Baccharis. COMPOSITE. 223 



petioled, more or less triplinerved, often with 2 to 4 short lobes or teeth ; those of the 

 branches from oblanceolate to linear, mostly entire, 1 -nerved: heads somewhat nakedly 

 paniculate on the branchlets, short-pedunculate or the glomerules more or less pedunculate : 

 involucre campanulate or oblong, 3 or sometimes 4 lines long, mostly of firm coriaceous and 

 obtuse bracts ; the outermost oval, inner oblong, the innermost thin, linear and acutish : pap- 

 pus of male flowers bearded towards the tip ; of the female in fruit half-inch long. Bot. 

 Mex. Bound. 83, & Bot. Calif, i. 333, described from mere branches. B. pilularis, Nutt. 

 Trans. Am. Phil. Soc. 1. c., partly, not DC. B. salicina, Rothr. in Wheeler Rep. vi. 156, 

 & Bot. Calif, ii. 456, partly. Along watercourses, from Los Angeles southward, through 

 Arizona and in S. Nevada and Utah. 



B. sarothroid.es, GRAY. Erect, fastigiately much branched, 10 to 15 feet high : leaves all 

 nearly linear, entire, 1-nerved, rigid, small ; the larger (less than inch long and 2 lines wide) 

 ' narrowed at base ; those of the slender and strongly striate-angled branchlets commonly 

 sparse and minute : heads loosely paniculate, terminating ultimate naked branchlets, small : 

 involucre of the male campauulate, hardly 2 lines long ; of the female rather oblong, onlv 

 about 10-flowered ; short outer bracts ovate or oval, very obtuse, innermost thin and broadly 

 linear : clavellate tips of male pappus naked : female pappus in fruit 3 lines long. Proc. 

 Am. Acad. xvii. 211. S. California, from San Diego to the Mexican line, Sutton Hayes, 

 Palmer. Has been confounded with B. Emonji and B. sergiloides. (Adj. Mex.) 



* * * Species of Mexican border, with branchlets terete, less striate, pruinose-scabridous. 



B. pteronioid.es, DC. Diffusely branched: leaves small (rarely half-inch long), crowded 

 and fascicled on the branchlets, from lanceolate-spatulate to linear, thickish, nearly veinless, 

 the larger 2-6-dentate : heads singly terminating very short densely leafy branchlets, which 

 are crowded in a virgate or racemose way along the branches : involucre 3 lines long, cam- 

 panulate ; the outer bracts ovate or oblong : pappus of the male flowers not at all clavellate ; 

 of the female in fruit 4 lines long, not much surpassing the corolla. Prodr. v. 410. B. ramu- 

 losa, Gray, PI. Thurb. 301, & Bot. Mex. Bound. 84. Aplopappus ramulosus, DC. 1. c. 350. 

 Linosyris (Aplodiscus) ramulosa, Gray, PI. Wright, i. 97, & ii. 80. New Mexico and Ari- 

 zona. (Mex.) 



3. Pappus rather rigid and scanty, short, not elongated with age, of the fertile 

 flowers even in fruit uot surpassing the style : akeues 10-nerved (the 5 primary 

 nerves sometimes the more prominent) : fertile corollas regularly cleft at apex 

 into 5 subulate lobes : some chaff among the flowers on the sometimes elevated 

 receptacle similar to the innermost involucral bracts : branches broom-like. 



B. Sergiloides, GRAY. Suffruticose, glabrous, 3 to 5 feet high, very much branched ; the 

 slender and partly herbaceous branches and branchlets strongly striate-angled and naked, 

 bearing a few small leaves and paniculate mostly short-pedunculate heads : larger leaves 

 spatulate, entire, rarely 2-4-toothed (the larger seldom over half-inch long) : heads 2 or 3 

 lines long: bracts of the involucre small, oblong or lanceolate, rather obtuse, of firm texture: 

 fertile pappus barely twice the length of the mature akenes. Bot. Mex. Bound. 83, Pacif. 

 R. Rep. iv. 101, & Bot. Calif, i. 333, partly, and not well characterized. Arid districts of 

 S. E. California and adjacent Nevada to S. W. Utah, Bicjelow, \VTieeler, Palmer, Parish, &c. 

 Varies in the amount of imbrication of the involucre, and the number of chaffy scales ; when 

 these are numerous the receptacle becomes conical and the disk very convex. 



4. Pappus of the fertile flowers not flaccid, little if at all elongated in fruit, 

 not very copious : akenes only 5-nerved, sometimes 4-nerved. Southwestern, 

 chiefly Pacific species. 



* Scabro-puberulent or pubescent throughout, not glutinous : fruiting pappus manifestly surpass- 

 ing the style: heads loosely paniculate: bracts of the involucre scarions-margined from a green 

 or greenish back or centre, acute or acuminate: stems herbaceous from a woody or merely lig- 

 nescent base, 2 or 3 feet high : leaves not rigid. 



B. brachyphylla, GRAY. Minutely scabro-puberulent, diffusely much Branched, slender : 

 leaves small, entire, mostly linear, 1 -nerved, the larger cauliue seldom over half-inch long, on 

 the branchlets mostly becoming minute and scale-like: heads 3 lines long, 12-15-flowered: 



