(450 ) 
Distribution: Southern Arizona and southern California on 
the Colorado Desert and in the vicinity of San Diego. Lower 
Sonoran. 
Specimens examined: San Diego, Jones, April 5, 1882; Abrams 
3464; Tia Juana, Abrams 3491; Morongo Pass, S. B. & W. F. 
Parish 11-a; Palm Springs, Parish 4132; Mohave River, Palmer, 
May, 1876; Elsinore, Baker, 4145; Vallecitos, Brandegee, April 10, 
1896. 
s. Lycrum Parison A. Gray, Proc. Am. Acad. 20: 305. 1884. 
Type locality: ‘““Mesas in San Bernardino Valley, S. California.” 
Distribution: This was described from a single bush which ac- 
cording to Mr. Parish has since been destroyed. The species 
has never been rediscovered. Lower Sonoran. 
Specimens examined: Mesa south of San Bernardino, Parish, 
May, 1885. 
6. Lycrum Coorrerrt A. Gray, Proc. Am. Acad. 7: 388. 1867, 
Lycium Cooperi pubiflora A. Gray, Syn. Fl. 2, pt. 1: 238. 1878. 
Type locality: ‘East slope of Providence Mountain, in the 
Mohave District, California.” 
Distribution: Mohave and Colorado Deserts, eastward to Ari- 
zona. Lower Sonoran. 
Specimens examined: Between Calexico and Signal Mountain, 
on the International Boundary, Abrams 3149; Palmdale, Elmer 
3661; Victor, Palmer 22344; Mohave Desert, Pringle, May 18, 
1882. 
3. NICOTIANA. ‘'Tosacco. 
1. Nicotiana cLtauca R. Grah. Edinb. N. Phil. Journ. 175. 
1828. 
Type locality: “It was raised in 1827 from seeds communi- 
cated, without specific name, to the Royal Botanical Garden, 
Edinburgh, by Mr. Smith at Monkwood, whose son sent them from 
Buenos Ayres.” 
Distribution: The tree-tobacco, which is naturalized from South 
America, is frequent in waste places and along dry washes of 
streams, often found extending well up into the canyons. Upper 
and Lower Sonoran. 
