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1..Satrx vatticora (Dudley) Britton, N. Am. Trees 184. 1908. 
Salix nigra vallicola Dudley in Abrams, Fl. Los Angeles 100. 1904. 
Type locality: “Along the Santa Ana River near Orange,” 
California. 
Distribution: Streambanks in the Sacramento and San Joaquin 
valleys, southward into southern California. This variety differs 
from the true Salix nigra in its glandular stipules, and obovate 
or rounded instead of ovate bracts of the staminate aments. Speci- 
mens from the Colorado Desert (Abrams 3195) have the bracts 
of the staminate aments glandular-toothed. ‘There are other 
evidences that this desert plant is distinct from the coast species, 
but more material is needed to satisfactorily determine its relation- 
ship. Upper and Lower Sonoran. 
Specimens examined: Gorman’s Station, Antelope Valley, 
Abrams &§ McGregor 314; Santa Ana River, near Orange, Abrams 
32506; near Santa Ana, Helen D. Geis; Elsinore, Baker 4146; 
San Dieguito River, Abrams 3371; San Diego River, San Diego, 
Abrams 3410; Tia Juana, Abrams 3484; Blue Lake, Imperial 
County, Abrams 3195. 
2. SALIX LASIANDRA Benth. Pl. Hartw. 335. 1857. 
Type locality: ““Ad flumen Sacramento.” 
Distribution: Southwestern British Columbia and western 
Washington and Oregon, southward to southern California. Upper 
Sonoran and Transition. 
Specimens examined: Los Angeles River, near Tropico, Abrams 
1449; Pasadena, Grant 1160; vicinity of San Bernardino, Parish 
4635, 4677; Bear Valley, San Bernardino Mountains, Abrams & 
McGregor 730. 
3. SALIX LAEVIGATA Bebb. Am. Nat. 8: 202. 1874. 
Type locality: “California, at Santa Cruz, also ‘Ukiah’ and 
Alameda Co.” 
Distribution: Siskiyou County south to the northern part of 
Lower California. In southern California this species is frequent 
along the principal streams. Upper Sonoran and Transition. 
Specimens examined: Sulphur Mountain Spring, near Santa 
Paula, Abrams tf McGregor 60; Topatopa Mountains, Abrams 
McGregor 121; Los Angeles River, near Rivera, Abrams 3253; 
Ballona Creek, near Mesmer, Abrams 1467; near Chatsworth, 
