flower gall on Yellow Coneflower - Asphondylia ratibidae Sand Hill Prairie, Chichaqua Bottoms Greenbelt, Polk County, Iowa, USA July 29, 2011 Size: ~4 mm tall
A few flowerheads of the very abundant Yellow Coneflowers (Ratibida pinnata) in this prairie were distorted by unusual growths of some disc flowers. Are these galls?
gathering_2011
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