COMPOSITAE (COMPOSITE FAMILY) 485 



of the involucre lance-shaped, pointed, hairy on both sides, reflexed. 

 Achenes small, brown, top-shaped nutlets, hairy at the base and 

 crowned with a half-dozen or more bristly awns. (Fig. 336.) 



Means of control 



No composite flower, however beautiful, should be permitted 

 to give its seeds to the wind's will. In gardens the blossoms should 

 be clipped as they fade, and where the plants "blanket" the fields 

 they should feel the scythe or the mowing-machine blades at sight 

 of the first gay flower. For destruction of the perennial roots 

 the ground requires to be put under cultivation. 



FETID MARIGOLD 



Dyssbdia papposa, Hitchc. 

 (Boebera papposa, Rydb.) 



Other English names: Yellow Mayweed, False 

 Mayweed, Yellow Dog-fennel, Stinkweed. 



Native. Annual. Propagated by seeds. 



Time of bloom : July to October. 



Seed-lime: August to November. 



Range: Ontario and Ohio to Minnesota and Ne- 

 braska, southward to Texas, New Mexico, and 

 Arizona. 



Habitat : Fields, roadsides, and waste places. 



A vile weed, which is gaining ground in the 

 Eastern States, being established in several places 

 where it was brought in western hay, of which 

 the refuse was spread on the fields. 



Stem six to eighteen inches tall, erect, smooth, 

 dotted with pellucid glands, much branched, and 

 very leafy. Leaves but an inch or two long, 

 opposite, sessile, pinnately divided into narrow, 

 spatulate, toothed segments, and also dotted 

 with glands which exhale an offensive, fetid 

 odor. Heads numerous, terminal, on short pe- 

 duncles, dull yellow, but little more than a ., 



. , , ,. , a . . , Fetid Mangold 



quarter-inch broad ; disk florets perfect and (Dyssodia pap- 

 fertile; rays few and short, pistillate; involucre posd). x\. 



