COMPOSITE. (composite FAMILY.) 175 



inch or two long : involucre 1 or 2 lines high, hirsute witii rather soft spread- 

 ing hairs, considerably i^iiorter than the soft pappus : flowers whitish. Proc. 



Am. Acad. vii. 355. W. Texas and Colorado to Arizona and California. 



16. BACCHARIS, L. 



More or less shrublty : with alternate simple leaves, and the branches striate, 

 bearing small heads of white or yellowish flowers. 



1. B. Wrightii, Gray. Ihrbaceous from a icoodi/ base, verif smooth and 

 glabrous, a foot or two hi(//i, diffusely branching, sparsely leaved ; slender 

 branches tcrminatea b/j solitan/ heads : leaves Unear, small ; uppermost linear- 

 subulate: involucre campanulate, 4 or 5 lines hitjh- 'its brarts lanreolate, fjradu- 

 all'i acuminate, conspicuously scarious-margined, with a green bsick : pa/t/tus 

 very co])ioiis and plarlser'ial, soft, elongating in fruit, fulrous or jnirplish, four 

 times the length of the scabrous-glandular 8 to 10-nerved akene. — PI. Wright, 

 i. 101. AY. Texas to S. Colorado and Arizona. 



2. B. salicina, Torr. & Gray. Branchnvj shrubs, 3 to \2 ffcl hifjh, gla- 

 brous or nearly so, usuallij viscous, ivith a resinous exudation: leaves mostly 

 subsessile, /'ow oblomj to linear-lanceolate, sparingly toothed, rarely entire : heads 

 or fflomerules pedunculate: involucre campanulate, about 3 lines hitjh ; its brarts 

 ovate and acutish : pappus more or less copious, but mosth/ unisenal, conspicu- 

 ousli/ elongating in fruit, white, soft and flaccid: akenes 10-nerved. — Fl. ii. 258. 

 Colorado to Texas. 



3. '3. glutinosa, Pars. Stems herbaceous above but woody toward the 

 base, 3 to 10 feet hif/h: branches somewhat striate-angled : leaves elongated-lan- 

 ceolate, serrate with few or several scattered teeth on each side, more or less 

 distinctly 3-nerved from near the base, 3 or 4 and the larger 5 or 6 inches 

 long : heads mostly 3 lines long, numerous and con/mboself/ ci/mose at the summit 

 of comparatively simple stems or branches : involucre stramineous : pappus not 

 verij copious, nor flaccid, and elone/ated hardhj at all in fruit: akene 5-ncrved. — 

 From S. California to S. Colorado and Texas. 



17. EVAX, Gjertn. 



Dwarf and depressed annuals, floccose-wuolly. In ours the heads are small 

 and aggregated in terminal folio.se-involucrate glomerules. 



1. E. prolifera, Nutt. Rather stout: stem often a span hii:h. simple 

 and erect, or with ascending branches from the base, bearing numerous small 

 spatulate leaves and a capituliform glomerule, half an inch in diameter ; whenco 

 proceed 1 to 3 nearly leafless branches similarly terminated, sometimes again 

 ])roliferous : fructiferous bracts scarious, oval or oblong, mainly naked ; those 

 embracing staminate flowers more herbaceous ami woolly-tipped, of firmer 

 or more herbaceous texture : .staminate flowers each on a filiform stipe repre- 

 senting an abortive ovary. — Dtapcria prolfera, Nutt. Dry ground, Colorado 

 to the Dakotas and Te.xas. 



18. ANTENNA HI A, Ga^rtn. r.vERL.vsTiN.;. 



Mostly low, canescently and often floccosely woolly herbs, with wjiitish or 

 purplish flowers: bracts of the involucre jtearly white, rose-<.-olor, or brownish, 

 never vellow. 



