I don’t know the plant or the insect.  Rather pretty up close, the insect has a furry looking yellow jacket, but is not what I think of as a “Yellow Jacket.” The small flowers are on tall stalks growing in standing water at the edge of a swampy area.

The insect must have been getting some nourishment satisfaction or good taste because he kept at it, going round and round the plant.

Except for the purple highlights on the leaves, the plant is not particularly attractive to look at. I should go back in a week or so and see what it might have transformed into.