Artemisia. COMPOSITE. 373 



Var. Tilesii, Ledeb. Robust, leafy to the very summit : heads glomerate, fuscous : 

 iuvolucre Ijroadly campanulate, arachnoid-cottony wiieu young, but glabrate, many-flowered : 

 leaves coarsely cleft and laciniate, tiie lobes lanceolate, attenuate-acute. — Fl. Ross. ii. 586. 

 ^1. Tilesii, Ledeb. Mem. Acad. Tetrop. v. 5GS ; Bess. Abrot. 70; Less, iu Linn. vi. 214; DC. 

 1. c. ; Torr. & (iray, 1. c. — Arctic coast to Unalaska. (Adj. E. Asia.) 



Var. Californica, Bess. Less branched or simple-stemmed, with more naked pani- 

 cle : heads of var. Tilesii or smaller, or at inaturity sometimes oblong, glabrate. — Bess, in 

 Linn. xv. 91 (founded on A. inteyrifolia. Less.); Torr. & Gray, 1. c. ; Gray, Bot. Calif, 

 i. 40-1:. A. heterophi/lla, Nutt. Trans. Am. Phil. Soc. vii. 400. A. Tilesii, var. clatior, Torr. 

 «&, Gray, Fl. ii. 422. — Northern Rocky Mouutaius to Alaska, south to the coast of California 

 and in tlie Sierra Nevada. 

 A. franserioides, Gueexe. Habit of A. vulgaris, glabrous throughout, or minutely and 

 obscurely cinereous-puberulent : stem ratlier stout, 2 or 3 feet high : leaves comparatively 

 ample, gi'een above, pale and barely cinereous beneath ; lower bii)innatcly and upper simply 

 pinuately parted into lanceolate-oblong obtuse entire or 2-3-cleft divisions and lobes : heads 

 numerous, loosely racemose on the branches of the leafy elongated panicle, 2 or 3 lines 

 broad: iuvolucre greeui.sh, glabrous, low-hemispherical, .30-40-flowered. — Bull. Torr. Club, 

 X. 42. A. discolor, Torr. & Gray in Pacif. R. Rep. ii. 126; Rothrock in Wheeler Rep. vi. 

 176, not Dougl. — Roubideau's Pass, Mountains of S. Colorado, Gunnison. Pinos Altos 

 Mountains, New Mexico, Greene. Mount Graham, Arizona, RvtIirocJc. 

 A. discolor, Dougl. A foot high, mostly slender, from alignescent slender caudex, glabrous 

 or glabrate except the lower face of the leaves : these wjiite with clo.se cottony tomeutum 

 (Avliich is rarely deciduous), 1-2-pinnately parted into narrow linear or lanceolate entire or 

 sparingly laciniate divisions and loljcs : heads glomerate in an interrupted spiciform or vir- 

 gato panicle, 1 or 2 lines high : involucre hemispherical-canipauulate, greenisli and scarious, 

 glabrous or soon becoming so, 20-30-flowered. — Dougl. in herb. Hook. ; Bess. Suppl. & 

 DC. Prodr. vi. 109; Torr. & Gray, 1. c. ; Gray, Bot. Calif, i. 404. A.-Ludovidana & A. 

 Mic/iauxiana, Bess. Abrot. 38, 71, & in Hook. Fl. 1. c., not Nutt. — Mountains of Brit. 

 Columbia and Montana to Utah, Nevada, and the Sierra Nevada iu California. 



Vai'. incompta. A stouter form, with coarser and less dis.sected leaves, having 

 mostly broader (sometimes short-oblong) lobes, or the upper entire. — ^-1. incompta, Nutt. 

 Trans. Am. Phil. Soc. vii. 400. — Rocky Mountains from Montana and Wyoming to Wash- 

 ington Terr., Nevada, and the Sierra Nevada in California. 



= = = Not tall, .sometimes low, herbaceous or suffrutescent at base: leaves or their divisions 

 narrowly linear, simple, small : heads 15-20-flowered, in a narrow thj-rsoid or spiciform panicle. 



A. Liindleyana, Bess. A foot or two, rarely only a span high, slender, with thin floccu- 

 lent tomeutum soon deciduous, or persisting on the lower face of tlie mostly entire leaves 

 (the.se inch or less long, a line or much less wide, the lower occasionally with 2 or 3 small 

 lobes) : heads barely 2 lines high, loosely spicate on the simple stem or paniculate branches 

 of the inflorescence : involucre sparingly pubescent or glabrate, pale fuscous. — Abrot. 35, & 

 in Hook. 1. c, described from herb. Lindl. A. pnmila, Nutt. Trans. Am. Pliil. Soc. 1. c. 399, 

 a dwarf state. — Sandy banks of the Columbia River and its tributaries, Idaho, Oregon, and 

 AVashington Terr., Douglas, Nnttall, Hall (distrib. as A. discolor ?), Brandegee. Also on the 

 sands of the sea-shore near the Straits of Juan de Fuca, Douglas. 



A. ^Vrightii, Gray. Cinereous or canescent with minute pubescence, or radical shoots 

 sometimes wjiite-tomentose, 10 to 20 inches liigh, very leafy up to the strict virgate panicle : 

 leaves pinuately 5-7-parted into very narrow linear and by revolution filiforni entire divis- 

 ions : heads numerous and crowded : involucre minutely cinereous-canescent, glabrate in 

 age. — Proc. Am. Acad. xix. 48. — Plains of S. Colorado and adjacent New Mexico, WriglU 

 (no. 1279, PI. Wright, ii. 98, mention only). Palmer, Greene, Rothrock (no. 539), Brandegee. 



= == == = Plnnately i)arted leaves mostly attenuate-filiform : Iieads simply' and loosely race- 



mose-spicate. 



A. Prescottiana, Bess. Much branched from the base, a foot or two high, slender, gla- 

 brous or early glabrate . lovver leaves cuneate-linear and incised or cleft at apex, slightly 

 tomentose beneath; most of the caulinc pinuately ])arted into 5 to 7 delicate filiform divis- 

 ions (of an inch or less long) : involucre glabrous, hemispherical, about 15-flowcred. — Abrot. 

 72, & in Hook. 1. c. — " Quicksand River, near the Grand Rapids of the Columbia," Douglas. 



