i i iMl'OSITAE. 



Vol 111. 



15. Artemisia kansana Britton. Kansas Mug- 

 wort. Fig. 4585. 



?A. Carruthii A. Wood, Trans. Kans. Acad. Sci. 5: 51. 



[876. 

 A. kansana Britton, in H r i 1 1 . tV Brown, 111. Fl. 3 : 466. 1898. 



Densely white-woolly all over; stem erect, much 

 branched, the branches strict, bearing very numerous 

 small heads forming a narrow dense panicle. Leaves 

 numerous, crowded, the lower pinnatcly divided into 

 3-7 narrowly linear revolute-margincd segments \" 

 wide or less, greenish above ; upper leaves mostly nar- 

 rowly linear and entire ; heads oblong-oval, sessile, or 

 very short-peduncled, erect, or somewhat spreading, 

 li" long; involucre very woolly, its bracts ovate-lan- 

 ceolate to oblong-lanceolate, acute ; receptacle naked. 



Plains, Kansas to Colorado and New Mexico. Intro- 

 duced in Missouri. July-Sent. 



16. Artemisia serrata Nutt. Saw-leaf 

 Mugwort. Fig. 4586. 



Artemisia serra'a Nutt. Gen. 2: 142. 1818. 



Perennial ; stem stout, tomentose or be- 

 coming glabrous, much branched. 5-io high. 

 Leaves lanceolate, 2-6' long. 3"-l2" wide, 

 densely white-tomentose beneath, dark green 

 and glabrous above, acuminate at the apex. 

 narrowed to a sessile base, or the lowest peti- 

 oled, sharply serrate or incised, or the upper 

 entire ; heads very numerous, greenish, erect, 

 about 1 J" broad, sessile or short-peduncled 

 in panicled spikes or racemes ; involucre ca- 

 nescent. its bracts oblong, or the outer ones 

 lanceolate; receptacle naked; central flowers 

 fertile. 



Prairies. Illinois to Minnesota and Dakota. 

 Introduced on the Mohawk River, near Sche- 

 nectady, N. Y. Aug.-Oct. 



17. Artemisia longifolia Nutt. Long- 

 leaved Mugwort. Fig. 4587. 



Artemisia longifolia Nutt. Gen. 2: 142. 1818. 



Perennial ; stem densely white-tomentose, 

 branched, 2-5 high. Leaves linear or linear- 

 lanceolate, elongated, entire, 2-5' long, l"-5" 

 wide, acuminate, tapering to a sessile base, or 

 the lower petioled, densely white-tomentose 

 on both sides, or becoming green and glabrate 

 above ; heads numerous, erect, spicate-panicu- 

 late. about 2" broad ; involucre tomentose. its 

 bracts narrowly oblong; receptacle naked; 

 central flowers fertile. 



In dry rocky soil, western Nebraska to Minne- 

 sota, Idaho, Oregon and Saskatchewan. Aug.- 

 Sept. 



