462 



COMPOSITAE. 



[Vol. III. 



1. Artemisia caudata Michx. Tall or Wild 

 Wormwood. (Fig. 3998.) 



Artemisia caudata Michx. Fl. Bor. Am. 2: 129. 1803. 



Root biennial ( sometimes perennial?); stems slender, 

 glabrous, tufted, strict, very leafy, 2-6 high, at length 

 paniculately branched, the branches glabrous, or rarely 

 slightly pubescent, nearly erect. Lower and basal 

 leaves and those of sterile shoots slender-petioled, 

 sometimes a little pubescent, 3 / -6 / long, 2-3-pinnately 

 divided into narrowly linear acute lobes about %' r 

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

 vided, or the uppermost entire and short; heads about 

 i // broad, very short-peduncled, very numerous in a 

 large somewhat leafy panicle, mostly nodding; bracts 

 of the ovoid-campanulate 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. July- 

 Sept. 



2. Artemisia borealis Pall. Northern 

 Wormwood. (Fig. 3999.) 



Artemisia borealis Pall. Iter. 129. pi. hh, f. 1. 1771. 

 Artemisia Groenlandica Wormsk. Fl. Dan. pi. 1585. 



1818. 



Perennial, s'-is' high, densely silky-pubescent 

 all over, resembling small forms of the following 

 species. Leaves less divided, the basal and lower 

 ones petioled, i / -2^ / 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 Alaska, south in the 

 Rocky Mountains to Colorado. Also in northern Asia. 

 July-Aug. 



3. Artemisia Canadensis Michx. Canada 

 Wormwood. (Fig. 4000.) 



Artemisia Canadensis Michx. Fl. Bor. Am. 2: 129. 1S03. 



Root perennial (or sometimes biennial); stem pubes- 

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

 the branches appressed and 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 

 Artemisia caudata; upper leaves sessile, less divided; 

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

 erous in a narrow virgate panicle, mostly spreading or 

 erect, in small forms the panicle reduced to a nearly 

 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. Called also Sea or 

 Wild Wormwood. July-Aug. 



