224 COMPOSITE. Baccharis. 



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

 ii. 83. Rocky ground, S. Arizona to San Bernardino Co., California, Wright, Palmer, 

 Purr i/. 



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

 Plummer, Parish, &c. 



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

 passing the style. 



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

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

 spinulose teeth. 



B. thesioid.es, 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 spiuulose-serrate (the 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. ptarmiccefolia, 

 DC. 1. c. B. ptarmiccefolia ? or thesioides, Gray, PI. 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. ptarmiccefolia? Gray, PI. Wright, ii. 83. Woods 

 and shaded hillsides, in Arizona and New Mexico, Biyelow, Wright, Thurber, Lemmon, Rushy. 

 (Adj. Mex.) 



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

 oblanceolate and tapering into a slender petiole, laciuiate-piunatifid into several irregular 

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

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

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

 borders of Texas, Havard. 



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

 centre : heads short and hroad, 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, either 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 summit of naked brauchlets, 

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

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

 Gray, Bot. Calif, i. 333. B. Douglasii &. B. Hcenkei, DC. 1. c. 400 & 401, the latter from Mon- 

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

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



H -1 * Bracts of the involucre broader, thin-chartaceous, rather dry, with narrow scarious 

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

 the outer bracts ovate, inner 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 high : 

 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 6 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 



