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Distribution: Deserts of southern California eastward to western 
Texas, and southward into Lower California and northern Mexico. 
The Prosopis juliflora of the California botanies, but not DC. 
Lower Sonoran. 
Specimens examined: Lancaster, Elmer 3726; Cushenberry 
Springs, Abrams 2148; San Bernardino, Parish 2928; Abrams 
2148; San Jacinto Lake, Hall rr06; San Felipe, Susan G. Stokes, 
July 25, 1895; San Diego, Herre, July 19, 1902. 
2. Prosopis vELUTINA Wooten, Bull. Torrey Club 25: 456. 
1898. 
Type locality: Several localities were originally cited, but the 
plants from which the description was drawn were collected by 
Pringle “in Arizona on mesas and in valleys,” and by Wilcox “at 
Fort Huachuca, Ariz.” 
Distribution: Southern Arizona southward into adjacent Sonora. 
A single arborescent shrub, apparently indigenous, was found by 
the writer on the sandy river bottom of the San Diego River, near 
Grantville, southwestern San Diego County. Lower Sonoran. 
Specimens examined: Grantville, Abrams 3753. 
3. STROMBOCARPUS. Screw-BEan. 
I. STROMBOCARPUS PUBESCENS (Benth.) A. Gray; Torr. Pacif. R. 
Rep. 5: 360. 1858. 
Prosopis pubescens Benth. Lond. Journ. Bot. 5: 82. 1846. 
Prosopis Emoryi Torr. in Emory, Notes Mil. Reconnois. 139. 
1848. 
Prosopis odorata Torr. & Frem. in Frem. Second Rep. 313. 1845, 
in part. 
Type locality: This species is said to have been collected in 
“California between San Miguel and Monterey,” but the species 
has not since been found in that part of the State. Coulter, the col- 
lector, travelled southward from Monterey to Yuma, and it is 
probable that he obtained his specimens somewhere in the Colo- 
rado Desert along the old San Felipe and Yuma trail. 
Distribution: From the interior and eastern parts of the Mohave 
Desert southward into Lower California and Sonora. Lower 
Sonoran. 
Specimens examined: Near San Bernardino, Parish, July 8, 
