206 DICOTYLEDONOUS PLANTS. 



posite and connate at base. Flowers small, few, on peduncle? 

 3 inches Jong, pale red. 



41. COREOPSIS. Linn. 



Involucre double, each many-leaved ; the inner one equal, 

 subcoriaceous and coloured. Receptacle chaffy, scales flat. 

 Acines compressed, emarginate, "bidentate \ dentures rarely 

 awned. * Syngcnesia. Frustranea. 



* Leaves opposite, divided. . 



1. C. tnchosperma Mich. : smooth ; leaves generally quinate, pin- 

 nate ; segments linear-lanceolate, serrate ; flowers in corymbs ; leaf- 

 eis of the outer involucre spathulate, ciliate-serrate ; rays entire ; 

 acines cuneate, 2 4-toothed". 



HAB. Swamps. N. J. and Car. Aug., Sept. $ . Stem 2 3 

 feet high, branching towards the top. . Flowers peduncled, op- 

 posite and terminal ; rays about 8, lanceolate, yellow. 



Tickseed Sunflower. 



2. C. tripieris Linn. : smooth ; leaves petiolate, lanceolate, very en- 

 tire; radical ones pinnate.; cauline ternate; rays* entire ; acines obo- 

 vate, naked at the summit. 



HAB. Mountains. Penn. to Car. Aug., Sept. !. Stem 4 6 

 feet high, terete. Flowers rather small, in a loose terminal co- 

 ryhib ; rays about 8, yellowish. 



** Leaves alternate. 



3. C. gladiata Walt : stem smooth, dichotomous towards the sum- 

 mit ; leaves narrow-lanceolate, entire, thick, tapering into a petiole ; 

 acines obovate, winged, the wings serrulate j pappus 2-awned, bristly. 

 C. dichotoma Mich. 



HAB. Swamps. N. J. and Car. July Sept. <. Stem 2 3 

 feet high, simple and slender. Leaves thick, 3 6 inches long. 

 Flowers terminal ; rays 8, dilated, trifid-yellow j disk dark pur- 

 ple. 



4. C. aspera 'Pursh : leaves lanceolate-linear, rough; upper ones 

 alternate ; lower opposite ; stem 1-flowered. 



HAB. In Maryland. Pursh. . , 



- ' 



42, ACTINOMERIS. Nutt. 



Involucre simple, many-leaved ; leaves nearly equal. Rays 

 remote, elongated, (4 to 8.) Receptacle small and chaffy, 

 the scales embracing the margin of -the acines. ficiues com- 

 pressed and marginated, with the summit persistently 2-awn- 

 ed. < % '*. Syngenesia. Frustranea. 



A.? squatrosa Nutt. : stem erect, winged, -pubescent towards the 

 summit ; leaves lanceolate, serrate, scabrous ; panicle loose, leafy ; 



