Artemisia. COMPOSITE. 373 



Var. Tilesii, Ledeh. Robnst, leafy to the very summit : heads glomerate, fuscous : 

 iuvolutre liroadly campauulate, araclmoid-cottony when youug, but ghibrate, many-flowered : 

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

 A. TiUsii, Ledeb. Mem. Acad. Tetrop. v. 568; Bess. Abrot. 70; Less, in Linn. vi. 214; DC. 

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



Var. Californica, Bess. Less branched or simi)le-stemmed, with more naked pani- 

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

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

 i. 404. A. heterophylla, Nutt. Trans. Am. Phil. Soc. vii. 400. A. Tilesii, var. elutior, Torr. 

 & Gray, Fl. ii. 422. — Northern liocky Mountains to Alaska, south to the coast of California 

 aud in the Sierra Nevada. 



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

 obscurely ciuereous-puberulent : stem rather stout, 2 or 3 feet higii : leaves comparatively 

 ample, green above, pale and barely cinereous beneath ; lower bipinnately and upper simjjly 

 piunately 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: involucre greenish, glabrous, low-hemispherical, 30-40-flowered. — Bull. Torr. Club, 

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

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

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



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

 or glabrate except the lower face of the leaves : these white with close cottony tomentum 

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

 sparingly laciniate divisions and lol)es : heads glomerate in an interrupted spiciform or vir- 

 gate panicle, 1 or 2 lines high : involucre hemispherical-campanulate, greenish 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. Ludoviciaiia & A. 

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

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



Var. incompta. A stouter form, with coanser and less dissected leaves, having 

 mostly broader (sometimes short-oblong) lobes, or the upper entire. — A. 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 siiffrutescent at base: leaves or tlieir divisions 

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



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

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

 (these 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 sjiaringly pubescent or glabrate, pale fuscous. — Abrot. 35, & 

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

 a dwarf state. — Sandy banks of the Columliia River and its trilnitaries, Idaho, Oregon, and 

 Washington Terr., Douglas, Nuttall, 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 white-tomentose, 10 to 20 inches high, very leafy up to the strict virgatc panicle : 

 leaves pinnately 5-7-parted into very narrow linear and b}' revolution filiform entire divis- 

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

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

 (no. 1279, PI. Wright, ii. 98, mention only). Painter, Greene, Rotlirock (no. 539), Brandegee. 



== = = = Pinnately parted leaves mostly attenuate-filiform : heads siniplj' and loosely race- 

 mose-spicate. 



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

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

 tonientose beneath ; most of the cauline pinnately parted into 5 to 7 delicate filiform divis- 

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

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



