108 COMPOSITjE. BriekelUa. 



Proc. Am. Acail. i. 46, PL Linclh. ii. 218, PI. Wright. 1. c. — Hillsides aud tliickets, Texas, 

 Berlandier, Wriyht, Lindheimer, &c. Varies into 



Var. laxa, Gkat. Paniculately branched, and the branches lieariiig 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. 



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



B. Riddellii, Guay. Minutely cinereous or puberulent, glaljrate : stein 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, 1 5-20-flowered, 4 or 5 liues long : involucre campanulate, some- 

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

 lanceolate : pappus barbellulate under a lens. — PI. Wright, i. 8.3. Clam/era dentuta, DC. 

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

 C. Hi'ddellii, Torr. & Gray, PI. ii. 77. — River banks, middle aud southern parts of Texas, 

 Berlandier, ifiddrll, Wright, Lindheimer, &c. 



B. brachyph^Ua, Gkav. 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 branclied and polycephalous : leaves oblong-lanceolate, entire or 



' sparingly serrate, half-iuch 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 hrachyphytla. Gray, PI. Fendl. 

 63. — Uocks and ravines, western border of Texas, Xew Mexico, and Arizona, Fendier, 

 Bifjelow, Greene, Lemmon, &c. 



++++++ Leaves mostly nervose and narrow, entire, the lower oppopite: stems paniculately much 

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

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



B. squamulosa, Gray. Suffmtescent 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-fiowered, turbinate, about 5 lines 

 long : involucral bracts pluriseriate, thickish, obscurely ner\-ed, green with whitish margins, 

 e.xternally somewhat canescent ; the short outer ones o\'ate or oblong and obtuse, inner 

 narrow and acutish. — I'roc. Am. Acad. xv. 30. — New Mexico near .Santa Rita del Cobre, 

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



B. longifolia, Watson-. Suffruticose : flowering branches leafy : lea^ es 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, S-S-flowered, only 3 lines long : 

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

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

 Thompson, Pithiier. 



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 oliscure lateral nerves : heads 3-.5-flowered : akenes sparsely hairv : other- 

 wise much resembling B. longifolia. — KiAlogg in Proc. t'iilif. Acad. vii. 49; Greene, Bull. 

 Calif. Acad. i. 8. — On rocks, in a caRon of King's River, southern part of the 8ierr:i Ne\ ada, 

 California, ICellogg. 



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

 B. frutescens, Geay. Rigid undershrub ivith divaricate brandies, ciner(ius-]mliescont : 

 leaves sjiatulate or obovate, entire, 3 to .■) lines long, including the attenmite petiole-like base : 

 heads (half-inch long) terminating the branchlets, iihoiU 20-H,iwcred : involucnil bracts rather 

 obtuse; outer ones somewhat yrciaiish-tipped : akenes hi.spidulous-scabrous : bristles of the 

 pappus very minutely but densely serrulate. — Proc. Am. ,\cad. xvii. 207. — Southern bor- 

 ders of California, Sutton llaijes. Palmer, G. R. Vaxeij, Parish. 



