224 COMPOSIT.E. Baccharis. 



involucre o2 oblong-lanceolate or broader bracts : pappus in fruit 3 lines long. — PL Wright, 

 ii. 83. — Iiocky ground, S. Arizona to San Bernardino Co., California, Wriijht, Puhner,- 

 Parry. 

 B. Plummerae, Gray. Loosely pubescent, moderately branched : leaves linear-oblong, ob- 

 tuse, irregnlarly and acutely serrate, the larger an inch or two long, obscurely 3-nerved : 

 heads 4 lines long : involucre of linear bracts : akenes somewhat comjiressed and puberulent, 

 obscurely 5-nerved : pappus in fruit 4 lines long. — Proc. Am. Acad. xv. 48, & Bot. Calif, 

 ii. 456. — S. W. California, iu mountain ravines behind iSauta Barbara and Santa ilouica, 

 Miss Plummer, Parish, &c. 



* * Glabrous or nearlv so and smooth, sometimes glutinous: pappus in fruit slightly if at all sur- 

 passing the st3'le. 



•i— Bracts of the 15-30-flowered involucre from oblong to linear, rather firm and with green centre 

 or costa: receptacle flat: leaves comparatively sm:ill and ratlier rigid, serrate witli rigid or 

 spiiuilose teeth. 



B. thesioides, HBK. A foot or two high from a woody base : branches rigid and slender : 

 leaves linear-lanceolate or sometimes broader and narrowed to base, nearly or quite sessile, 

 rather closely and evenly ciliately spinulose-serrate (the larger an inch or rarely 2 inches 

 long), prominently 1-uerved, sometimes with oljscure lateral nerves: heads 2 lines long, nu- 

 merous iu a corymbiform or an oblong naked panicle : pappus of tlie male flowers obscurely 

 if at all thickened upward. — Nov. Gen. & Spec. iv. 61 ; DC. Prodr. v. 419. B. ptarmiaifolia, 

 DC. 1. c. B. ptarmica'Jblia? or thesioides, Gray, PL Wright, ii. 83. — S.Arizona, Wri(jht^ 

 Lemmoii. (Mex.) 



B. Bigelovii, Gray. Stems more copiously and loosely branched : leaves less rigid, from 

 linear to obhjug and the broader ones sometimes petioled, irregularly serrate, commonly 

 obtuse : heads larger, more cymose : bristles of the male pappus thickened and barljellate 

 at the tip. —Bot. Mex. Bound. 84. B. pturmicivfoliu? Gray, PL Wright, ii. 83. — Woods 

 and sliaded hillsides, in Arizona and New Mexico, Biijeloiv, \Vri<jht, Thurher, Lemmon, Riisby. 

 (Adj. Mex.) 



B. Havardi, Stems copiously branched, slender : leaves hardly at all rigid ; lower linear- 

 oblanceolate and tapering into a slender petiole, laciniate-pinnatifid into sevez'al irregular 

 sleniler-subulate lobes; those of tlie Ijrauchlets narrowly linear, 2-3-toothed or entire: heads 

 loosely paniculate, only the male known, these barely 2 lines high, about 1 5-fiowered : involu- 

 cral bracts oblong: bristles of the pappus rigid, davellate. — Guadelupe IMountaius, western 

 borders of Texas, Havnrd. 



■i— -1— Bracts of the involucre narrowly oblong or linear-lanceolate, thin and pale with greenish 

 centre : heads short and broad, many-flowered : receptacle hemispherical or broadly conical! 



B. Douglasii, T)Q. Herbaceous nearly or quite to the ground, 3 to 5 feet high, loosely 

 branched : leaves glutinous, not rigid, either entire or serrulate with minute and very acute 

 denticulations, triplinerved from near the base, ovate-lanceolate (the larger 4 to 6 inches 

 long) or the upper lanceolate, Mith attenuate-acute apex, the base contracted into a short 

 margined petiole : heads numerous and densely cymose at the summit of naked branchlets, 

 3 lines long: involucral bracts erose-ciliate : female pappus l)arely 2 lines long, soft; male 

 somewhat clavellate ami barbellate above. — Torr. & Gray, PL ii. 259, excl. syn. Nutt., &c. ; 

 Gray, Bot. Calif, i. 333. B. Doiujlasii & B. Hankei, UC. 1. c. 400 & 401, the latter from 31on- 

 terey in California. B. r/hitiiiosa, Hook. & Arn. Bot. Beech. 147 ? — iloist or wet ground, 

 California, from San Francisco southward, and southeastward to San Bernardino. 



-1— -1— •)— Bracts of the involucre broader, thin-chartaceous, rather drj-, with narrow scarious 

 margins, at least the inner ones j'ellowish or tawny, destitute of green centre or distinct costa; 

 the outer bmcts ovate, inner oblong: heads many-flowered: receptacle flat: stems very leafy 

 up to the corynibosely paniculate or cymose inflorescence, more terete than in the preceding 

 species: leaves lanceolate, willow-like, acute at both ends, either denticulate-serrate or entire, 

 subsessile. 



B. glutinosa, Pers. Stems herbaceous above but woody toward the base, 3 to 10 feet high : 

 branches somewhat striate-angled : leaves elongated-lanceolate, serrate with few or several 

 scattered teeth on each side, more or less distinctly 3-uerved from near the I)ase (3 or 4 and 

 the larger 5 or 6 inches long) : heads mostly 3 lines long or the male smaller, numerous and 

 corymljosely cymose at the summit of comparatively simple stems or branches : involucre 



