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 
labor; but rankly infested fields re- 
quire to be put under cultivation. 
Fig. 293. — Broad-leaved 
Gum-plant (Grindelia squar- 
rosa). Xi. 
NARROW-LEAVED GUM PLANT 
Grindélia 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. 
