Baccharis. COMPOSITE. 333 



* * Leaves long and narrow, acute, sharply serrulate or entire : heads in a naked com- 

 pound corymb or cyme terminating the herbaceous striate flowering branches : bristles 

 of the pappus in fertile flowers less copious (20 to 30) and little elongating. 



2. B. Douglasii, DC. Shrubby at base, glutinous : leaves lanceolate and very 

 acute, or the lower ovate-lanceolate (3 or 4 inches long) and sharply more or less 

 serrulate, triple-ribbed, the uppermost smaller and narrow : heads numerous in a 

 terminal compound corymb : scales of the involucre in the sterile heads broadly, in 

 the fertile narrowly lanceolate-linear, the scarious margins erose-ciliate : receptacle 

 conical ! Torr. & Gray, Fl. ii. 259, excl. syn. Nutt. &c. 



Sandy soil and borders of swamps, San Francisco to Los Angeles. The flowering branches are 

 herbaceous. Bristles of the pappus in the fertile flowers denticulate-scabrous. 



3. B. viminea, DC. More shrubby, hardly glutinous, paniculately branched : 

 leaves lanceolate, acute at both ends, entire or sparingly denticulate (one to barely 

 three inches long), indistinctly 3-nerved : heads (3 lines high) rather numerous in 

 terminal corymbs and somewhat racemose clusters on short lateral branches : scales 

 of the involucre very thin, broadly lanceolate or the outer ones triangular-ovate, 

 with scarious margins erose and mostly villous-ciliate : receptacle flat (as in most 

 species) : pappus of the fertile flowers of smooth bristles. 



Border of streams, Napa Co. to Los Angeles. A willow-like shrub : foliage eaten readily by 

 horses and mules. This has been confounded sometimes with B. Douglasii in collections. 



4. B. glutinosa, Pers. Suffruticose, less branched than the last : leaves lanceo- 

 late or linear-lanceolate, 2 to 4 inches long, 3-nerved from near the base : heads 

 numerous in a terminal compound corymb, rather smaller than in the last : the 

 scales of the involucre similar but of firmer and more chartaceous texture : bristles 

 of the pappus scabrous-denticulate. B. Pingrcea, Nutt. in Trans. Amer. Phil. Soc., 

 not of Molina, B. ccerulescens, var., Gray in Bot. Mex. Bound. 83. 



San Diego, NiMall. Los Angeles, Wallace. We cannot now ascertain whether this is 

 Hooker and Amott's B. glutinosa, but it appears to be the Chilian species, and B. Alamani, DC., 

 of Mexico, seems hardly different. 



5. B. Ccerulescens, DC. Suffruticose, 2 to 8 feet high, scarcely glutinous : 

 leaves lanceolate, 3 or 4 inches long, acute or acuminate at both ends, sharply and 

 rather remotely serrate or serrulate, 3-nerved from near the base : heads very numer- 

 ous in a compound terminal corymb, small : involucre only 2 lines high ; the scales 

 chartaceous, lanceolate or the outermost ovate-lanceolate, with very narrow and 

 nearly naked scarious margins : pappus of the fertile flowers of scabrous bristles. 



San Diego and San Luis Key (Parry), Fort Mohave (Cooper, Schott), and through Arizona to 

 Texas and Mexico. 



* * * Leaves small and narrow, obtuse, or the paniculately much-branched stems and 

 slender rush-like striate-fingled branchlets nearly naked. 



6. B. Emoryi, Gray. Suffruticose : leaves linear, scattered, half an inch or less 

 than an inch long, entire : heads solitary terminating the paniculate branchlets : 

 involucre of the sterile heads 2, of the fertile 3 lines high ; the scales subcoriaceous, 

 obtuse, the outer ovate, innermost linear : pappus of the fertile flowers fine and copi- 

 ous, attaining half an inch in length : akenes 10-striate. Bot. Mex. Bound. 83. 



San Diego and San Bernardino counties, and in Arizona. 



7. B. sergiloides, Gray, 1. c. Suffruticose : flowering branches often leafless : 

 leaves spatulate or almost linear, a third or a quarter of an inch in length, or 

 reduced to mere scales, mucronate, entire : heads numerous and panicled, the sterile 

 ones mostly clustered : involucre of the sterile heads 1 ^, of the fertile 2 lines high ; 

 the scales ovate-lanceolate, or the innermost linear, rather acute : pappus of the 

 fertile flowers less copious and little exceeding the involucre : akenes few-nerved. 



Southeastern borders of California, Bigelow, Dr. Le Conte, Palmer. Also in Arizona. 



