Artemisia. COMPOSITE. 373 



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

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

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

 .1. Tilesii, Ledeb. Mem. Acad. Petrop. v. 568; Bess. Abrot. 70; Less, iu Liuu. 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 at maturity sometimes oblong, glabrate. Bess, in 

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

 i. 404. A. liderophylla, Nutt. Trans. Am. Phil. Soc. vii. 400. A. Tilesii, var. cliitinr, 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. i-ulgaris, glabrous throughout, or minutely and 

 obscurely ciuereous-pubcruleiit : stem rather stout, 2 or 3 feet high : leaves comparatively 

 ample, green above, pale and barely ciuereous beneath ; lower bipiunately and upper simply 

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

 numerous, loosely racemose on the brandies 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 alignescent slender caudex, glabrous 

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

 (which is rarely deciduous), 1-2-pinnately parted into narrow liuear 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-rlowered. Dougl. iu herb. Hook.; Bess. Suppl. & 

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

 Michauziana, Bess. Abrot. 38, 71, & iu 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 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. Lilldleyana, 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 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. Liudl. 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, Nuttull, Hall (distrib. as A. discolor?), Brandeyee. Also on the 

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



A. "Wriglltii, 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 pinnatelv 5-7-parted into very narrow liuear 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, PL Wright, ii. 98, mention only), Palmer, Greene, Rothrork (no. 539), Brandegee. 



= == = = Pinnately parted leaves mostly attenuate-filiform : heads 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 . lower 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 15-flowered. Abrot. 

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



