270 MISC. PUBLICATION 42 3, U. S. DEPT. OF AGRICULTURE 



1. Atriplex patula L., Sp. PL 1053. 1753. 



Winslow, Navajo County {Griffiths 5034), Moenkopi, Coconino 

 County (Clvte 63), 4,500 to 5,000 feet, reported to be common in 

 Moenkopi Wash. 



Represented in Arizona by var. hastata (L.) Gray, which is widely 

 distributed in Canada and the United States. 



2. Atriplex rosea L., Sp. PL ed. 2, 1493. 1763. 



Apache County to Coconino County, south to Maricopa County, 

 1,000 to 7,000 feet. Extensively naturalized in the western United 

 States, from Europe. 



Redscale, red orache. A common weed in waste places in parts of 

 northern Arizona. 



3. Atriplex semibaccata R. Br., Prodr. Fl. Nov. Holl. 406. 1810. 

 Near Safford (Graham County), Salt River Valley (Maricopa 



County), 1,000 to 3,000 feet. New Mexico, Arizona, and California; 

 naturalized from Australia. 



Australian saltbush. Introduced into the United States about 45 

 years ago, now a common weed in southern Arizona. The low plants 

 help bind the soil along irrigation ditches, crowd out undesirable 

 weeds, and furnish forage for domestic animals, particularly sheep. 



4. Atriplex saccaria S. Wats., Amer. Acad. Arts and Sci. Proc. 9: 112. 



1874. 

 Apache County to Coconino County, 4,500 to 6,000 feet. Wyoming 

 and Utah to New Mexico and Arizona. 

 Plants apparently sometimes dioecious. 



5. Atriplex argentea Nutt,, Gen. PL 1: 198. 1818. 



Apache, Navajo, and (probably) Coconino Counties, about 5,000 

 feet. North Dakota to New Mexico, northern Arizona, and Cali- 

 fornia. 



This plant is a tumbleweed. The species is represented in Arizona 

 by A. caput-medusae Eastw., a form in which the faces of the fruiting 

 bracts are covered with long, often twisted, hornlike processes, but it is 

 stated (see footnote 40, p. 267, Hall and Clements, p. 285) that this 

 form intergrades completely with typical A. argentea. 



6. Atriplex powellii S. Wats., Amer. Acad. Arts and Sci. Proc. 



9: 114. 1874. 



Apache County to eastern Coconino County, 5,000 to 6,000 feet. 

 South Dakota and Montana to New Mexico and Arizona. 



Griffiths reported that this species covers extensive areas of denuded 

 land in the Little Colorado River region. The plants apparently are 

 sometimes dioecious. 



7. Atriplex elegans (Moq.) D. Dietr., Syn. PL 5: 537. 1852. 



Obione elegans Moq. in DC, Prodr. 13 2 : 113. 1849. 



Greenlee, Maricopa, Pinal, Cochise, Santa Cruz, Pima, and Yuma 

 Counties, 3,600 feet or lower. Western Texas to southern California 

 and northern Mexico. 



A plant of weedlike habit, very common at roadsides and in waste 

 land in southern Arizona, and freely grazed by cattle. The Pima 

 Indians boiled it with other food, sometimes with the flower buds of 



