202 co5iros[TK family. 



C. Drummbndii, of Texas, is low and spreading, rather hairy, with leaves 

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

 broad rays golden yellow with small dark spot at base. 



* * ® Disk-flowers ydloio : raijn veVoio with a darker and purplish-streaked spot 

 near the base : akenes winged and 2-tootlim. 



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

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

 handsome. 



» * * :^ Disk-flowers and rays (!' long) entirely yelJow; akenes orbicular, much 

 incurved and broaiH-y winged. when ripe, crowned with 2 little teeth or scales. 



C. lanceolita. 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. aurieul^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. Bays entire or nearly so, oblong or lanceolate: akenes oblong, with a very 

 narrow wing or bai'der, not incurved, and oliscurely if at all 2-tocltlied at the 

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

 flowers all yelloio. y 



» Loio, l°-3° high, leafy to the top: leaves really opposite and sessile, but divided 

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

 all but the first are cult in gardens, 

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

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



C. vertieill&ita, has the pair cut into once or twice pinnate almost thread- 

 shaped divisions, smooth. 

 C. 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, eorynibed heads, very short outer involucre, 

 and blunt rays. 



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

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

 and resembling leaves : branching plants of wet grounds, with thin leaves 

 mostly of 3 -7 pinnate toothed or cut veiny lea/lets ; resembling the next 

 genus, but the awns not downwardly barbed. Q) ® 

 C. trichOSp6rma. Swamps mostly near the coast, 1° -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 in the fore- 

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



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

 lanceolate ofteil 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. 



53. BIDBNS, BUR-MARIGOLD, BEGGAR^TICKS. (Latin for tivo- 

 toothed, from the usually 2 awns of the pappus.) Our species (i) 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. frondisa, Common Beggar-ticks. Coarse weed in low or manured 

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



