184 



WEEDS AND USEFUL PLA^'TS. 



It is, however, quite an objectionable weed, on account of the vast quai> 

 tity of its adhesive fruit, in autumn. There appear to be several varie- 

 ties of the plant, — noticed in Torret & Gray's ^^i", A. Flora. 



^* Jkenes slender, linear, 4-sided, beaked at summit, mostly smooth. 



3. B. bipiima'ta, Z^- Leaves bipinnately dissected, petiolate, — the 

 segments lanceolate or oblong-ovate, mucronate, usually narrowed at 

 base ; heads few-rayed, small, on slender angular-sulcate terminal and 

 axillary peduncles ; outer scales of the involucre scarcely as long as the 

 inner ones ; akenes long and slender, 4-angled and grooved, 3 - 4-awned. 

 BiPixxATE BiDExs. Spanish Needles. 



Plant glabrous. iZoof annual. 5'fe?n. 2-4 feet high, quadrang-ular, branched. Leaves 

 2-4 or 5 inches long, deltoid-ovate in the outline ; pe'.ioles 1-3 or 4 inches long. Heads 

 oblong, slender ; rays 3-4, obovate, small, yellow with dark veins ; dUk-floreis about 20, 



Fir,. 1'2.5. Spanish Needles (Bidens bipinaata.) 1-J6. A m iture ;il-:cne, w.;h 4 downward 

 bristly awus. 



