202 COMPOSITE FAMILY. 



C. Drummbndii, of Texas, is low and spreading, rather liairy, witli leaves 

 of 3-7 oval leaflets, or some of thera simple, heads on long peduncles, and very- 

 broad rays golden yellow with small dark spot at base. 



* » ® Disk-Jlowers ydlow : rays udlx>w with a darker and purplish-streaked spot 



near the base : akenes winged and 2-toothea. 



C. coron&ta, of Texas, is low, with slender-petioled leaves oblong or spatu- 

 late, or some of them 3 - 5-partcd, and very long peduncle ; rays broad and 

 handsome. 



» * * ^ Disk-flowers and rays (V long) entirely yellow; akenes orbicular, much 

 incurved and broadly winged when ripe, crowned with 2 little teeth or scales. 



C. lauceol&ta. Wild W. & S., and cult, in gardens ; 1° -2° high, smooth 

 or sometimes downy, in tufts, with lanceolate or oblanceolate entire leaves 

 mostly crowded at the base, and long slender peduncles : flowers in early 

 summer. 



C. aurioul^ta. Wild W. & S., and in some gardens; taller, sometimes 

 with runners or suckers at base, leafy to near the top ; upper leaves oblong, 

 lower roundish and sometimes auricled at base or with 3-5 lobes or leaflets. 



§ 2. Rays entire or nearly so, oblong or lanceolate : akenes oblong, with a very 

 narrow wing or border, not incurved, and obscurely if at all 2-toothed at t!ie 

 apex : scales of outer involucre narrow and entire : heads rather small, the 

 flowers -all ydlow. ^ 



* Low, l°-3° high, leaf)/ to the topi leaves really 'opposite and sessile, but divided 



into 3 leaflets, thus seeming to be 6 in a ivhorl. Wild chiefly in S. States, 

 all but theflrst are cult, in gardens. 

 C. senifolia, has seemingly 6 larice-ovate and entire leaflets in a whorl, 

 (i. e. two, but each 3-divided) smooth or downy.' 



C. V6rticill^ta, ha.s the pair cut intd once or twice pinnate almost thread- 

 shaped divisions, smooth. 

 G. delphinifdlia, very like the last, but with fewer lance-linear divisions. 



* « Tall, leafy to the top, with evidently opposite petioled leaves. 



C. tripteris. Rich ground W. & S., with simple stems 4° -9° high, leaves 

 of 3 - 5 lanceolate entire leaflets, coi-ymbed heads, very short outer involucre, 

 and blunt rays. 



§ 3. Rays oval or oblong, golden ydlow, slightly notched : akenes wingless, not in- 

 curved, bearing 2 awns or teeth for a pappus : outer infolucre conspicuous 

 and resenibling leates : branching plants of wet grounds, with thin leaves 

 mostly of 3-7 pinnate toothed or cut veiny leaflets; resembling the next 

 genus, but the awns not downwardly barbed. ® ® 



C. trichosp^rma. Swamps mostly near the coast, l°-2° high, with 3-7 

 lanceolate or linear cut-toothed leaflets or divisions, numerous heads, and nar- 

 row-oblong or linear wedge-shaped marginless akenes with 2 stout teeth. 



C. atirea, only S., has upper leaves often simple, lower nearly as iu the fore- 

 going, and shorter wedge-obovate akenes with 2 or 4 short chaff-like teeth. 



C. aristdsa, from Illinois S., has more compound leaves with oblong or 

 lanceolate often pinnatifid leaflets, and broad-obovate very flat akenes slightly 

 margined and bristly ciliate, the pappus of 2 long and slender awns, or some- 

 times 3 or 4, or in one variety none at all. 



63. BlDENS, BUR-MARIGOLD, BEGGAR-TICKS. (Latin for two- 

 toothed, from the usually 2 awns of the pappus.) Our species ® or @ ; 

 fl. summer and autumn. The akenes adhering to the dress or to the fleece 



■ of animals by their barbed awns. 



§ 1. Akenes broad and flat, with bristly ciliate margins. 

 * Coarse and very homely-weeds, commonly without any rays. 

 B. frondbsa, Common Beggar-ticks. Coarse weed in low or manured 

 grounds, 2° - 6° high, branched, with pinnate loaves of 3 - 5 broad lanceolate 



