PLANTS OF IOWA 233 



3042. B. cernua, L. Nodding Bur-marigold. 

 Common in wet places. 



3043. B. connata, Muhl. Swamp Beggar-ticks. 

 Common in moist soil. 



3044. B. comosa, (A. Gray) Wiegand. Leafy-bracted Tick- 



seed. 

 Common in wet soil. 



3045. B. discoidea, (T. & G.) Britton. Small Beggar-ticks. 

 In wet and waste places. 



3046. B. frondosa, L. Spanish Needles. 

 In moist soil, waste places ; common. 



3047. B. coronata, (L.) Fisch. Southern Tickseed-sunflower. 

 Swampy ground; infrequent. 



3048. B. trichosperma, (Michx.) Britton. Tall Tickseed- 



sunflower. 

 In low ground. 



3049. B. involucrata, (Nutt.) Britton. Long-bracted Tickseed- 



sunflower. 

 In wet places. 



3050. B. aristosa, (Michx.) Britton. 

 In wet soil. 



-GALINSOGA, E. & P. 



3051. B. parviflora, Cav. Galinsoga. 



Waste places ; native of tropical America. 

 HELENIUM, L. 



3052. H. autumnale, L. Sneezeweed. 



In moist places. A common weed in low pastures. 



3053. H. tenuifolium, Nutt. Fine-leaved Sneezeweed. 

 In moist soil. 



BCEBERA, Willd. 



3054. B. papposa, (Vent.) Rudb. Fetid Marigold. 

 Common in waste places. 



ACHILLEA, L. 



3055. A. lanulosa, Nutt. Western Yarrow. 

 Infrequent. 



3056. A. millefolium, L. Yarrow. 



In dry open places ; a common weed. 



