372 ASTERACEAE. 



length of the style; hermaphrodite flowers only 5-7; achenes nearly 

 glabrous; pappus bristles several, scabrous. 



Occasional in subsaline places. July-September. 



20. BACCHARIS L. 



Dioecious perennial herbs or shrubs, with alternate 

 leaves and small paniculate or corymbose heads of tubu- 

 lar flowers. Involucre of scale-like imbricated bracts. 

 Receptacle flat, naked. Corolla of the pistillate flowers 

 slender, truncate or minutely toothed, that of the stami- 

 nate tubular, 5-lobed. Style-branches of the fertile 

 flowers smooth, exserted, those of the sterile flowers rudi- 

 mentary, tipped with an ovate pubescent appendage. 

 Achenes more or less compressed, ribbed. Pappus of 

 the pistillate flowers copious, capillary, very fine and 

 soft, becoming elongated in fruit, that of the staminate 

 flowers shorter. 



Achenes 10-nerved; shrubs. 



Ultimate leaves obovate obtuse. 1. B. pilularis. 



Ultimate leaves linear-oblong, becoming sparse 



on the rather naked panicle. 2. B. emoryi, 



Achenes 4-5-nerved. 



Leaves glabrous and more or less glutinous. 



Shrubs with willow-like leaves. 3. B. viminea. 



Herb; leaves lanceolate. 4. B. douglasii. 



Leaves pubescent. 5. B. plummerae. 



\. B. pilularis DC. Compactly branched evergreen shrub, 

 2-4 m. high or lower and depressed when growing along the sea- 

 shore; branchlets angular from the leaf-bases; leaves subcoriaceous, 

 glutinous, 2 cm. long or less, cuneate-obovate, coarsely toothed or 

 some entire; involucre nearly hemispheric, 4 mm. long, its bracts 

 oval or oblong, all but the innermost very obtuse; flowers white; 

 fertile pappus not over 8 mm. long. 



Near Santa Monica, Davidson. 



2. B. emoryi Gray. Erect with slender branches, 1-5 m. high; 

 leaves mostly oblong, or the lower broader, with attenuate or cuneate 

 base and the larger somewhat petioled, more or less 3-nerved, 

 often 2-4-toothed, pale; those of the branches oblanceolate-linear, 

 mostly entire, 1-nerved; involucre campanulate or oblong, 6-8 mm. 

 long; bracts firm-coriaceous, the outermost oval obtusish, the inner- 

 most thin, bearded toward the tip; pappus of the pistillate 12 mm. 

 long in fruit. 



In low ground toward the coast. Redondo; San Pedro; Santa 

 Ana; San Bernardino. 



3. B. viminea DC, Shrubby and willow-like, producing short 

 lateral flowering branches, these terete and minutely striate; leaves 



