472 COMPOSITAE (COMPOSITE FAMILY) 



der, naked peduncles often a foot in length ; disk florets 

 perfect, fertile, the five-lobed corollas purplish brown ; rays 

 six to ten, neutral, bright yellow, broadest at apex, and three- 

 lobed with the middle lobe notched. Involucre hemispheric, its ' 

 bracts in two rows, the outer ones narrower than the inner and 

 not so long. Achenes rounded oblong, broadly winged, crowned 

 with two short teeth. (Fig. 328.) 



Means of control 



Prevention of seeding by repeated cutting, which will also 

 finally starve the roots. Cultivation of the soil at once destroys 

 the weed. 



TALL TICKSEED 

 Coredpsis tripteris, L. 



Native. Perennial. Propagates by seeds. 



Time of bloom : July to October. 



Seed-time : August to November. 



Range: Pennsylvania to Wisconsin, southward to Florida and 



Louisiana. 

 Habitat: Meadows, fence rows, open woods, and thickets. 



A tall, graceful species, common in Southern and Western States 

 and sometimes cultivated and escaping in the East. Stem three to 

 eight feet high, round, smooth, slender, branching at the top. 

 Leaves opposite, three to six inches or more in length, thick, firm, 

 the lower ones usually three-parted with entire, lance-shaped seg- 

 ments ; upper leaves undivided, lance-shaped, entire, all with rough 

 edges and pinnate veins. Heads very many, about an inch and a 

 half broad, on slender peduncles, in open corymbose clusters ; rays 

 six to ten, obtuse, entire, bright golden yellow; disks brownish; 

 outer bracts of the involucre linear, obtuse, spreading, united at 

 base, much narrower than the ovate, pointed, inner ones ; when 

 rolled between the fingers the heads exhale the odor of anise. 

 Achenes oblong elliptic, narrowly winged, and without a pappus. 



Means of control 



Prevention of seeding and starvation of the roots by persistent 

 cutting. Hand-pulling or grubbing out the roots. 



