﻿inner scales ot the involucre with brownish scanous margins ; ray-flowers 

 n"'*f h 3 [''jj^'^^y^^^^^' on^the inside, with the rounded ligule slightly 

 toothed.— iVM<^ / gen.2.p.Ul, in trans"^Amer.^phil. loc!^Fc^%^. AOl. 

 T. 7 camphoratum, Less, in Linntea, 6 p. 521. T. Douglasii, DC. ! prodr. 

 6. p. 128. T. boreale. of the EnsUsh gardens ; Nutt. in trans. Amtr. phil. 

 soc. I. c. Onialanthus camphoratus, Less. syn. p. 260 ; Hook. ! fi. Bor.- 

 Am. 1. p. 321. Omalotes camphorata, DC. prodr. 6. p. 83. 



Shores of Lakes Huron and Superior ! north to York Factory on Hudson's 

 Bay! and west to Oregon! and California !- If A stout plant, 1-3 feet 

 Jonvexinfi'''-f ^ much ^larger than ^those of T. vulgare ; the disk strongly 



§ 3. Heads (obovoid) heterogamous ; the ray-flowers (about 5) truncate, 2-3- 

 toothed ; the disk-flowers b-toothed; the central apparently infertile.— 



3. r.ca;7ito<um;caespitose,sufrr 

 1 a branched caudex, cuneiform, ; 



^utt. ! in trans. Amer.phil. soc. {n. ser.) 7. p. 402. 

 Rocky Mountains, on a hiah hill, near the Red Butes of the Platte, towj 

 s northern sources on the Sweet Water, NuUall ! _ June.— Plant gvov 



uster of heads. CoroUa, especially of the^ exterior flowers!^ beconfing 

 irged and indurated at the base.— Odor agreeable, like that of Chammon 



•rm, obtusely 3-lobed or toothed a? the apex ;The lower crowded on 

 ranches of the woody caudex ; the upper scattered on the flowering ste 



; pappus very minute, in the disk-flowerg obsolete. — Sphaerom 



Rocky' Mountains," near the sources of the Platte and Colorado of 

 l^st, Nuttall.' July.— Shrub 4-5 inches high. Leaves half an inch L 

 ' lowers bright yellow. 



notofia^''' ■'""'^ 

 -iween lat. 5i° and 64°, Richardson.— A foot high. 



Hook. fl. 



156. ARTEMISIA. Linn.; Besser; DC. prodr. 6. p. 93. 



Heads discoid, few-many-flowered, heterogamous, with the central flowers 



3nd the marginal pistillate in a single series, with a tubular 3-toothed corolla ; 

 or sometimes homogamous, with the flowers all perfect. Scales of the in- 

 volucre imbricated, mostly dry and with scarious margins. Receptacle 



