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 Prarie FatsE 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. 
Fic. 292. — False BROAD-LEAVED GUM PLANT 
Boneset (Kuhnia eu- 
patorioides). X }. Grindélia squarrésa, 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 Pharmacopeeia, and, 
if collected when the flowers are just coming into full bloom and 
