Bigelovla. COMPOSITE:. 139 



•f^ ++ ++ •!-* Leaves numerous, from filiform-linear or involute-filiform (but mostly plane or oulv 

 canaliculate) to broadly linear or lanceolate, not resincus-punctate but sometimes viscidulous : 

 heads £astigiaie-<. vmu<e or somewhat thvrsoid: bracts of the involucre obtuse or somewhat acute 

 and muticous (iu one ambiguous form even pointed!): slender styk-api^euda^'es well esserted, 

 especially in the lir-t species. 



= At lea^t the branches when young, and commonly in age, whitened by a close pannose tomen- 

 tnm: jubutate-filiform style-appenjages longer than the stigmatic portion: pappus soft. 



B. graved ens, Ghay. A foot to a yard or more hish. bearing numerotis crowded heads : 

 these half or two-thirds inch high : leaves mosrly flocculent-tumeutose when young, often 

 glabrate in age. not rigiil : the larger spatulate-linear, or linear-lanceolate (2 iuches hjig and 

 fully -2 lines wide, obscurely if at all 3-nerved) ; the narrowest almost fUiform. at lea-rt when 

 dry. and margins involute : involucre tliin-chartaceuiis when dry : corolla-lobes or teeth 

 sh'jTt. from lanceolate to nearly ovate: akeues linear: papjais soft. — Pruc. Am. Acad, 

 viii-. 644. — The typical form of this polymorpliuus speeies ha- the braits of sometimes vis- 

 cidulous involucre narrowly oblong to linear-lanceolate, rather olituse to acutish or even 

 quite acute : short coroUa-lobes commonlv oblong-lanceolate, varvtng to nearlv ovate and 

 shorter, the tube naked or nearly S'). — Clirijsocoma dracnncutoidfs, Pursh, Fl. ii. .517, not Lam. 

 C. yraveolciis, Xutt. Gen. ii. 136. Birjdovia dracunculoides, DC. Prodr. v. 329. Cluriisothamnus 

 diacuncuhldes & C. ^jtfC:'o.<iis. Xutt. Trans. Am. Phil. Soc. 1. c. Liuoiijris giaveohns, Torr. i 

 Gray, Fl. i. 234. — .Sterile and especially alkaline soil, Dakota to British Columbia, and 

 south to S. California and ^Xew ^Mexico. Heads sometimes cymose, sometimes thyrsoid- 

 glomerate. Forms of the latter occur with firmer involucral bracts, some of them even 

 acuminate, as if connected with B. Hoicardi. 

 Var. glabrata, Gi;at, 1. u. Includes forms of the above with the nsnally narrow 



• leaves early glalirate or perhaps glatjrous from the first, s'aaerime^ li;ilsjniic, s.pmetimes not. 

 — Includes Lmosyris ciscidijiora, Huuk. Lond. Jour. Bot. vi. 243, in part. no. 102, Gei,er, 

 from the northern Rocky Mountains, and Bigelovia L'un'jlasii. var. stenojihyVa, Gray, Bot. 

 Calif, i. 614, from the southern borders of California, Palmer. Xot rare in Colorado, where 

 even the liranches soniecimes eaily lose their light tomentum. 

 s Var. albicaiilis, Grat, 1. c. Branches for the most part permanently and very 



denselv white-tomentose and leaves floccose-tomentose : involucre either tomentulose or gla- 

 brate ; its bracts commonly acutish : corolla-lobes more or less lanceolate and the tube vil- 

 lous- or arachnoid-pubescent. — Chrysocoma naus'osa, Pursh, 1. c, Xutt. Gen. 1. c, therefore 



. Blielovia ijissouriensis, DC. 1. c, but chietly found w est of the Eocky ilountains. Chryso- 

 thamnus specivsus. var. albicaulis, ;>^utt. Trans. Am. PhU. ^e^e. 1. c. Linosyrls alhicavlis, Torr. 



. & Grav, Fl. ii. 2:34. — Kocky ilouutains of Wyoming to Brit. Columbia, and the eastern side 

 of the .--ierrt Nevada to Sau Bernardino Co.. California. 



Var. latisquamea, Gray, 1. c. Eather stout, white-tomentose or partly glabrate : 

 heads numerous in the corymbiform cymes: bracts of the glabrous involucre m.i-tly ellip- 

 tical-oblong, verv obtuse : lobes or teeth of the coroUa short, somewhat lanceolate, the tube 

 irlabr. us. — ,-!;. E. Colorado to adjacent Xew Mexico, and S. Utah, Findler- (no. 341), D:gelow, 

 Dr. Henry \VariJ. 



Var. hololeuca, Gray, 1. c. slender, white-tomentose even to the heads ; these 

 rather small, numere us in corymbiform cymes terminating sparsely-leaved branches : leaves 

 very narrowly linear, inch long, and uppermost short and bract-like : involucral bracts small, 

 linear-oblong, verv obtuse : corolla merely 5-toothed, its tube bearing cobwebby hairs : 

 akenes (as in the species) viUous-pul lesceut. — Owens Valley in the southeastern part of the 

 Sierra Nevada, California. I>r. Horn. 



B. leiosperma. A foot or two high, with rigid slender branches, bearing small glomerate 

 cvme-. white-tomentose, or in age somewhat glabrate ; leaves sparse, and uppermost very 

 small, iuvolnte-filiform : involucre glabrous; its bracts small, obLaig. or innermost linear- 

 oblong, very obtuse : corolla glabrous and with 5 short ovate teeth : ovary and akene? com- 

 pletely glal'rous : — ^r. George. Southern Utah, Palmer, coU. 1S75. Candelaria, S. W. Nevada, 

 W. H.>'..''ld(y. 



Green, no tomentum, either smooth and glabrous or scabro-puberulous: style-branches less 



ex,serted. thicker, shorter than the stigmatic portion: pappus rigidulous: akenes shorter. 



B Douglasii, Gray, 1. c. From 6 inches to 6 feet high, fastigiately branched, seimetimes 

 resinous-viscid', often slightly or not at all so leaves from very narrowly linear or alm.st 



