108 



THE SALTON SEA. 



CHENOPODIACEA— Continued. 



Atriplex hymenelytra Wata. Desert Holly. 



In dry dctrilal soil in the northeastern part of the 

 Sink, where it is abundant, and opcasionally else- 

 where. Mecca, Caleb, Salton, Durniid, Bertram, 

 Obsidian Island (MaoDougal 33, 48, 414). 



A species of the Californian deserts extending into 

 Arizona. 



Atriplex canescens James. 



One of the most abundant and widespread plants of 

 the Sink, in both motierately damp and arid soils. 

 The wings of the fruit vary greatly in size and in 

 the development of the teeth. 



Wingx dccphi toothed: Bluffs of New River at Calexico 

 (8074), Holtvillc (8077), between Brawloy and 

 Salton Sea (8254), Caleb (825.5, 8256), El Centro, 

 Durniid, Obsidian Island (MacDougal 41, 47, 118), 

 Imperial Junction Beach (MacDougal 52). 



Wings entire, or nearly »o: Holtville (8257), Imperial 

 (8259), Rockwood. 



A species of extended range in the arid west, through- 

 out the deserts, and occasionally in other parts of 

 southern California. 



Atriplex saltonensis Parish. 



Mesa at Mecca (8452, 8600). 

 Known only from the type station. 



Spirostachys occiden talis Wats. AUenrolfia occidenlalis 

 Kuntze. 



In alkaline soil throughout the Sink. Alkaline flats at 

 Indio, Thermal and Mecca (8099), mouth of Salton 

 Slough (8071), Caleb, Mortmcrc, Figtree John, 

 Travertine Terraces m fruit (8437), Rockwood, 

 borders of Salton Sea near Westmoreland, New 

 River at Calexico. 



A sjjccics widely distributed in the western deserts. 



Suteda torreyana Wats. Dondia moquinii A. Nelson. 



In alkaline soil throughout the Sink. Alkaline flats 

 at Indio and Thermal, Mecca (MacDougal), Rock- 

 wood, Imperial, El Centro. 



A species widely distributed in the western deserts 

 and frequent in cismontane southern California. 



AMARANTHACE.E. 



Amaranthus palmeri Wats. 



River bottoms in Imperial Valley and now an abundant 

 weed in irrigated lands. Holtville (8269), Imperial, 

 Brawley, New River at Rockwood and Calexico, 

 East Bay of Obsidian Island (MacDougal 412). 



A species of the southern (Colorado Desert extending 

 into Arizona. Here an entrant from the delta. 



A. chloroslachys Willd. is reported in Davy's list. 

 There is no specimen from the Basin in the herba- 

 rium of the University of California, and Davy's 

 record was doubtless founded on an erroneous de- 

 termination of a specimen of A. palmeri. 



Amabantbits GRiGcizANB Linn. 



A single specimen in a field at Mecca (8609). 

 A common weed throughout California, but not seen 

 elsewhere in the Sink. 



Amarantbus cAUFOBNicus Wats. 



Common in Imperial Valley in cultivated and waste 

 grounds. 



Throughout California northward to Oregon; abun- 

 dant in bottom lands of the Colorado River at Fort 

 Yuma, whence probably introduced into Imperial 

 Valley through irrigation canals. 



Cladothrix oblongifolia Wats. 



Frequent in dry detrital soil at the northeastern end 

 of the Sink, and occasional elsewhere. Durmid 

 (8067), Caleb (8298). 



Mountains and mesas of the eastern part of the Colo- 

 rado Desert and adjacent Arizona. 



NYCTAGINACE.«. 



Abronia villosa Wats. var. aurita (Abrams) Jepson. 



In Ught soil throughout the Sink. Dixieland, West- 

 moreland, Calexico (8294), Mecca (8474), sands near 

 Travertine Rock. 



Frequent in the Colorado Desert. 



AIZOACE.ffi;. 



Sesuvium sessile Pers. 



Frequent in wet alkaline soil throughout the Sink. 

 Mecca, mouth of Salton Slough, borders of 

 Salton Sea northwest of Brawley, New River 

 bottoms near Rockwood and Calexico, Imperial 

 Junction (MacDougal 110), Carrizo Sands (Mac- 

 Dougal). 



In California this species has been collected in San 

 Joaquin Valley and in both the Mojave and the 

 Colorado deserts. 



CARYOPHYLLACE.ffi. 



Agkostema githago Linn. 



A single plant noted along the railway in Imperial 



Valley. 

 As yet known in California only as an occasional waif. 



PORTULACACE.S. 



PoBTULACA OLEHACEA Linn. 



A very rare weed about houses. Moccaj Brawley. 

 This cosmopolitan weed is abundant m the older- 

 settled parts of California. 



Calandrinia ambigua Howell. Claylonia ambigua Wats. 

 Indio (March 1881, April 1884, Parish). 

 An endemic species of the Colorado Desert, seldom 

 collected. 



CRUCIFER«. 



Lepidium lasiocarpum Nutt. 



In alluvial soil, coming up freely in places where water 

 has dried off. Abundant on mesa land which had 

 been flooded by leakage from a canal, Rockwood 

 (8296), Imperial Junction Beach (MacDougal 51), 

 in a small basin in the mounds east of Holtville, 

 near Westmoreland. Alamo River, according to 

 Davy's list. 



A species of the western deserts. 



Dithyraea califomica Ilarv. 



Plains near Mecca (8451, 8457, 8478), sands near 



Travertine Terraces. 

 Common northwest to San Gorgonio Pass. 



Streptanthus longirostris Wats. Guillenia longirostris 

 Greene. 

 Mesa northeast of Mecca (8444, 8473). 

 A common species of the Colorado Desert. 



Bbassica nigka Koch. 



Sparingly along a roadside near Imperial. 



A common weed in the cultivated parts of California. 



CAPPARADACE.S;. 



Wislizenia refracta Engelm. 



Borders of Salton Sea (MacDougal). 

 From Texas to the desert borders of CaUfornia, and 

 in the San Joaquin Valley. 



RESEDACE.S. 



Oligomeris glaucescens Camb. 



Borders of Salton Sea (MacDougal 1 12, 1 14), Obsidian 

 Island (MacDougal 41), dry desert between Braw- 

 ley and Salton Sea, near Mecca (8443). 



In California in the deserts along the southern borders 

 of the State, and occasionally on the lower coast, 

 without doubt indigenous. 



