106 COMPOSITE. BricMlia. 



H- -H- Foliose, i. e. the heads sessile or short peduncled, terminating short leafy branchlets or in 

 axillary clusters, forming a spiciform, paniculate, or interrupted leafy thyrsus. 



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

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



a. Leaves mainly with truncate or subcordate base, crenate or dentate, but not laciniatc: involucral 

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

 heads 10-20-llowered, 4 or 5 lines high. 



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

 of. B. floribunda, except that the inflorescence is thyrsoid-paniculate, minutely puberulent : 

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

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

 equally dentate to or above the middle. Mountains of New Mexico, Gretnc, Iiusby, G- R. 

 \ 'nsr ;/, and of S. Arizona, Leminon. 



B. WYightii, GI;AY. Usually much branched from a woody base, 2 to 4 feet high, puberu- 

 lent, sometimes a little scabrous : leaves broadly deltoid-ovate, or rounded-cordate and obtuse, 

 or at most acute (but not prolouged upward), more or less creuate-deutatc (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. PL Wright, 

 ii. 72. B, California, var., Gray, PI. Feiidl. G4. 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. ten era, Gray, PI. Wright, ii. 72. Mountain ravines, S. Ari- 

 zona, \\'ri'/lit, L'linii'm. 



Var. reiliformis. Leaves also thin, broader than long, some of them quite rcniform, 

 coarsely creuate, mostly surpassing the glomerules of heads. B. rriiiformis, Gray, PI. 

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

 this is an extreme form. Mountain valley near the western border of Texas, Wrirjht. 



B. Californica, GRAY. Moderately and virgatcly branched, 2 or 3 feet high, minutely pu- 

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

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

 forming an interrupted strict thyrsus. PI. Fendl. 64, PI. Wright, i. 85, & Dot. Calif, i. 300. 

 Bulbostylis C'liritnil/csti, DC. Prodr. v. 38, as to Calif, plant. B. Cn/ifornica, Torr. & Gray, 

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

 Arizona, and Utah ? 



b. Leaves ctmeate at base, tapering into the petiole, very numerous, incised or deeply toothed, sel- 

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

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

 branched and shrubby, 2 to 5 feet high. 



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

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

 heads 15-18-flowered. PI. Wright, i. 87. Mountains of S. W. Texas, east of El Paso, 

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



B. laciniata, GRAY. Leaves thin, puberulent and somewhat scabrous, ovate-cuneate and 

 oblong, laciniate-toothed or lobed, obscurely veiny : heads 9-12-flowered. PI. Wright. 

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

 Paso, Wriyht. S. Arizona, Thurber. (Mcx., first coll. by Berlandier.) 



= = Involucre of firmer bracts, the outer with greenish and somewhat spreading tips, outermost 

 loose and herbaceous and passing into the small leaves of the branchlets. 



B. micropliylla, GRAY. Glandular-puberulent or pubescent and viscid, a foot or two high 

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

 nated by 1 to 3 heads : leaves subcordate or ovate to oblong, when old somewhat 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-inch long, about 15-flowered. 

 PL Wright, i. 85 ; Bot. Calif, i. 300. Bulbostylis microphylla, Nutt. Trans. Am. Phil. Soc. 

 n. ser. vii. 287 ; Torr. & Gray, Fl. ii. 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. Var. 

 SCABRA, Gray, Proc. Am. Acad. xi. 74, is a small-leaved scabrous form. 



