(485 ) 
19. SENECIO. GrounpseEt. 
1. SENEctio Douctasi DC. Prod. 6: 429. 1837. 
Senecio regiomontanus DC. Prod. 6: 429. 1837. 
Senecio longilobus Benth. Pl. Hartw. 18. 1839. 
Senecio filifolius Nutt. Trans. Am. Phil. Soc. 7: 411. 1847. 
Senecio Riddellit Torr. & Gray, Fl. N. Am. 2: 444. 1840. 
Senecio Blochmanae Greene, Erythea 1: 7. 1893. 
Type locality: “In California.” First collected by Douglas. 
Distribution: Lake County, southward to Lower California, and 
eastward to western Texas and Nebraska; common in dry sandy 
washes. Upper and Lower Sonoran. 
Specimens examined: Tia Juana, Abrams 3511; Lytle Creek 
Canyon, Abrams 2690; Little Santa Anita Canyon, San Gabriel 
Mountains, Abrams 2646; near Orange, Agnes M. Bowman, June, 
1899; San Felipe, Susan G. Stokes, July 24,1895; near San Ber- 
nardino, Parish 5103; Acton, Elmer 3735; Sespe Creek, near 
Ten Sycamore Flat, Abrams &F McGregor 170; Cajon Pass, Abrams 
&F McGregor 697. 
