420 



EXPERIMENT STATION BULLETIN. 



Fig. 213. 



Leafy-bracted Tickseed. Bidens comosa 

 (A. Gray) Wiegand. A smooth, straw colored 

 annual, 15-120 cm. high; leaves narrow, not 

 compound; heads few, large; ray flowers want- 

 ing; achenes about 1 cm. long, nearly smooth, 

 awns, three-barbed downward. 



A native, growing in wet soil. 



Fig. 214 (186). 



Purple-stemmed Swamp Beggar-ticks. 



Bidens connata Muhl. A smooth, purple, 

 erect, much-branched annual, 15-200 cm. high; 

 leaves narrow; ray flowers none or small. 



