The fluffy stuff was all around the branches and leaves near the middle and base of the bush. The little critters were on the underside of leaves. I also included a picture of the flower in case someone needs to identify the plant in order to answer this question.
It looks like White flies. Nasty little critters. When my heirloom iris got an infestation, I carefully removed the most infested leaves and put them in an enclosed bag and into the trash. Then I blasted the leaves with my garden hose to scatter them. I removed any thing else I found by hand and haven't had a problem since. I read on the Old Farmer's Almanac to use an insecticidal soap like Safer Soap is a good idea too. I just prefer using as little on my plants as I can.
