224 COMPOSITiE. Baccharis. 



involucre of oblong-Lanceolate or broader bracts : pappus in fruit 3 lines long. — PI. Wright, 

 ii. 83. — Rocky ground, 8. Arizona to San Bernardino Co., California, Wriijht, Palmer, 

 Pdrri/. 

 B. Plummerse, Gray. Loosely pubescent, moderately branched : leaves linear-oljlong, ob- 

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

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

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

 ii. 456. — S. W. California, in mountain ravines behind Santa Barbara and Santa Monica, 

 Miss Plummer, Parish, &c. 



* * Glabrous or nearly' so and smooth, sometimes gUitinous : pappus in fruit slightly if at all sur- 

 passing the st^Ie. 



-1— Bracts of the 15-30-tlowered involucre from oblong to linear, rather firm and witli green centre 

 or costa: receptacle flat: leaves comparatively small and rather rigid, serrate with rigid or 

 spirudose teetli. 



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 (tbe larger an inch or rarely 2 inches 

 long), prominently 1-nerved, sometimes with obscure lateral nerves: heads 2 lines long, nu- 

 merous in a corymbiform or an oblong naked panicle : pappus of the male flowers obscurely 

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

 DC. 1. c. B. piannicce/bi ia ? or thesioides, Gray, PL Wright, ii. 83. — S. Arizona, Wright, 

 Lemmon. (Mex.) 



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

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

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

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

 and shaded hillsides, in Arizona aud New Mexico, Biyelow, Wriylit, Thurber, Lemmon, Rusby. 

 (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 several irregular 

 slender-subulate lobes; those of the brauchlets narrowly linear, 2-3-tootiied or entire: heads 

 loosely paniculate, only the male known, these barely 2 lines high, about 15-flowered : involu- 

 cral bracts oblong: bristles of the pappus rigid, clavellate. — Guadelupe Mountains, western 

 borders of Texas, Havard. 



■Jr- H— 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, DC. Herbaceous nearly or quite to the ground, 3 to 5 feet high, loosely 

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

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

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

 margined petiole : heads numerous and densely cymose at the sammit of naked brauchlets, 

 3 lines long: involucral bracts erose-ciliate : female pappus barely 2 liues long, soft; male 

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

 Gray, Bot. Calif, i. 333. B. Douglasii & B. Ilankei, DC. I.e. 400 & 401, the latter from Mon- 

 terey in California. B. glutinosa. Hook. & Arn. Bot. Beech. 147 ? — Moist or wet ground, 

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



-I— -I— H— Bracts of the involucre broader, thin-chartaceous, rather dry, with narrow scarioiis 



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



the outer bracts ovate, iimcr oblong: heads many-flowered: receptacle flat: stems very leafy 



up to the corymbosely 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 liigh : 



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



scattered teeth on each side, more or less distinctly 3-nerved from near the base (3 or 4 and 



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



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



