# Bidens

Iowa wildflower Wednesday: Bidens

Lora Conrad lives on a small farm in Van Buren County.

Bidens. Whether you call them Bur Marigold or Beggarticks or one of a dozen different common names, they are all Bidens varieties. One year an explosion of many bright yellow flowers but another year, nary a one. That is a characteristic that Bidens cernua and Bidens aristosa have in common…along with making awns with multiple points all the better to grab anything hairy or clothed that walks by.

These are the two Bidens I see the most in Van Buren County. B. aristosa and B. cernua both have lovely bright yellow rays. However, they look different enough to tell them apart on the basis of the flowers alone, as shown in this side by side comparison. (Each is discussed separately below.)

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