496 COMPOSITAE (COMPOSITE FAMILY) 



florets usually all tubular or sometimes with an outer row of 

 imperfectly developed rays ; these are pistillate, the central florets 

 perfect, all fertile. Achenes angled or ribbed, with a five-toothed 

 crown for pappus. 



Means of control 



Small areas may be grubbed out, or killed with Caustic soda or 

 hot brine. Or the roots may be starved by successive close cut- 

 ting throughout the growing season. 



COMMON MUGWORT 

 Artemisia vulgaris, L. 



Other English names: Felon-herb, Sailor's 



Tobacco. 



Introduced. Perennial. Propagates by seeds. 

 Time of bloom: July to October. 

 Seed-time: August to November. 

 Range : Nova Scotia to Ontario and Michigan, 



southward to New Jersey and Tennessee. 

 Habitat: Roadsides and waste places; along 



streams and ditches. 



Also called Wormwood, and kept on sale 

 under that name in drug stores. Stem one 

 to three feet tall, smooth or nearly so except 

 the growing branches, which are finely w r hite- 

 woolly. Leaves alternate, one to four inches 

 long, deeply pinnatifid into narrow oblong or 

 spatulate segments, which are again cut and 

 toothed, the lower ones usually petioled, the 

 upper ones sessile, often with lobes entire; 

 all are smooth and dark green above but 

 covered with fine, white wool beneath. The 

 numerous heads are in spiked panicles, held 

 nearly erect; each head is about one-sixth 

 of an inch broad and only the central florets 



are fertile ; bracts of the involucre dry and 

 FIG. 345. Com- . . , . , 



mon Mugwort (Arte- scanous. Achenes very small, obovoid, with- 

 misia vulgaris). X i. out pappus. (Fig. 345.) 



