396 CONNECTICUT GEOL. AND NAT. HIST. SURVEY. [BuU. 



Coreopsis lanceolata L. (lance-shaped). 



Rare. Roadsides: Southington (Andrews & Bissell), Ox- 

 ford (Harger). July. Adventive from the Southwest. 



BIDENS L. Bur Marigold. 

 Bidens discoidea (Torr. & Gray) Britton (having only disk 

 flowers). 

 Coreopsis discoidea Torr. & Gray. 



Swamps and about ponds. Occasional near the coast and 

 throughout the valley of the Connecticut River. Aug. — Sept, 



Bidens frondosa L. (leafy). 

 Bidens melanocarpa Wiegand. 

 Common Beggar-ticks. Stick-tight. 



Common. Moist fields, swamps, waste places and culti- 

 vated ground. Aug. — Sept. 



Bidens vulgata Greene (common). 

 Bidens frondosa Wiegand, not L. 

 Beggar-ticks. Stick-tight. 



Frequent. Fields, roadsides and cultivated ground, in 

 moist soil. Aug. — Sept. 

 Bidens comosa (Gray) Wiegand (bearing a tuft of hairs). 

 Bidens connata Muhl., var. comosa Gray. 



Frequent. Moist soil in various situations. Aug. — Oct 



Bidens connata Muhl., var. petiolata (Nutt.) Farwell (having 



leaf-stalks). 

 Bidens connata of authors in part. 

 Swamp Beggar-ticks. 



Frequent. Swamps and wet woods. Aug. — Sept. 



A form with ray flowers occurs occasionally. 



Bidens cernua L. (nodding). 



Bidens cernua L., var. elliptic a Wiegand. 

 Stick-tight. 



Common. Wet meadows, along ditches and on shores. 

 Sept.— Oct. 



Bidens laevis (L.) BSP. (smooth). 

 Bidens chrysanthemoides Michx. 

 Bur Marigold. 



