CATALOGUE OF PLANTS COLLECTED IN SALTON SINK. 



107 



SALICACEjE. 

 Salix nigra Marsh. 



River banks, springs, and damp soil throughout the 

 Sink. Mecca, Dos Palmas, New River near Rock- 

 wood, Holtville (8079), Rabbit Bay (MacDougal 

 213). 



Possibly the variety vallicola Dudley (S. vallicola 

 Britton), but our material is insufficient for certain 

 determination. S. gooddingii Ball is apparently the 

 same as Dudley's variety, but I have seen no authen- 

 tic specimens. While the reference of these desert 

 trees to the species S. nigra is not satisfactory it 

 may suffice for the present. 



Salix exigua Nutt. S. longifolia Muhl. in part. (?) 



Abundant in river bottoms and along irrigation canals 

 in Imperial Valley. New River near Rockwood 

 (8383) and Calexico, Alamo River at Holtville 

 and east of Calexico, irrigation canals at Meloland 

 (8092) and Brawley. 

 Throughout the southern California deserts, and 

 reaching the cismontane borders. 



Populus macdougalii Rose. 



In the bottom lands of the Alamo and New Rivers, 

 as an entrant from the delta. Also, frequent in 

 cultivation in all parts of the Sink. Mecca (8130, 

 8385, 8471, 8607, and MacDougal 128), Indio (8470). 



According to Indian testimony the delta cottonwood 

 was unknown in the upper end of the Sink before 

 the construction of the Southern Pacific Railroad, 

 when trees were brought from Yuma and planted at 

 several of the stations. From these trees were de- 

 rived those now growing about the Indian settle- 

 ments. The only self-planted cottonwooda in this 

 part of the Sink are the young trees which are spring- 

 ing up in abundance on the moist borders of Salton 

 Sea and along irrigation ditches from wind-sown 

 seeds of the cultivated trees. The delta cottonwood 

 occurs along the Colorado River in the neighborhood 

 of Yuma and is especially abundant bordering the 

 diffluents of the delta. It differs from P.fremontii, 

 which is frequent in central and southern California, 

 in its smaller size, the lighter color of the mature 

 trunks, the whitish gray of the bark of the limbs, 

 and its smaller leaves, which are truncate, instead 

 of cordate, at base, and are twice as broad (10 to 12 

 cm.) as high, and short-pointed at the apex. 



LORANTHACE.E. 



Phoradendron califomicum Nutt. 



Common on Prosopis glandulosa, P. pubescens, and 

 somewhat less so on Olneya tesota, Cercidium tor- 

 reyanum, and Parosela spinosa, throughout the 

 ranges of these trees in the Sink. 

 Colorado Desert and east into Arizona. 



POLYGONACEJE. 



Rumex berlandieri Meisner. 



Along rivers and in moist soil in Imperial Valley. 



Holtville (8078), Meloland, El Centro. Also on 



Obsidian Island (MacDougal 30, 109a) and Imperial 



Junction Beach (MacDougal 32). 

 Eastward through Arizona and New Mexico to Mexico. 



An entrant from the delta. Not previously reported 



from California. 



Rumex crispus Linn. 



Along the stream from the railway waterworks, 



Mecca (8617). 

 This European dock is abundantly naturalized in 

 California, but only adventive in the Sink. 



Polygonum lapathipolium Linn. 



In a few places along an irrigation canal, half way 

 between Calexico and Signal Mountain (8078). 

 Similarly at Meloland. 



POLYGONACEJE— Continued. 



Polygonum lapathipolium Linn. — Continued. 



Frequent in cultivated grounds in central and southern 

 California. 



Eriogonum trichopes Torr. 



In dry detrital soil near Mecca (8291). 



A common species of the Calif ornian deserts. 



Eriogonum thomasii Torr. 



Obsidian Island (MacDougal 27, 114). 

 A common species of the Colorado Desert. 



Eriogonum plumatella Dur. & Hilg. 



Caleb (8290), Durmid (8060), Obsidian Island (Mac- 

 Dougal 205). 

 A widely distributed species of the Californian deserts. 



Eriogonum deserticola Wats. 



Big Island (MacDougal 416). 



An endemic species of the Colorado Desert. 



Chorizanthe rigida T. & G. 



In dry detrital soil at Durmid (8061). 

 Common in similar places throughout the Colorado 

 desert. 



CHENOPODIACE.E. 



Chenopodium mueale Linn. 



An occasional weed about houses. Mecca, Brawley. 

 Common in many parts of California. 



Chenopodium album Linn. 



A few plants in fields at Mecca. 

 This widely distributed weed is abundant in California, 

 but was not seen elsewhere in the Sink. 



Atriplex semibaccata R. Br. 



Abundant along the railway near Imperial (8252), and 



in the streets at Brawley. 

 Introduced into cultivation in southern California as 

 a forage plant, but not proving of value; now a 

 common weed in many places, and especially 

 abundant about San Diego. 



Atriplex fasciculata Wats. 



Streets of El Centro (8090), Imperial Junction Beach, 



and Obsidian Island (MacDougal). 

 The type was collected near Daggett in the Mojave 

 Desert. 



Atriplex lentiformis Wats. 



In wet saline soil throughout the Sink. Indio, Ther- 

 mal (8266), alkaline flats, Mecca (8116, 8264, and 

 MacDougal), Dos Palmas (8265), Caleb along 

 ditches, Imperial, bottom lands of New River at 

 Brawley and Calexico, mouth of Salton Slough, 

 Travertine Wash (MacDougal 9), Obsidian Island 

 MacDougal 411), Imperial Junction Beach (Mac- 

 Dougal 106). 

 A species of the California deserts extending into 

 Arizona; also collected in lower San Joaquin Valley. 



Atriplex polycarpa Wats. 



Common in damp alkaline soil throughout the Sink. 

 Indio, Thermal, alkaline flats, Mecca (8262), 

 beach at Mecca (MacDougal 405), Travertine 

 Terraces (MacDougal 821, 222a), Obsidian Island 

 (MacDougal 45), Imperial Junction, El Centro, 

 banks of New River at Calexico (8261). 

 A species of the Californian deserts and adjacent 

 Arizona. 



Atriplex linearis Wats. 



In dry detrital soil, Durmid (8073), Imperial Junc- 

 tion beach (MacDougal 108), in alluvial soil, Holt- 

 ville (8258), between Brawley and Salton Sea (8253). 



A Sonoran species, reaching Arizona, and now first 

 reported from California. 



