156 BOTANY. 



delicate scarious margin; fertile flower with the style and stigma projecting 

 one-fourth its length beyond the truncate, filiform corolla, the copious 

 pappus reaching to the tip of the stigmas; achenia narrowly cylindrical. 

 smooth, covered with minute papilla?: sterile flowers with a less copious 

 pappus and the tube dilated upwardly, deeply (deft. — Southern Arizona, at 

 about 5,000 feet altitude (580, 447). 



Baccharis salicina, T. iy. (i. — Shrubby at base, erect, 6-8 c high, 

 smooth; leaves lanceolate, usually obtuse, entire or irregularly dentate, 

 tapering to a petiole; inflorescence in a compound corymb; heads sessile 

 or with a very short pedicel; scales of the involucre obtuse, broadly ovate, 

 with scarious sub-fimbrillate margins; fertile flowers having a silky pappus 

 twice as long as the truncate flower and its exserted stigma; achenia smooth, 

 cylindrical, with many ribs; receptacle with distinctly fimbrillate alveoli; 

 sterile flowers having less copious pappus and a rather slender tube; flower 

 deeply cleft. — Southern Arizona and New Mexico (771); also from San 

 Luis Valley, Colorado (456); Nevada. 



Baccharis halimifolia, L — Nevada and Arizona. 



Baccharis Wrightii, Gray (PI. Wright. 1, p. 101). — Herbaceous, 

 glabrous, 1-2° high, diffusely branched from the base, the branches some- 

 what flexuose and angular-striate; lower leaves spatulate, 4" long, upper 

 gradually reduced; fertile flowers with lanceolate acute scales to involu- 

 cre, the margins of which are scarious and the middle green; pappus tawny, 

 9" long; achenia 2" long, terete, plainly ribbed and with transverse rugo- 

 sities between the ribs. 1 have not seen the sterile plant; a good 

 description of it is found where the plant was first described. — Central New 

 Mexico at 6,000 feet altitude (93). 



Baccharis Emoryi, Gray (Bot. Mex. Bound, p. 83). — Shrubby, much 

 branched, with the branches sharply ribbed and angular; leaves few, obtuse, 

 linear, 2-7" long; heads small, terminal; scales of the involucre in 4-5 

 series, the outer ones ovate, obtuse, with finely denticulate scarious margins, 

 the inner ones nearly twice as long, linear and acutish; fertile flower with 

 copious white or light-brown pappus, which is 3-5" long: achenia less than 

 a line long; sterile flower with tube gradually dilated upward; pappus of 

 a few bristles, some of which are distinctly clavate. — Arizona. 



