~A80 COMPOSITAE (COMPOSITE FAMILY) 
Both ray and disk florets are fertile; bracts of the involucre in a 
single series, strongly keeled, and hairy... Disk achenes are oblong, 
wedge-shaped, and four-angled, those of the rays longer and curved. 
As soon as ripe they fall readily from the receptacle, and nearly 
matured plants should never be left on the ground when cut as the 
seeds ripen on the stalks. 
Means of control 
Prevent seed production by close and repeated cutting through- 
out the growing season. 
GALINSOGA 
Galinsdga parviflora, Cav. 
Introduced. Annual. -Propagates by seeds. 
5 Time of bloom: June to November. 
Seed-time: July to December. 
Range: Massachusetts to Oregon, south- 
ward to Georgia and Mexico. 
Habitat: Gardens, roadsides, and waste 
places. 
An immigrant from South America 
which has also crossed the ocean and 
been reported as troublesome in southern 
Europe. Stem one to two feet tall, 
pale green, slender, many-branched and 
spreading, sparsely clothed with ap- 
pressed hairs. Leaves opposite, ovate, 
thin, three-nerved, scallop-toothed, acute 
at apex, the lower ones narrowing to 
slender petioles, the upper ones sessile 
or nearly so. Heads, hardly a quarter- 
inch broad, solitary on short, slender 
peduncles, terminal and in the upper 
axils; rays white, very short, three- 
toothed, pistillate, fertile; disk-florets 
yellow, perfect, and fertile; bracts of 
Fig. 333.— Galinsoga (Ga- the involucre smooth, the outer row 
linsoga parviflora). X%. shorter. Achenes very small, dark, 
four-sided, wedge-shaped, finely hairy. (Fig. 333.) 
