108 COMPOSITE. BrichelUa. 



Proe. Am. Acad. i. 46, PI. Lindh. ii. 218, PI. Wright. 1. c. — Hillsides and thickets, Texas, 

 Berlandier, Wright, Lindheimer, &c. Varies into 



Var. laxa, Gkat. Paniculately branched, and the branches bearing numerous smaller 

 (5 or 6 lines long) loosely disposed and sometimes slender-peduncled heads, having fewer 

 bracts to the involucre : leaves of the branches either subsessile or abruptly petioled. — Proc. 

 Am. Acad. xvii. 207. — S. W. Texas, Palmer. 



++ -H- Leaves alternate, veiny: stems herbaceous from a perennial root: pappus barbellate. 



B. Ridd^llii, Gray. Minutely cinereous or puberulent, glabrate : stem strict and stout, 2 to 

 4 feet high, simple or fastigiately branched above, exceedingly leafy to the summit : leaves 

 oblong-lanceolate, rather acute, sparingly denticulate, occasionally more dentate, often 

 entire, thickish, obscurely veiny, 8 to 18 lines long: heads subsessile, numerous, crowded 

 in a leafy spiciform thyrsus, 15-20-flowered, 4 or 5 lines long : involucre campanulate, some- 

 what pubescent ; the bracts f ew-striate, obtuse or mucronate ; the outer ovate, inner oblong- 

 lanceolate : pappus barbellulate under a lens. — PI. Wright, i. 83. Clavigera dentata, DC. 

 Prodr. v. 128, but the character does not well agree, and the specific name is inappropriate. 

 C. Riddellii, Torr. & Gray, PI. ii. 77. — Eiver banks, middle and southern parts of Texas, 

 Berlandier, Riddetl, Wright, Lindheimer, &c. 



B. braohyph^lla, Gray. Minutely puberulent : stems a foot or two high from a lignes- 

 cent caudex, slender, simple, and bearing a few racemosely paniculate slender-pedunculate 

 heads, or paniculately branched and polycephalous : leaves oblong-lanceolate, entire or 

 sparingly serrate, half -inch or the larger an inch long: heads 5 lines long, 9-12-flowered: 

 involucral bracts few, acute, short outermost ovate or oblong, inner linear : pappus-bristles 

 almost plumose under a lens. — PI. Wright, i. 84. Clavigera brachyphylla, Gray, PI. Fendl. 

 63. — Rocks and ravines, western border of Texas, New Mexico, and Arizona, Fendler, 

 Bigelow, Greene, Lemmon, &c. 



-H- -w- ++ Leaves mostly nervose and narrow, entire, the lower opposite : stems paniculately much 

 branched : heads very numerous, tbyrsoid-paniculate : akenes usually glabrous : pappus merely 

 scabrous : plants nearly glabrous. (B. spinulosa, Gray, of Mexico, is of this group.) 



B. squamulosa, Gray. Suffrutescent at base, 2 or 3 feet high : stems or shoots of the 

 first year bearing narrowly linear (2 or 3 inches long, less than 2 lines wide) obscurely 

 3-nerved deciduous leaves; flowering shoots the next year bearing only minute squamiform 

 obtuse leaves of a line or less in length, and closely imbricated on short branchlets and 

 thence passing into the bracts of the involucre : heads 10-12-floivered, turbinate, about 5 lines 

 long : involucral bracts pluriseriate, thickish, obscurely nerved, green with whitish margins, 

 externally somewhat canescent ; the short outer ones ovate or oblong and obtuse, inner 

 narrow and acutish. — Proc. Am. Acad. xv. 30. — New Mexico near Santa Pita del Cobre, 

 Greene. S. Arizona, near Port Huachuca, Lemmon. (San Luis Potosi, Mex.) 



B. longif 61ia, Watson. Suffruticose : flowering branches le^fy : leaves lanceolate-linear 

 (1 to 3 inches long, 2 or 3 lines wide), 3-nerved; upper gradually diminished in the open- 

 paniculate leafy thyrsus : heads subsessile in small clusters, 3-5-flowered, only 3 lines long : 

 bracts of the involucre about 10, of 2 or 3 lengths, conspicuously striate, obtuse. — Am. 

 Nat. vii. 301 ; Rothr. in Wheeler Rep. vi. 139, t. 5. — S. Utah and S. Nevada, Wheeler, Mrs. 

 Thompson, Palmer. 



B. multiflora, Kellogg. Suffruticose : cauline leaves ovate-lanceolate and with divergent 

 lateral nerves, an inch or two long ; those in the crowded panicle from lanceolate to linear, 

 small, and with obscure lateral nerves: heads 3-5-flowered: akenes sparsely hairy : other- 

 wise much resembling B. longifolia. — Kellogg in Proc. Calif. Acad. vii. 49; Greene, Bull. 

 Calif. Acad. i. 8. — On rocks, in a canon of King's River, southern part of the Sierra Nevada, 

 California, Kellogg. 



++++++++ Leaves all alternate, spatulate, veinless : stems shrubby : heads sparse or solitary. 

 B. frutescens, Gray. Rigid undershrub with divaricate branches, cinerous-pubescent : 

 leaves spatulate or obovate, entire, 3 to 5 lines long, including the attenuate petiole-like base : 

 heads (half-inch long) terminating the branchlets, about 20-flowered : involucral bracts rather 

 obtuse ; outer ones somewhat greenish-tipped : akenes hispidulous-scabrous : bristles of the 

 pappus very minutely but densely serrulate. — Proc. Am. Acad. xvii. 207. — Southern bor- 

 ders of California, Sutton Hayes, Palmer, G. R. Vasey, Parish. 



