Birjelovia. COMPOSITE. 139 



-H- ++ ++ -H- Leaves numerons, from filiform-linear or involute-filiform (but mostly plane or only 

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

 heads fastigiate-cymose or somewhat tiij'r.soid: bracts of the involucre obtuse or somewhat acute 

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

 especiallj' in the first species. 



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

 tum : subutate-liliform style-appendages longer than the stigmatic portion : pappus soft. 



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

 these half or two-thirds inch high : leaves mostly flocculent-tomeutose when young, often 

 glabrate in age, uot rigid; the larger spatulate-Iinear, or linear-lanceolate (2 inches long and 

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

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

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

 viii. 644. — The tj'pical 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 oblong-lanceolate, varying to nearly ovate and 

 shorter, the tube naked or nearly so. — Chnjsocomu drar.unculoides, Pursh, PI. ii. b\l , uot Lam. 

 C graveolens, Nutt. Gen. ii. 136. Bigelovia dracuncidoides, DC. Prodr. v. 329. Chrijsothamnus 

 dracuncuioide.s & C. speclosus, Nutt. Trans. Am. Phil. Soc. 1. c. Linosyris r/ravcoleiis, Torr. & 

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

 south to S. California and New 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. Howard!. 



Var. glabrata, Gray, 1. c. Includes forms of the above with the usually narrow 

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

 — lucludes Linosyris viscidijlora, Hook. Loud. Jour. Bot. vi. 243, iu part, no. 102, Geijer, 

 from the northern Rocky Mountains, and Bigeloria Dowjlasii, var. steiiophylla, Gray, Bot. 

 Calif, i. 614, from the southern borders of C'aliforuia, Palmer. Not rare iu Colorado, where 

 even the branches sometimes early lose their light tomeutum. 



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

 densely 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. — CItrysocoma iiauseosa, Pursli, 1. c, Nutt. Gen. 1. c, therefore 

 Biyelovia Missouriensis, DC. 1. c, but chiefly found west of the Rocky Mountains. Cliryso- 

 thainnus speciosus, var. albicaulis, Nutt. Trans. Am. Phil. Soc. 1. c. Linosyris alhicuxdis, Torr. 

 & Gray, Fl. ii. 234. — Rocky Mountains of Wyoming to Brit. Columbia, 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 iu the corymbiform cymes : bracts of the glabrous involucre mostly ellip- 

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

 glabrous. — S. E. Colorado to adjacent New Mexico, and S. Utah, Fendler (no. 341), Biyelow, 

 Dr. Henry ]V(rrd. 



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-pubesceut. — Owens Valley in the southeastern part of the 

 Sierra Nevada, California, Dr. LLorn. 

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

 cymes, white-tomentose, or iu 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- 

 pletelv glabrous ! — St. George, Southern Utah, Palmer, coll. 187.5. Caudelaria, S. W. Nevada, 

 W. IL ShocHey. 



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

 exserted, thicker, shorter than the stigmatic 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 



