108 COMPOSITE. Brickdlia. 



Proc. Am. Acad. i. 46, PI. Lindh. ii. 218, PI. Wright. 1. c. — Hillsides and thickets, Texa.s, 

 Beiiandier, Wrujht, Lindlielmer, &c. Varies into 



Var. laxa, Gray. Pauiculately branched, and the branches bearing numerous smaller 

 (.5 or 6 lines long) loosely disposed and sometimes slender-peduncied 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, Gray. Minutely cinereous or puberuleut, glabrate : stem strict and stout, 2 to 

 4 feet liigh, 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 campauulate, 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. Clacigera dentata, DC. 

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

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

 Berlaridier, Ridddl, Wright, Lindheimer, &c. 



B. brachyphylla, Gray. Minutely pubemlent : stems a foot or two high from a lignes- 

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

 heads, or pauiculately brauclied and polycephalous : leaves oblong-lanceolate, entire or 

 sparingly serrate, half-inch or the larger an inch lozig: heads 5 lines long, 9-1 2-flowered : 

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

 almost ])lumose under a lens. — PI. Wright, i. 84. Clavigera brachyphytki, Gray, PI. Fendl. 

 6.3. — Rocks and ravines, western border of Texas, New Mexico, and Arizoua, Fendlcr, 

 Bigelow, Greene, Lemmon, &c. 



M- ++ ++ Leaves mostly nervosa and narrow, entire, the lower oppot-ite: stems parioulately much 

 branched: heads very numerous, thyrsoid-paiiiculate: akenes usually glabrous: pajipus 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 squamiforna 

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

 thence passing into the bracts of the involucre : heads 10-1 2-flowered, 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 Rita del Cobre, 

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



B. longifolia, Watsox. Suffruticose : flowering branches leafy : leaves lanceolate-linear 

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

 paniculate leafy thyrsus : heads subsessile in snnill 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-lauceolate 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 D. 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. 



-H- ++ ++ -H- Leaves all alternate, spatulate, veinless: stems shrubbj- : heads sparse or solitary. 

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

 leaves spatulate or obovatc, entire, 3 to 5 lines long, including tlie 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. 



