Bigelovia. COMPOSIT.E. 237 



tains in Colorado to the borders of Xew Mexico and Ttah; first coU. hj Parry. Forms 

 approach B. graceolens. 



* * St.vk-appendage^ short-subulate, these and the deltoid-ovate obtuse anther-tips hardly ex- 

 sertod: akeues liiu-ar-oblong, glabrous: involucre campauulate-cvlindraceou.s equalling the 

 15 to 20 tlowers: herbage glabrous throughout. 



B. Bngelmanni, Gray, a span or two high, in tufts from a sufirutescent subterranean 

 branching candex or rootstock : stems simple, very leaf v np to the cvmose [glomerate head* ■ 

 leaves aU narrowly linear (inch or two long, only a line wide), rigid : heads (few or rather 



. numerous in tlie cluster) barely half-inch long: bracts .jf the involucre firm-chartaccms, 

 oblong or innermost lanceolate, regularly imbricated and appressed, outer ,-imilar but short^ 

 all abruptly mucronate or short-cuspidate, slightly greenish below the tip. — Proc. Am! 

 Acad. xi. 7."). —Plains of Colorado at Hugo Station, Engchnann, Parry, Patterson. 



§ -2. Chrysothamxus. Gray. 1. c. Heads narrow or small. 5-flowered (in 

 B. Douglasii sometimes 6-7-flowered), mostly numerous and crowded: inyolucre 

 (anomalous first species excepted) of dry and chartaceous more or less carinate 

 bracts imbricated so as to form 5 conspicuous vertical ranks (less manifestly so 

 when the bracts are less numerous) : corollas narrow : style-appendaa.-S with 

 exserted subulate- or setaceous-filiform appendages : akenes slender : fruticose or 

 suffruticose and brancliino-, vdth entire narrow leaves. — Bigelovia, § 2, DC. 1. c. 

 Ckrysothamnus, Xutt. Trans. Am. Phil. Soc. 1. c. 



* Transition to preceding section : involucral bracts comparatively large, not carinate nor obviously 

 5-stichous, some outer ones foliaceoiis-acuminate or appeudaged : anther-tips very short and 

 obtuse: corollas said to be even '"white." 



B. albida, M. E. Joxes. Shrubby, a foot or two high, more or less resinous-viscid, fasti- 

 giately branched, very leafy : leaves all filiform, mucronate, not obviously punctate : heads 

 fastigiate-glomerate at the summit of the branchlets, 5 or 6 lines long : involucre oblong- 



, turbinate or cylindraceous ; its bracts rather few and coriaceo-chartaceous. lanceolate ; outer 

 with rather rigid subulate-acuminate and recurved or spreading foliaceous tip or appendage ; 

 inner wholly chartaceous and pointless : corollas probably ochroleucous ; loljes of the deeply 

 cleft limb linear-lanceulate : akenes pubescent. — Gray, Proc. Am. Acad. xvii. 209. — Arid 

 districts, east of the Sierra Nevada: t)weus ^'alley, California, coll. ISId, Kellogg. Wells 

 Station, W. Nevada, Marcus E. .Tonus, who states that the flowers are white. 



* * Genuine species, with thinner more chartaceous and carinate involucral bracts, none folia- 

 ceous-tipped: anther-tips lanceolate or narrowly oblong. 



-i— Akenes and ovaries glabrous, 4-6-angled and with broad epigraous disk: pappus rigidulous: 

 corollas 5-toothed or short-lobed: bracts of the involucre acute or acuminate, numerous and 

 strictly 5-stichous, 5 or 6 in each vertical rank: herbage not punctate, .=li,2;htly or not at all bal- 

 samic-resinous: heads half to three-fourths inch long, somewhat fastigiately glomerate. 



- B. depressa, Ge.4t, 1. c. ( lliscurely scal>ro-puberulent and pale, a span or two higli from a 

 decumbent woody base : branches leafy up to the glomerule or fasciculate cyme of few 

 heads : leaves short (about half-inch or less long), lanceolate or lowest rather spatulate, rigid, 

 mucronate-acute, with carinate midrib and no veins : heads half-inch long : involucral bracts 

 lanceolate, gradually acuminate into an almost setaceous tip. — Chri/sot/iamniis depress'/s, 

 Xutt. PI. Gamb. 171. Zoins^r/s depressa, Torr. in SitLrrcaves Rep. 161. — Plains of S. Colo- 

 rado to adjacent New Mexico and S. Utah ; first coll. l>y (^'unbel. 



B. pulcliella, Geat, 1. >.. Glabrous and green, shrubby, 2 or 3 feet high, fastigiately much 

 branched, very leafy up to fastigiate-cymose heads : leaves narrowly linear, plane (inch or 

 less long), rather obtuse, with ciliolate-scabrous margins and midrib not prominent : heads 

 two-thirds to three-fourths inch long : involucral bracts rigid-chartaceous and lower ones ob- 

 scurelv herbaceous on the back, much carinate, acute and cuspidate-mucronate. — Linost/ris 

 pvlchella. Gray, PI. Wright, i. 96; Torr. in Sitgreaves, 1. c. t. 4. — W. borders of Texas to 

 adjacent New Jlexico and Colorado ; first coll. by Wright. 



B. Bigelovii, Gray, 1. c. Canescent with fine close tomentnm when young, glabrate, 

 shrubbv, a foot to a yard high, fastigiately much branched, rigid : branches less leafy, bear- 

 ing a few fastigiate-clustered heads (these half to two-thirds inch high) : leaves nearly fili- 



