462 



COMPOSITAE. 



[Vol.. III. 



I. Artemisia caudata Michx. Tall or Wild 

 Wormwood. (Fig. 399S.J 



Ailemisia caudata Miclix. Fl. Bor. Am. 2. 129. 1S03. 



Root biennial 1 sometimes perennial? 1; stems slender, 

 glabrous, tnfted, strict, very leafy, 2°-6° hiyh.at length 

 paniculately branched, the branches glabrous, or rarely 

 slightly pubescent, nearlj- erect. I^ower and basal 

 leaves and those of sterile shoots slender-petioled, 

 sometimes a little pubescent, 3'-6' long, 2-3-pinDately 

 divided into narrowly linear acute lobes about Yz" 

 wide; upper leaves sessile or nearly so, pinnately di- 

 vided, or the uppermost entire and short; heads about 

 \" broad, very short-peduncled, very numerous in a 

 large somewhat leafy panicle, mostly nodding; bracts- 

 of the ovoid-campauulate involucre ovate, or the inner 

 elliptic, glabrous; receptacle hemispheric, naked; 

 central flowers sterile. 



In dry sandy soil, abundant on sea-beaches, from Quebec 

 to Florida, west to Manitoba, Nebraska and Texas. Julv- 

 Sept. 



2. Artemisia borealis Pall. Northern 

 Wormwood. (Fig. 3999.) 



Artemisia borealis Pall. Iter. 129. pi. Iih, f. i. 1771. 

 Artemisia Groenlandica Wormsk. Fl. Dan. pi. /sSj. 

 1S18. 



Perennial, 5'-i5' high, densely silky-pubescent 

 all over, resembling small forms of the following 

 species. Leaves less divided, the basal and lower 

 ones petioled, i'-2yi' long, the upper sessile, lin- 

 ear and entire or merely 3-parted; heads about 2" 

 broad in a dense terminal rarely branched thyrsus; 

 involucre nearly hemispheric, its bracts brown or 

 brownish, pilose-pubescent or nearly glabrous; re- 

 ceptacle convex, naked; disk- flowers sterile. 



Maine (according to Fernald); Quebec to Greenland, 

 west through arctic America to .Vlaska, south in the 

 Rocky Mountains to Colorado. Also in northern .\sia. 

 July-Aug. 



3. Artemisia Canadensis Michx. Canada 

 Wormwood. (Fig. 4000. ) 



Artemisia Canadensis Michx. Fl. Bor. .■^m. 2: 129. 1S03. 



Root perennial (or sometimes biennial); stem pubes- 

 cent or glabrous, strict, simple or branched, i°-2° high, 

 the branches appressed aud erect. Leaves usually pubes- 

 cent, but sometimes sparingly so, the basal and lower 

 ones petioled, 2'-3' long, 2-pinnately divided into linear 

 acute lobes which are shorter and broader than those of 

 A/iemisia caiidala ; upper leaves sessile, less divided; 

 heads short-peduncled, about 2" broad, commonlj- num- 

 erous in a narrow virgate panicle, mostly spreading or 

 erect, in small forms the panicle reduced to a nearlj' 

 or quite simple terminal raceme; involucre ovoid, its 

 bracts ovate or oval, green, glabrous or pubescent; re- 

 ceptacle hemispheric; central flowers sterile. 



In rocky soil, Hudson Bay to northern Maine and Ver- 

 mont, west along the Great Lakes to Minnesota and Mani- 

 toba and to the Canadian Pacific coast, south in the Rocky 



Mountains to Arizona, and to Nebraska. 

 Wild Wormwood. July-Aug. 



Called also Sea or 



