244 LEGUMINOSAE (PULSE FAMILY) 
clinging to anything they touch, even a bare hand, and in fleeces 
they are very adhesive, carrying strands of wool with them when 
removed. Ticky wool is therefore sharply “cut” in the market. 
Stem erect, slightly ridged and grooved, sometimes attaining five 
feet in height but more often two or three feet tall, smooth below 
but the growing branches densely set with two kinds of hairs, some 
very short, fine, and hooked, others longer, spreading, and glutinous. 
Leaves large, trifoliolate, the leaflets broadly ovate, two to four 
inches long, the terminal one with a footstalk and larger than the 
lateral pair, rough-hairy on the upper surface, white-hairy and net- 
veined beneath; petioles hairy and about as long as the leaves; 
stipules heart-shaped, acute, persistent. Flowers in terminal com- 
pound racemes, very small, less than a quarter-inch in length, 
purple, the standard obovate and the wings attached to the short, 
blunt keel by a small transverse appendage. Pods four- to seven- 
seeded, constricted between the seeds above and below but most so 
on the under side, the joints longer than broad, net-veined, sticky, 
hairy, readily separating and adhering to anything at a touch. 
Means of control 
Close cutting while in early bloom, repeating the treatment as’ 
new shoots appear. Cultivation of the ground destroys the 
perennial roots. 
SHOWY TICK-TREFOIL 
Desmodium canadénse, DC. 
(Meibdmia canadénsis, Ktze.) 
Native. Perennial. Propagates by seeds. 
Time of bloom: July to September. 
Seed-time: Late August to November. 
Range: New Brunswick to the Saskatchewan, southward to the 
Carolinas and Oklahoma. 
Habitat: Woodland borders and thickets along streams. 
Stem two to six feet tall, stout, erect, ridged and grooved, very 
hairy. Leaflets oblong-ovate, nearly smooth above, finely ap- 
pressed hairy beneath, obtuse, with numerous nearly straight veins ; 
petioles very short, the uppermost leaves nearly sessile. Flowers 
in large panicled racemes, densely many-flowered, very showy; 
