Bigelovia. COMPOSIT.'E. 139 



■H- ++ -H- -!-i- Leaves numerous, from filiform-linear or involute-filiform (but mostly plane or onlv 

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

 heads fastigiate-cymose or somewhat thyrsoid: bracts of the involucre obtuse or somewhat acute 

 and muticous (in one ambiguous form even pointed!): slender style-appendages well exserttd, 

 especialh' in the first species. 



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

 tum: subutate-liliform style-ai)pendages longer than the stigmatic portion: pappus soft. 



B. graveolens, Gray. A foot to a yard or more high, bearing numerous crowded heads : 

 these half or two-thirds inch high : leaves mostly flocculcut-tomentose when young, often 

 glabrate in age, not rigid; the larger spatulate-liuear, or linear-lanceolate (2 inches loug and 

 fully 2 lines wide, obscurely if at all 3-nerved) ; the narrowest almost filiform, at least when 

 dry, and margins involute : involucre tliiu-chartaceous when dry : corolla-lobes or teeth 

 short, from lanceolate to nearly ovate : akenes linear : pappus soft. — Proc. Am. Acad, 

 viii. 644. — The typical form of this polymorphous species has the bracts of sometimes vis- 

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

 quite acute : short corolla-lobes commonly obloug-lauceolate, varying to uearly ovate and 

 shorter, the tube naked or uearly so. — C/trijsocoma diannini/oides, Pursh, Fl. ii. 517, not Lam. 

 C. graveolens, Nutt. Gen. ii. 13G. Biijelovia drncunculoides, DC. Prodr. v. 329. Chrijsnthamnus 

 diacwicuioides & C. speciosiis, Nutt. Trans. Am. Phil. Soc. 1. c. Liiiosi/ris r/ravcolens, Torr. & 

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

 south to S. California and New Mexico. Heads sometimes cymosc, sometimes thyrsoid- 

 glomerate. Forms of the latter occur w-itli firmer involucral bracts, some of them even 

 acuminate, as if connected with B. Howard!. 



Var. glabrata, Gr.'^.y, 1. c. Includes forms of the above with the usually narrow 

 leaves early glabrate or perhaps glabrous from the first, sometimes balsamic, sometimes not. 

 — Includes Linosyris viscidi flora, Hook. Lond. Jour. Bot. vi. 243, iu part, no. 102, Geijer, 

 from the northern Rocky Mountains, and Bifjdoria Dowjlasii, var. stcno])hijlla, Gray, Bot. 

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

 even the branches sometimes early lose their light tomentum. 



Var. albicaulis, Gray, 1. c. Branches for the most part permanently and very 

 densely white-tonientose and leaves floccose-tomentose : involucre either tomeutulose or gla- 

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

 lous- or arachnoid-pubescent. — Chrijsocoma nauseosa, Pursh, 1. c, Nutt. Gen. 1. c., therefore 

 Bitielovia A/issouriensis, DC. 1. c, but chiefly found west of the Rocky Mountains. Chrijuo- 

 thamnus speciosus, var. albicaidis, Nutt. Trans. Am. Phil. Soc. 1. c. Liiiosjp-is albicaulis, Torr. 

 & (Jray, Fl. ii. 234. — Rocky Mountains of Wyoming to Brit. Cohtmliia, and the eastern side 

 of the Sierra Nevada to San Bernardino Co., California. 



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

 heads numerous in the corymbiform cymes : bracts of the glabrous involucre mostly ellip- 

 tical-oblong, very obtuse : lobes or teeth of the corolla short, somew-hat lanceolate, the tube 

 glabrous. — S. E. Colorado to adjaceut New Me.xico, and S. Utah, Fendler (no. 341 ), BigeJoir, 

 Dr. Ilenrji Ward. 



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

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

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

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

 akenes (as in the species) villous-pubescent. — Owens Valley in the southeastern part of the 

 Sierra Nevada, California, Dr. Horn. 

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

 cymes, white-tomentose, or in age somewhat glabrate : leaves sparse, and uppermost very 

 small, involute-filiform : involucre glabrous ; its bracts small, oblong, or innermost linear- 

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

 jjletelv glabrous ! — St. George, Southern Utah, Palmer, coll, 1875. Camlelaria, S. W. Nevada, 



W. II. Shocklr,j. 



= = Green, no tomentum, cither ."smooth and glabrous or scabro-pnberulous: style-branches less 

 exsertcd, thicker, shorter than the stignuUic portion; pappus rigidulous: akenes shorter. 

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

 resinous-viscid, often slightly or not at all so leaves from very narrowly linear or almost 



