(like umbrellas), as the ants walk and eat the nectar from the flowers, they spread the pollen.
Madder Family Buttonbush is found near water. The spherical flower clusters are interesting. Close-up photo follows. Perennial Where seen:Oak Ridge Greenways, Piney Falls SNA, Cove Lake SP, Great Smoky Mountains NP
close-up Note the small beetle on the 2:00 position on the flower.