96 University of California Publications in Botany. [ VoL - 3 



1. B. pilularis DC., Prodr. v. 407 (1836). 



Compactly branched shrub, 1 to 3 m. high or much lower and 

 sometimes prostrate when growing near the sea : branchlets an- 

 gular: leaves sessile, cuneate-obovate, very obtuse, 1 or 2 cm. long, 

 coarsely or sinuately few-toothed, or occasionally entire: heads 

 solitary or several in the axils or in terminal clusters on the 

 numerous leafy branchlets, short-cylindric or ovoid; involucre 

 4 mm. high ; the outer bracts broadly, the inner narrowly oblong, 

 sometimes denticulate at apex: achenes 10-nerved: pappus of the 

 fertile flowers abundant, becoming 10 mm. long, that of the 

 staminate flowers dilated at apex. 



Upper Sonoran Zone : near Santa Monica, Davidson, Hasse, 

 Barber; Port Harford, San Luis Obispo Co., Davy, no. 2715, in 

 part ; San Miguel Island, Greene ; more plentiful from Monterey 

 to Oregon. 



2. B. Emoryi Gray, Bot. Mex. Bound. 83 (1859). B. sali- 

 cina Gray, Bot: Calif, ii. 456 (1880), in part; not B. salicina T. 

 & G. 



Moderately branched erect shrub, 1 to 4 m. high; branchlets 

 striate-angled : leaves linear to oblong or oblanceolate, obtuse at 

 apex, spatulate or attenuate at base, the larger ones (2 to 4 cm. 

 long) 3-nerved and commonly with several short broad teeth : 

 heads in small glomerules terminating short nearly naked pe- 

 duncles, the whole inflorescence forming a more or less open 

 panicle : involucre campanulate or oblong, 6 mm. high, closely 

 imbricated ; its outer bracts oval, firm, bordered by a narrow 

 scarious minutely ciliate margin ; the inner bracts oblong to 

 linear, thin : achenes glabrous, 10-nerved : pappus of the fertile 

 flowers copious, in fruit 10 or 12 mm. long, of the staminate 

 flowers scant and bearded at the tip. 



In moist places of Upper and Lower Sonoran zones : Los 

 Angeles; Riverside; San Diego; Colorado Desert; plentiful at 

 Redondo, San Pedro, etc., ace. to Parish; also in Arizona, 

 Nevada, and Utah. 



3. B. sarothroides Gray, Proc. Am. Acad. xvii. 211 (1882). 

 Erect fastigiately much branched shrub, 2 or 3 dm. high: 



twigs striate-angled, very numerous and slender, forming 



