106 COMPOSITiE. ErickelUa. 



++ H-r Foliose, i. e. the heads sessile or short pedimcled, terminatinp; short leafy branchlets or in 



axillarj' clusters, forming a spiciform, paniculate, or interrupted leafy thyrsus. 

 = Involucre naked at base, all tlie bracts dry and chartaceous, glabrous and smooth, the outer- 

 most very short and appressed, wholly destitute of green tips. 

 u. Leaves mainly with truncate or subcordate base, crenate or dentate, but not laciniate : involucral 

 bracts all obtuse, or innermost linear ones abruptly acute; short outermost oval and ovate: 

 heads 10-20-fli)wered, i or 5 lines high. 

 B. Rlisbyi. Tall, copiously branched, largely herbaceous, amply floriferous, with the habit 

 of D. flonbunda, except that the inflorescence is thyrsoid-pauiculate, minutely puberulent : 

 leaves (2 to 4 inches long) from deltoid-ovate to ovate-lanceolate, with truncate or some 

 ' with more or less cuneate base, gradually tapering to an acute or acuminate apex, un- 

 equally dentate to or above the middle. — Mountains of New Mexico, Greene, Rushij, G- R. 

 Vasei/, and of S. Arizona, Lemnion. 

 -B. "Wrightii, Gray. Usually much branched from a woody base, 2 to 4 feet high, puberu- 

 lent, sometimes a little scaljrous . leaves broadly deltoid-ovate, or rounded-cordate and obtuse, 

 or at most acute (but not prolonged upward), more or less crenate-dentate (larger cauliue an 

 inch and a half long, smaller only half -inch) .• heads glomerate-paniculate, the clusters 

 shorter than or little surpassing the subtending leaves ; involucre often purple. — PI. Wright, 

 ii. 72. B. Califormca, var.. Gray, PI. Feudl. 64. — W. borders of Texas to Colorado and 

 Arizona, where it is not clearly distinguishable from B. Californica. 



Var. tenera. A form with thin dilated-ovate leaves, fewer heads, and pale involucre, 

 evidently growing in shade. — B. tenera. Gray, PI. Wright, ii. 72. — Mountain ravines, S. ^Vri- 

 ^^ zona, Wright, Lemnion. 



Var. reniformis. Leaves also thin, broader than long, some of them quite reniform, 

 coarsely crenate, mostly surpassing the glomerules of heads. — B. reinformis, Gray, PI. 

 Wright, i. 86 ; an older name than B. Wrightii, but inappropriate for the species, of which 

 this is an extreme form. — JNlountain valley near the western border of Texas, Wright. 

 "B. Californica, Ge.vy. Moderately and virgately branched, 2 or 3 feet high, minutely pu- 

 berulent : leaves ovate, obtuse, rarely subcordate, somewhat crenate-dentate, commonly an inch 

 or less long, mostly surpassed by the small clusters of heads, these rather spicately glomerate, 

 forming an interrupted strict thyrsus. — PI. Pendl, 64, PL Wright, i.. 85, & Bot. Calif, i. 300. 

 Bulliosti/lis Cavanillesii, DC. Prodr. ^. 38, as to Calif, plant. B. Californica, Torr. & Gray, 

 Fl. ii. 79. — California, from Mendocino Co. southward to adjacent parts of Nevada and 

 Arizona, and Utah ? 



b. Leaves cuneate at base, tapering into the petiole, very numerous, incised or deepl}' toothed, sel- 

 dom an inch long, the upper about equalling the glomerate heads in their axils: involucre 

 narro\\', 4 or 5 lines long; bracts mostly obtuse, the outer oblong, innermost linear: much 

 branclied and shrubby, 2 to 5 feet high. 



B. baccharidea, Gr.vy. Leaves coriaceous, resinous-atomiferous and very glutinous, 

 rhombic-ovate or oblong, and with 2 to 5 strong tectli to each margin, much reticulated: 

 heads 15-18-flowered. — PL Wright, i. 87. — Mountains of S. W. Texas, east of EI Paso, 

 Wright. San Francisco Mountains, N. E. Arizona, Greene. 



B. laciniata, (iR-W. Leaves thin, puberulent and somewhat scabrous, ovate-cuneate and 

 oblong, laciniate-toothed or lobed, obscurely veiny: heads 9-12-flowered. — PI. Wrir;ht. 

 i. 87. B. dentatn, Schultz Bip. Bot. Herald, 301, excl. syn. DC. — S. W. Texas, east of" El 

 Paso, Wright. S. Arizona, TAuiia-. (Mcx., first coll. by Ber/anrfio-.) 



= ^ Involucre of iirmer bracts, the outer with greenish and somewhat spreadhig tips, outermost 

 loose and hci-baceous and passing into the small leaves of the branchlets. 



B. microph^lla, Gnvv. Glandular-puberulent or pubescent and viscid, a loot or two high 

 from a partly woody base, paniculately much branched; the short leafy branchlets termi- 

 nated ))y 1 to 3 heads: leaves subcordate or ovate to oblong, wlicn idd S(5mewhat scabrous, 

 obtuse or apiculate, sparingly denticulate or nearly entire, the larger half-inch long, those of 

 flowering branchlets aline or two long; heads nearly half-incli long, about 15-flowered. — 

 ■ PI. Wriglit. i 85; Bot. Calif, i. 300. Biilhosti/lis microphglUt, Nutt.^Trans. Am. Phil. Soc. 

 u. ser. vii. 287 ; Torr. & Gray, Fl. i. 79. —Dry interior of Oregon and California in the east- 

 ern part of the Sierra Nevada to Idaho, the mountains of Utah, and S. W. Colorado; first 

 coll. by Niillall. 



