WOOTON AND STANDLEY—FLORA OF NEW MEXICO, 205 
Range: Arizona to western Texas, southward into Mexico. 
New Mexico: Providencia Lake (Wooton). Dry plains, in the Lower Sonoran Zone. 
A low shrub, 30 to 70 cm. high, with a peculiar burlike fruit and white-scurfy leaves 
and stems. It occurs in the alkaline flats of the extreme southern part of the State. 
13. Atriplex confertifolia (Torr.) S. Wats. Proc. Amer. Acad. 9: 119. 1874. 
Obione confertifolia Torr. in Frém. Rep. Exped. Rocky Mount. 318. 1845. 
Obione spinosa Moq. in DC, Prodr. 187: 108. 1849. 
Atriplex spinosa D. Dietr. Syn. Pl. 5: 536. 1852. 
Tyre Locauity: Borders of the Great Salt Lake, Utah. 
Rance: Idaho and Wyoming to northern Mexico. 
New Mexico: Western McKinley and San Juan counties. Dry plains and lower 
hills, in the Upper Sonoran Zone. 
A low shrub, seldom more than 50 cm, high, forming dense clumps. Many of the 
branches end in spinose points. The leaves and stems aredull whitish-scurfy. The leaf 
blades are broadly ovate to almost rotund and are thickly crowded on the branches. 
14, Atriplex collina Woot. & Standl. Contr. U. 8. Nat. Herb. 16: 119, 1913. 
Type tocauiry: Dry hills near the north end of the Carrizo Mountains, northeast 
corner of Arizona. Type collected by Standley (no. 7481). 
Rance: Northwestern New Mexico, northeastern Arizona, and western Colorado, 
New Mexico: Carrizo Mountains. Dry plains, in the Upper Sonoran Zone. 
15. Atriplex sabulosa Jones, Contr. West. Bot. 11: 21. 1903. 
TypE Locauiry: Winslow, Arizona. 
RANGE: Southwestern Colorado to northern New Mexico and Arizona. 
New Mexico: Farmington; Tiznitzin; Gallup; near Horace; Carrizo Mountains; 
east of Deming. Dry plains and low hills, in the Upper Sonoran Zone. 
A low suffrutescent plant with generally numerous stems 30 to 50 cm. high. The 
leaves are broadly obovate or oval, entire, short-petioled, 3 to 5 em. long or less, and 
are, like the stems, thickly whitish-scurfy. The plant is browsed more or less by 
cattle, sheep, and goats. It is very common in alkaline spots in the northwestern 
part of the State. 
16. Atriplex greggii 8. Wats. Proc. Amer. Acad, 9: 118, 1874. 
TYPE LOCALITY: Cerros Bravos, Mexico. 
Rance: Western Texas and southern New Mexico and southward. 
New Mexico: Burro Mountains ( Mexican Boundary Survey 1215a). 
17. Artiplex cuneata A. Nels. Bot. Gaz. 34: 357. 1902. 
Type LocaLiry: Emery, Utah. 
Ranae: Utah and Colorado to northern Arizona and northwestern New Mexico. 
New Mexico: Shiprock; Farmington. Dry hills, in the Upper Sonoran Zone. 
A low shrub about 50 em. high. ° 
7. CORISPERMUM L. BuGseEep. 
Widely spreading tumbleweeds with linear spinescent-tipped leaves, inconspicu- 
ous axillary flowers, and peculiar lenticular ‘‘buglike” fruit. 
KEY TO THE SPECIES. 
Spikes slender and lax; lower bracts narrower than the fruit. ...... 1. C. nitidum. 
Spikes stout, thick, dense; all the bracts much wider than the fruit. 2. C. marginale. 
1. Corispermum nitidum Kit.; Schult. Oesterr. Fl. ed. 2. 1: 7. 1814. 
Corispermum hyssopifolium microcarpum 8. Wats. Proc. Amer, Acad. 9: 123. 1874. 
Type LocaLiry: Hungary. 
RanGE: Illinois to North Dakota, New Mexico, and Texas. 
New Mexico: Farmington; Willard; Mesilla Valley; Carrizo Mountains. Dry 
fields, in the Lower and Upper Sonoran zones. 
