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180 BOTANY OF THE DEATH VALLEY EXPEDITION. 



Chenopodium murale L. Sp. PL i. 219 (1753). Typo locality European. 



This plant was recorded in the desert from Furnace Creek Ranch (Nos. 243, 573) ; 

 from Resting Springs Mine, from the vicinity of Keeler, and from Havilah. At all 

 these points it grow as a weed near places of human habitation and in soil moistcr 

 than that of the open desert. It is one of the very few introduced weeds*that have 

 penetrated the American desert. 



Atriplex argentea Nutt. Gen. i. 198 (1818). Type locality, "on sterile and saline 

 places near the Missouri." 



Oil the shore of Owens Lake (No. 873), about Tehachapi Lake (No. 1129), and near 

 Tulare (No. 1251). Our specimens are below the southern limit of the species, as 

 defined by Watson, 1 yet they do not, apparently, belong to his A. cxpansa. 



Atriplex canescens (Pursh) FL ii. 370 (1814), under Callifjonmn ; James, Cat. 

 178 (1825). Type locality, "in the plains of the Missouri near the Big-bend." 

 Nuttall states 2 that Pnrsh's specimens "must have been in the collection of Lewis 

 and Clark, as I did not meet with it on the borders of the Missouri." 



This species occurs, often only sparingly in certain localities, throughout the Upper 

 and Lower Souoran zones in the wholo desert region traversed by the expedition. 

 In the southern portion of the Mohave Desert region it rarely forms an important 

 part of the desert vegetation. Specimens were collected on the south slope of Browns 

 Peak (No. 180) and in Surprise Canon, Panamint Mountains (No. 724). 



Atriplex confertifolia (Torr. & Frem.) in Frem. Second Rep. 318 (1845), under 

 Obione; Wats. Proc. Amer. Acad. ix. 119 (1874). Type locality, " on the borders 

 of the Grwat Salt lake." 



This species is also an abundant one En nearly all the valleys of the desert region. 

 It was collected betw r een Stoddard Wells and Daggett, California (No. 134), and at 

 Pigeon Spring, Esmeralda County, Nevada (No. 2012). 



Atriplex fasciculata Wats. Proc. Amer. Acad. xvii. 377 (1882). Type locality, 

 "near Fish Ponds, Mohave Desert," California. 



Between Darwin and Keeler (No. 903). This species has not before been reported 

 since its discovery. 



Atriplex hastata L. Sp. PL ii. 1053 (1753). Type locality European. 



About Tehachapi Lake (No. 1128). The specimens collected were very young, but 

 they undoubtedly belong to this species. The leaves are opposite, ovate-deltoid to 

 ovate-hastate, and usually dentate. 



Atriplex hymenelytra (Torr.) Pac. R. Rep. iv. 129(1857), under Obione; Wats. 

 Proc. Amer. Acad. ix. 119 (1874). Type locality, "bills and gravelly places, on 

 Williams' River," Arizona. 



This greasowood was recorded between Stoddard Wells and Daggett (No. 137) ; at 

 several points between Daggett and Lone Willow Spring; in Wiudy Gap; in Long 

 Valley; at many points in the bottom of Death Valley (No. 195), from Furnace 

 Creek to Saratoga Springs; in Resting Springs Valley; at several points in the 

 Funeral Mountains; in Pahrump Valley ; in Vegas Wash; between Towner's and 

 Ash Meadows; near Keeler; and between the latter point and Darwin. The species 

 is characteristic of the Lower Sonoran zone, growing upon soil that is in part alka- 

 line, but not sufficiently so to effervesce, and in part gravelly, conditions that are 

 often found in desert washes. Dr. Merriam has reported it in tlie valleys of the 

 Virgin and Muddy rivers, Nevada. 



^roe. Amer. Acad. ix. 115 (1874). 

 •PL Gamb. 184 (1848). 



