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 Frem. Rep. Exped. Rocky Mount. 318. 1845. 

 Obione spinosa Moq. in DC. Prodr. 13 2 : 108. 1849. 



Atriplex spinosa D. Dietr. Syn. PI. 5: 536. 1S52. 



Type locality: Borders of the Great Salt Lake, Utah. 



Range: 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 steins are dull whitish-scurfy. The leaf 

 blades are broadly ovate to almost rotund and are thickly crowded on the branch) 



14. Atriplex collina Woot. & Standi. Contr. U. S. Nat. Herb. 16: 119. 1913. 

 Type locality: Dry hills near the north end of the Carrizo Mountains, northea I 



corner of Arizona. Type collected by Standley (no. 7481). 



Range: 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 locality: Winslow, Arizona. 



Range: Southwestern Colorado to northern New Mexico and Arizona. 



New Mexico: Farmingtou; Tiznitziu; Gallup; near Horace; Carrizo Mountain ; 

 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. 'II" 

 leaves are broadly obovate or oval, entire, short-petioled, 3 to 5 cm. 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 S. Wats. Proc. Amer. Acad. 9: 118. 1874. 

 Type locality: ( lerros BraA^os, Mexico. 



Ranch: Western Texas and southern New Mexico arid southward. 

 New Mexico: Burro Mountains (Mexican Boundary Survey L215a). 



17. Artiplex cuneata A. Nels. Bot. Gaz. 34: 357. 1902. 

 Type locality: Emery, Utah. 



Range: Utah and Colorado to northern Arizona and northwestern New Mexico. 

 New Mexico: Sbiprock; Farmington. Dry hills, in the Upper Sonoran Zone. 

 A low slirnl) about 50 cm. high. 



7. CORISPERMUM L. Bug » l D. 



Widely spreading tumbleweeds with linear spinescenl tipped leaves, inconspicu- 

 ous axillary Mowers, ami peculiar lenticular "buglike" fruit. 



ki:v to tiik siii n - 



Spikes slender and lax; Lower bracts narrower than the frail L. C. nitidutn. 



Spikes stout, thick, dense; all the bracts much wider than the fruit. 2. C. marginaU. 



1. Corispermum nitidum Kit.; Schult. Oesterr. II. ed. 2. 1: 7. L814. 

 Coris/H mum hy88opifolium microcarpum s. Wats. Proc. Amer. Acad. 0: 123. iv i. 



Tvi-i: i OOA1 in : limitary. 



Hanoi : Illinois to North Dakota, Now Mexico, and T< 



X i w M Willard; Meailla Valle; i Mountains, Dry 



Gelds, in i he Lower ami Upper Sonoran zones. 



