50 



GENUS ARTEMISIA. 



Lvs,3-6cm,long, Lvs.i-3 cm. long, 

 lobes slender,as- lobes short, 

 cending; petiole spreading; petio 

 naked \ auricled at base 



Principal Ivs.zorj Principal Iv3. mostly 

 times pmnat.fid. ..pi^natifid. Native 

 Introduced species 



Shrubs; achenes broad 



and truncate at summit, 



sharply angled; ray- f Is. 5-20. 



Lvs. dissected, mostly into filiform lobes 



Herbs;acbene3 

 narrowed above 

 to a small epigyn- 

 ous disk, not ang- 

 led; ray-fls. 4-15 

 (or more) 



Shrub ;achenes narrowed 

 above, not angled; reduc- 

 tion in ray-fls. to a, 2, on; 

 Iv3. 3-dentate. Connecting 

 with section Seriphid/um. 



Flo. 4. — Phylogenetio chart of the species of Artemisia section AhroUxnum. 



