﻿418 COMPOSITE. Artemisia. 



filiform; the lower mostly 3-parted; heads very small, crowded in virgate 

 leafy panicles, tomentose, 3-4-flowered ; two of the flowers pistillate andVer- 



Torr. I'^in^Zl^tj'rNeJY^rC^^^ 21 1 ?'^^A.'' Pliltensfs?'5vw inTaZ. 

 Amer. phil. soc. {n. ser.) 7. p. 397. 



' " ' ^' - ' . Dr. James ! Nuttall ! Lieut. Fre- 



becoming somewhat glabrous when old ^' ^^'^ ^^^""^^'^ '^^"^^ 



§ 2. Receptacle naked : heads homogamous ; the flowers all perfect and fer- 



out; leaves linear-lanceolate, ^acute, flat, entire (the lowermost cuneifom 

 and sometimes acutely 3-lobed), equally clothed with the close silky toraen- 



glomerate or spicate-paniculate, 4-6-flowered; exlerior scales of the involucre 



DC. prodr. 6. p. 105. A. Columbiensis, ' Nutt. ! "gen. 2. p. 142, if in trans. 

 Amer. phil. soc. (n, ser.) 7. p. 398, excluding the habitat in part. 



Plains of the Upper Missouri and Platte to the Rocky Mountains, ims.' 

 mittall! Mr. Nicollet! Lieut. Fremont! and plains of the Saskatchawan, 



specimens, collected by^Lewi'^^'^'^m bdSve^it^S^ n^ bee^^^^ west of 

 the Rocky Mountains; and Mr. Nuttall was mistaken in supposing it to be 

 the "Wild Sage" of Lewis and Clarke's Travels, which so abounds in the 

 woodless sterile plains of the interior of Oregon ; so that the change of specific 

 name was the more unwarrantable. The name of Wild Sage was doubtless 

 applied indiscriminately to several of the ensuing shrubby species, which in- 

 habit the region in^question. But the plant given to Pursh by Lewis with 



collected on the bluffs of ^he Missouri, Oct. 1, 1804, upon the homeward 

 tridentata^ C^u^t.) : shrubby, much branched, densely ^^J^^^T^^'^^^^^ 



^ded or fascicled, narrowly cuneiform, 3-toothed 

 apex, the teeth or short lobes obtuse and approximate ; those of thi 



n.M».= .A.„ ^ spicate-glomerate, disposeu 



jrior scales of the involucre 



! compound panicles, 5-6-flowered; exterior scafes of t" ' ' 

 It, the inner scarious. — Nutt.! in trans. Amer. vhil. so 



p. 398. ( 



the Oregon and Lewis River (Rocky Mountains in herb.), Nutt- 

 all! Wind River Chain of the Rocky Mountains, Lieut. Fremont! Aug.-- 

 Shrub about^a foot high, much branched. Leaves an inch or less^in length, 



Jomentoseyhe^teeth or fobes eiiher^verj shOTt^or'2^^ Hneslong! seldom again 

 leaves ^''^"^'^^J {'iixm.\^ \. c): dwarf shrubby, <"mentose-canesce^n^t^ 

 2-3-lobed ; heads globose-ovoid] 6-lO-flowered, sessile, solitary or somewhat 

 clustered, forming a slender interrupted spike or spicate panicle; scales ot 

 the involucre oval ; the exterior tomentose, the inner scarious. 

 _ Arid plains of Lewis River, NutLall .'—Shrub 4-^ inches high ; the flower- 

 ing branches virgate and rather naked. 



