COMPOSITAE (COMPOSITE FAMILY) 421 



quickly dried, are worth in the drug market five to ten cents a 

 pound. 



Stem and branches somewhat reddish, smooth, erect, freely 

 branching, ten inches to two feet high. 

 Leaves alternate, oblong or the lower 

 ones spatulate, blunt-pointed, sessile, 

 more or less clasping at the base, 

 spinescently toothed. Heads terminal, 

 solitary, about an inch broad, resinously 

 viscid ; bracts of the involucre imbri- 

 cated in several rows, awl-tipped, green, 

 spreading, and recurved; the outer 

 row of strap-shaped or ray florets are 

 pistillate and fertile, disk florets per- 

 fect. Achenes light-colored, short,thick, 

 slightly flattened and curved, obscurely 

 four-sided, marked with lengthwise lines 

 or ribs ; pappus consists of two or 

 three barbed awns. (Fig. 293.) 



Means of control 



Sow clean seed. Prevent reproduction 

 by cutting before any seed has ripened. 

 Where the infestation is new and areas 

 are small, grubbing out or hand-pulling 



of the perennial roots is well worth the 



ii . T , . . i /. i i FIG. 293. Broad-leaved 



labor; but rankly infested fields re- Gum-plant (Grindelia syuar- 



quire to be put under cultivation. rosa). x \. 



NARROW-LEAVED GUM PLANT 



Grindklia lanceolata, Nutt. 



Native. Perennial. Propagates by seeds. 



Time of bloom: July to August. 



Seed-time : August to September. 



Range: Tennessee, Missouri, and Kansas, southward to Louisiana 



and Texas. 

 Habitat: Meadows, fields, and waste places. 



