BHckdlia. COMPOSITE. 107 



-K- -i— -1— Leaves sessile, subse5=ile, or the lower short-petioled: heads not pendulous. 

 ■M- Leaves mainly opposite, veiny : heads mostly pedunculate : bristles of the pappus merely sca- 

 brous or barbeUulate-serrulate under a lens: last two species with much imbricated involucre. 

 = Srems liglie^cent at base, slender. 



B. oligantties, Gray. Cinereous-puberulent, a foot or two high : leaves coriace(jus. from 

 oblong ro linear, obtuse, obtusely and often ubseurely serrate, an inch or two long, canescent 

 and the veins very prominently reticulated beneath : peduncles mostly elongated, axillary 

 and terminal, 1-3-cephalous, raceraosely or somewhat corj-mliiisely disposed : heads lialf-iuch 

 long, 10-12-tlowered : bracts of the involucre ranstly acute or acnmiuate : the sliort outermost 

 ovate, innermost linear. — PI. Wright, i. S4, i ii. 71. Eupiitorium olif/anthts. Less, in Linn, 

 iv. 137. BuWostylis oiigant/ies, DC. l*rodr. ^. 139. — S. Arizona, Wright^ T/utrber, Lemmon^ 

 mo.stly a narrow-leaved form. (Mex.) 



B. parVTlla, Gr.it. ^Minutely scabro-pubertilent, low: leaves deltoid-ovate, coarsely few- 

 toothed, green both sides, barely half-inch long . the upper oblonL^ sparse and much >inaller : 

 pedimcles few and slender, niouocei)halous, corvnibosely disposed at the summit of the stems : 

 head 5 lines luug, about 12-flowered; liraLts of the involucre few-ranked ; innermost linear, 

 rather obtuse ; outer broader and niucronate-acute. — PI, Wright, i. 67. — Jlountains of .S W. 

 Texas near the pass of the Eio Limpio, Wright. 



= = Steals herbaceous to the base: leaves reticulate-veiny. 



B. Wislizeni, Ge.vt. Glandular-hirsute. 2 or 3 feet high: cauline leaves lanceolate-oblong 

 with a sube'Tilate closely sessile base, acute, acutely and ntimerously serrate, thin, lo'jsely 

 veiny, 1^ to 3 inches long ; those of the hranches mainly obtuse at base : i«dnncles axillary 

 and simple and as long a- the leai es, or exceeding them on axillary branches, filiform : 

 heads 5 or 6 lines long, 12-20-flnivered: bracts of the involucre all lanceolate and gradually 

 acuminate, or the innermojt linear. — PI. Fiudl. 64 ; PI. Wright, i. S4. & ii. 71. — >- Arizona, 

 on mountain-sides, Wright. (Heads rather smaller and fewer-flowered than in the origiual 

 of adjacent Mex.) 



Var, lanceolata. Loosely p;iniculate-branched and floribtmd, the numeron.5 heads 



^ smaller : leaves broadlv lanceolate, the cauline half-inch wide, tin i.-e of the branches small, 



or the upper minute. — >au Prancisco iloimtains, X. E. Arizona, Greene. 

 B. betonicsefolia, Gr.vt. :More minutely glandtilar-hirsute : stems 1 to 3 feet high, vir- 

 gate: leaves subcordate-oldong. obtuse, crenate or r.l,msely dentate, rugtsely veiny; the 

 lower inosth- with short but distinct petioles : infiorescciice virgate-racemiform : peduncles 

 niostli- shorter and the 12-fiowered heads rather smaller: otliereise nearly as the preceding. 



PI VTright. ii. 72. — HQls, Xew Mexico and Arizona, W fight, Thurber, Greene, &c. 



B. Leminoni, Gr.iy. Cinereous-puberulent, not glandular, slender, a foot or tno high : 

 leaves lanceolate, all acute at 1 ^ase and as if with short margined petiole, remotely or obscurely 

 serrate, lishtly triplinerved (inch or two lonsi : heads (5 or 6 line- loug) numerous in a 



> rather loose narrow leafy th^Trsus, on slender short peduncles, 10-12-tlowered: bracts of the 

 involucre nearly all acute ; the rather few and short outer ones ovate- to oblong-lanceolate, 

 inner linear: akenes eauesceut. — Proc. Am. Acad. xvii. 206. — Chiricahua Motmtains, 

 S. Arizona, Lemmon. 

 ^g_ Pringlei, Gray, 1. c. Cinereous-puberulent and the foliage scabrous : stem strict, rather 

 stout. 2 feet liieli : leaves oblons-lanceolate, acute, mostly ol.tuse at base, on very short but 

 distinct petiole-, somewhat serrate, nearly coriaceous, S-nerved from just above the base, 

 conspicuouslv and beneath saUently reticulated : heads (half-inch long! in a loose and narrow 

 leafv thvrsus, 20-24-flowered : involucre glabrous, rather longer than the scaly-bracteate 

 peduncles : their rounded bracts pas^ing above into the ovate and obttise or barely mucronu- 

 late outer bracts of the involucre, the iimermost of which are lanceolate and acute : akenes 

 canescent. — llocky calious, S. Arizona, Pringle, Lemmon. 

 B. cylindracea, Gray & Exgelm. Cinereous-pubescent, s.i.mewhat scabrous stem com- 

 monlv stout and strict, 2 to 4 feet high: leases oblong-ovate to ovate-lanceolate, mostly 

 obtuse at both ends, obtusely serrate, thickish, 3-nerved or triplinerved from near the sub- 

 sessile base (about 2 inches long) : heads (6 to S lines l.iugl numerous in a virgate racemiform 

 thvr=us, short-peduucled, sometimes almost sessile, 10-flowered : mvolucre cylindrical, closely 

 inibricated ; the broadly ovate outer bracts in se^-e^al ranks, mucronate, multistriate,Tnostly 

 vUlous when young ; inner broadly linear, obtuse or mucronulate : akenes pubescent. — 



