid or subpinnate leaves and solitary, racemose, or corymbose heads of 

 yellow flowers; heads radiate or discoid, many-flowered; involucre cylindric to cam- 

 panulate, of few or many erect connivent bracts, sometimes with a few smaller ones 

 at the base; receptacle flat, naked; pappus of numerous soft capillary bristles. 



