136 COMPOSITE. Bigelovia. 



(excl. 3) ; Gray, Proc. Am. Acad. viii. 638 ; Benth. & Hook. Gen. ii. 1232. 

 ('hn/snthamnus, Nutt. Trans. Am. Phil. Soc. ser. 2, vii. 323; Benth. & Hook. 

 Gen. ii. 255. Linosyris, Torr. & Gray, Fl. ii. 232, not Cass., which Old- World 

 irenns differs in that its heads when perchance heterogamous are heterochromous. 

 The various types in the genus are connected by gradations, so that the sections 

 are not very distinct. 



1. CIIRYSOTHAMNOPSIS, Gray, 1. ci Heads comparatively large but narrow, 

 at least half-inch long, ,5-20-flovvered : bracts of the involucre comparatively 

 large, chartaeeous and acuminate, and some outer ones prolonged into a slender 

 herbaceous tip or appendage ; when numerous the vertical ranks become more 

 or less apparent: corollas 5-toothed or barely 5-lobed at summit: low and suffru- 

 tescent, with linear entire leaves, not punctate nor viscid or resinous, except that 

 the first species is slightly so. 



* Genuine: style-appendages setaceous-subulate or filiform, conspicuously exserted out of the 

 corolla: akenes slender, sericeous-pubescent: anther-tips oblong-lanceolate: involucre cylin- 

 draccoiis, shorter than the developed (5 to 15) (lowers and pappus: steins or branches whitened 

 (at least when young) by a close pannose tomcntum: heads thyrsoidly paniculate or glomerate. 

 Connects on one hand with Aj>li.>p(ijij>u.f Jf<n-r<tt/it, on the other with Chrysothamnus. 

 B. ceruitiiiH'x-i, of the latter, approaches this group. 



i Bracts of the involucre comparatively few, not showing obvious vertical ranks. 



B. Bolanderi, GRAY, 1. c. Leaves oblanceolate-liuear or narrower, green aud glabrate, 

 somewhat viscidulous (about inch long), very obscurely 3 -nerved : heads few and clustered, 

 sometimes three-fourths inch long, 5-1 1-flowrrfd : bracts of the involucre only about 10, thin- 

 chartaeeoiis, lanceolate, with a soft acuminate apex, or one or two outermost herbaceous- 

 tipped : alveoli of the receptacle paleaceous-dentate. B. Bolanderi & B. Howardii in part 

 (sp. 15. .land.), Gray, But. Calif, i. 315, 316. Linosyris B<il<nnleri, Gray, Proc. Am. Acad. 

 vii. 354. Mono Pass in the Sierra Nevada, California, at 10,000 feet, Bolander. 



B. Parryi, GH.YY, I.e. Not viscidulous: stems rather strict, leafy to the summit: leaves 

 linear (2 or 3 inches long, 2 lines or less wide), obscurely 3-nerved, glabrous; upper ones 

 hardly diminished in si/.e and overtopping all the heads of the strict and narrow thyrsiform- 

 virgate panicle: heads little over halt-inch long, 10-15-flowered : bracts of the involucre 

 about 12, lancei.la.to and gradually acuminate, rather prominently 1-nervecl, thin-chartaceous, 

 a few oxtorior I a poring into a prolonged subulate-linear herbaceous appendage: alveoli of 

 receptacle short and nearly entire. Linost/ris Purriji, Gray in Proc. Acad. Philad. 1803,66. 

 1'arks of the Colorado Rocky Mountains, Porri/, Hull & Harbour, &c. 



-i -i Bracts of the involucre more numerous and disposed to fall into 4 or 5 vertical ranks, in 

 the manner of Chrysothamnus. 



B. Nevadensis. Rigid, more branching, cinereous-puberulent or tomentulose when young : 

 leaves coriaceous, oblanccolate to linear, mucronate (the mucro generally recurving), ob- 

 scurely or not, at all 3-norved, at most inch long: heads few and glomerate at the naked 

 . summit of the branches, often three-fourths inch long, 5-flowered : bracts of cylindrical 

 involucre more imbricated and numerous (15 to 18), rigid-chartaceous, pubescent or some- 

 what, hirsute-ciliate, all with prolonged slender acumination, outer broadly lanceolate or 

 oblong and with prolonged slender-subulate tip or appendage recurving and rigid. 

 B. l/ninn-i/i, \ar. Xinulcnsis, Gray, Proc. Am. Acad. viii. 641, & Bot. Calif, i. 316. /.//"<- 

 si/rix Ilnii-itrili. var. X> riitlfiisis. Gray, 1. c. vi. 541. Eastern and arid portion of the Sierra 

 Nevada, <<., on the borders of California and Nevada, Bloomer, Anderson, Brewer, Watson, 

 &c. Is the analogue of Aplopappus Bloomeri, 



B. Howard!, Gu.vv. Lower, more tufted, canescently tomentulose when young : leaves 

 narrowly linear, rigid (an inch or two long, barely aline wide), obscurely 1 -nerved ; upper 

 mostly overtopping the glomerate (about half-inch long) narrow heads: involucre 5-flow- 

 ercd, glabrous ; its brads tliinuish, lanceolate, apiculate-acuminate, or some loose outer ones 

 with prolonged subulate-filiform appendage. Proc. Am. Acad. viii. 641, excl. var. Linosyris 

 Howurdi, Parry, in Gray, Proc. Am. Acad. vi. 541, excl. var. Parks of the Rocky Moun- 



