COMPOSITE. 207 



involucre spreading ; receptacle nearly globose. Coreopsis alternifolia 

 Linn. Verbesina coreopsis Mich. Spreng. 



HAB. Penn. to Car. July Sept. l.Ste,m 34 feet high. 



!jjjgfef Leaves alternate. Floicers varying, yellow and white. There 



seems to be still some doubt with regard to its generic character. 



43. BID^NS. Linn, 



Involucre double, the outer unequal. Ray jloreis frequent- 

 ly wanting. Receptacle chaffy, flat. Pappus of 4 reflected 

 or erect and retrosely scabrous avyns. Acines 4-angled.. 



Syngenesia. Frustranea. 



\^B. cernua Linn. : flowers stlbradiate, cernuous; outer involucre as 

 long as the flower ; leaves lanceolate, subconnate, dentate. 



HAB. Near ponds and ditches. Can., N. Y. and Penn, W. to 

 tyttss. Aug. Sept. 0. Stem 1 2 feet high. Ray florets as 

 in all'the species, yellow, often wanting. This plant is some- 

 times not more than 8 inches high, with very small erect flow- 

 ers, when it constitutes the variety minima. 



Water Beggar-ticks. 



2. B. ckrysanthemoides $Tich. : flowers radiate, nodding ; florets of 

 the ray thrice as long as the nearly equal involucre ; leaves oblong, ta- 

 pering at each end, toothed, connate at base. 



HAB. Wet places. N. Y. to Car. Aug., Sept-. ^.Stem 13 

 feet high. Leaves glabrous. Flowers erect, yellow.- Acines com- 

 monly with 4 awns. From the remarks of Mr. Elliott, it is not 

 improbable that several distinct species are covered under the 

 above name. 



3. B. frondosa Linn.': flowers-discoid; outer involucre six times as 

 long as the flower, its leafets ciliate at base ; lower leaves pinnate ', 

 upper on,es ternate, lanceolate, serrate; V. 



HAB.* Woods and fields. N. Y. to Car. Aug.,- Sept. 0. 

 ' Stem 3 4 feet high, branching. Flowers terminal, erect, sur- 

 rounded by a large leafy involucre. Rays none. Jlcines 2-awned. 

 '^ -'* Burr Marygold. 



4. B. connata WilU. : flowers discoid ; outer involucre thrice as 

 long as the flower ; cauline leaves ternate ; lateral ones connate ; flo- 

 ral oblong-lanceolate. . 



HAB. .Fields. Can. to Car. July Sept. , Stem 2 feet "high. 

 Peduncles opposite, 1 -flowered. 



5. B. bipinnato Linn. : flowers somewhat rayed ; outer involudre as 

 long as the inner ; leaves bipinnate ; leafets lanceolate-pinnatifid. 



HAB. Near cultivated grounds. Penn: to Car. July Sept. %. 

 Stem 2 4 feet high. Flowrs on long, mostly terminal pedun- 

 cles. Rays 3, or none,, obovate, yellow. 



6. 'B. beckii Torr. : stem subsimple ; submerged leaves capillaceous- 

 multifid ; emersed ones lanceolate, connate, acutely serrate or laciruV 

 ate j flowers rayed ; the rays longer than the involucre.- 



