Artemisia. COMPOSITE. 373 



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

 involucre broadly campanulate, arachnoid-cottony when youug, but glabrate, many-flowered : 

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

 A. Tilesii, Ledeb. Mem. Acad. Petrop. 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 simple-stemmed, with more naked pani- 

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

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

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

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

 and in the Sierra Nevada. 



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

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

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

 pinnately 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 ; Rothrock in Wheeler Rep. vi. 

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

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



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

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

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

 sparingly laciniate divisions and lobes : 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. Ludoviciana & A. 

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

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



Var. incompta. A stouter form, with coarser 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 suffrutescent at base : leaves or their 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 sparingly pubescent or glabrate, pale fuscous. — Abrot. 35, & 

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

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

 Washington Terr., Douglas, Nuttall, Hall (distrib. as A. discolor ?), Brandeyee. Also on the 

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



A. W rightii, Gray. Cinereous or canescent with minute pubescence, or radical shoots 

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

 leaves pinnately 5-7-parted into very narrow linear and by revolution filiform 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, Wright 

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



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



mose-spicate. 



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

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

 tomentose 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 1 5-flowered. — Abrot. 

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



