( 463 ) 
Distribution: Rocky places through the Mohave and the 
Colorado Deserts of southern California, eastward to Arizona and 
southern Utah. Lower Sonoran. 
Specimens examined: Palm Springs, Parish 4122; Camp Cady, 
Hall 6130. 
2, COLEOSANTHUS. 
Heads campanulate, terminating corymbose branchlets. 
Leaves ovate, rounded or cordate at base. 
Herbage scabrous-atomiferous, green. 1. C. atractyloides. 
Herbage white-tomentose. 2. C. incanus. 
Leaves linear to oblong or obovate, narrowed at base. 
Inner involucral bracts acuminate; leaves 15-30 mm. long. 
3. C. linifolius. 
Inner involucral bracts merely acutish; leaves 5-15 mm. long. 
4. C. frutescens. 
Heads turbinate, paniculate or glomerate. 
Herbage white-tomentose; involucral bracts acute. 5. C. Nevinti. 
Herbage greenish (except 7); involucral bracts acute. 
Leaves ovate; heads 10-15-flowered. 
Involucre 10-12 mm. high. 6. C. californicus. 
Involucre 7-8 mm. high. 7. C. desetorum. 
Leaves lanceolate; heads 5-flowered. 8. C. Knappianus. 
1. COLEOSANTHUS ATRACTYLOIDES (A. Gray) Kuntze, Rev. 
Gen. PI. 1: 328. 1891. 
Brickellia atractyloides A. Gray, Proc. Am. Acad. 8: 290. 1870. 
Type locality: “Utah, near the Rio Colorado.” 
Distribution: The Mohave and Colorado Deserts of southern 
California, eastward to Arizona and southern Nevada. Lower 
Sonoran. 
Specimens examined: Near Palm Springs, S. B. & W. F. Parish 
i210; northern base of the San Bernardino Mountains, Parish 
3710; Cushenberry Spring, Parish 2387; Colorado Desert, Bran- 
degee, 1901; no locality, Parry & Lemmon 158; Rabbit Springs, 
Parish 4875; Providence Mountains, Brandegee, May 27, 1902. 
2. COLEOSANTHUS INcANUS (A. Gray) Kuntze, Rev. 
Genny Pl. 12 328) 189ne 
Brickellia incana A. Gray, Proc. Am. Acad. 7: 350. 1868. 
Type locality: “Providence Mountain, in the Mohave district.” 
Distribution: In dry washes of the Mohave Desert, eastward to 
southern Nevada. Lower Sonoran. 
