Aster Tribe 405 



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

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

 smooth exserted, those of the sterile flowers rudimentary, 

 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. 



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

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

 shore; branchlets angular from the leaf-bases; leaves subcori- 

 aceous. 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 oblanceo- 

 late-linear, mostly entire, 1-nerved ; involucre campanulate or 

 oblong, 6-8 mm. long; bracts firm-coriaceous, the outermost oval 

 obtusish, the innermost 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. 



** Aclienes 5-nerved (rarely 4-nerved . 



3. B. Plummerae Gray. Loosely pubescent throughout, not 

 at all glutinous; stems herbaceous from a woody base, 6-12 dm. 

 high, somewhat branched; leaves linear-oblong, obtuse, irregu- 

 larly and acutely serrate, 5 cm. long or less, obscurely 3-nerved ; 

 heads 8 mm. long; involucral bracts linear; achenes somewhat 

 compressed, puberulent, obscurely 5-nerved; pappus in fruit 8 

 mm. long. 



Topango Canyon. Davidson. 



4. B. Douglasii DC. Glabrous and somewhat glutinous; 

 stems herbaceous nearly or quite to the ground, erect, 12 dm. 

 high or less, simple up to the terminal corymb ; leaves glutinous, 



