78 University of California Publications in Botany. [VOL. 3 



Common in stony soil of the Lower Sonoran Zone from the 

 northern borders of the Colorado Desert (Santa Maria Mts., 

 Chuckawalla Bench, Cottonwood Pass) across the Mohave to 

 Owens Valley, Inyo Co., and the Charleston Mts., Nevada. 



2. A. Orcuttii Vas. & Rose, Bot. Gaz. xvi. 113, t. 11 (1891). 

 Xylorhiza Orcuttii Greene, 1. c. ORCUTT ASTER. 



Suffruticose, very leafy up to the large heads, 5 to 8 dm. high ; 

 bark pearly-white : herbage glabrous : leaves obovate to oblong, 

 2.5 (to 5?) cm. long, spinulose-toothed, obtuse and cuspidate or 

 acute, the lower ones cuneate at base, the upper ones sessile by a 

 broad base : involucral bracts closely imbricated, linear-lanceolate, 

 the slender green tips often much elongated, usually ciliate on 

 the margins below : rays 2 cm. long, purple or * * lavender to deli- 

 cate mauve color ' ' : achenes white-villous. 



Lower Sonoran Zone of the Colorado Desert : Cariso Creek 

 wash, Dec. 5, 1890, Orcutt; Borregos Springs, Apr., 1895, Bran- 

 degee (leaves acute and bracts ciliate) ; Shaver's Well, east of 

 Mecca, Schellenger, no. 70 (bracts glandular, not ciliate) ; hills 

 just north of Indio, Hall & Greata, no. 5994; Split Mt., Apr., 

 1905, Brandegee. Very common at Cariso Creek, ace. to Orcutt. 



3. A. radulinus Gray, Proc. Am. Acad. viii. 388 (1872). 

 BROAD-LEAVED ASTER. 



Root perennial : stems .7 to 5 dm. high, branching above into 

 a broad open cyme: herbage scabrous-pubescent: leaves oval- 

 obovate to oblong, 10 cm. or less long, sharply serrate above the 

 entire (often attenuate) base: involucre turbinate, 6 to 8 mm. 

 high; bracts imbricated, the outer successively shorter, villous- 

 puberulent, abruptly acutish or obtuse: rays 5 to 10 mm. long, 

 whitish: achenes minutely pubescent. 



Santa Cruz Island, Santa Barbara Co., ace. to Greene ; 12 

 Monterey Co. to Washington and Nevada. 



4. A. Menziesii Lindl., in Hook., Fl. Bor. Am. ii. 12 (1834) ; 

 Torr., Wilkes Exped. xvii. 341, t. 8 (1874). PURPLE ASTER. 



Five to 8 dm. high : stems commonly several from the woody 

 root, erect and rigid, simple or with a few virgate branches above, 

 very leafy up to the inflorescence but commonly naked below at 



12 Bull. Calif. Acad. ii. 401 (1887). 



