420 



COMPOSITAE (COMPOSITE FAMILY) 



pappus of numerous long and very plumy 

 hairs, yellowish to nearly white. (Fig. 292.) 

 A near relative of the preceding plant, 

 the PRAIRIE FALSE BONESET (Kuhnia gluti- 

 nosa, Ell.) ranges from Illinois to the Dakotas 

 and southward to Alabama and Texas. It 

 is similar in habit and in season of bloom and 

 fruitage, but is taller and stouter, more hairy, 

 and has foliage somewhat viscid or sticky as 

 well as resinous. Its pappus plumes are 

 tawny brown. 



Means of control 



Prevent seed formation by cutting when 

 in first bloom. Cultivation of the soil will 

 kill the perennial roots, but, where that is 

 not desirable, frequent hoe-cutting and salt- 

 ing will starve them. Or the plants may be 

 hand-pulled when the ground is soft, the 

 single taproot making the process easy. 



FIG. 292. False 

 Boneset (Kuhnia eu- 

 patorioides) . X j. 



BROAD-LEAVED GUM PLANT 



Grindelia squarrbsa, Dunal 



Other English names: Gumweed, Scaly Grindelia. 



Native. Perennial. Propagates by seeds. 



Time of bloom : June to September. 



Seed-time: July to October. 



Range : Illinois and Minnesota to the Saskatchewan, southward to 



Texas and Mexico, and westward to California. 

 Habitat: Meadows, grain fields, waste places, and roadsides. 



This weed was formerly common only on the western prairies, 

 but unrestricted exchange of commercial seeds has carried it into 

 many of the Eastern States as an impurity of grass seeds and 

 grain. It is very persistent when established in meadow lands 

 and is a serious injury to the crop. The leaves and flowering tops 

 of the weed are official in the United States Pharmacopoeia, and, 

 if collected when the flowers are just coming into full bloom and 



