swamp azalea buds, Henne

This is more than a little embarrassing, but when I shot this picture on my daily trek, I was almost sure I knew what species of plant the buds belonged to. They were large and fat, smooth, multi-scaled, and growing on a bare-stemmed shrub with its feet in moist soil at the edge of a wetland. It had to be, I guessed, one of the swamp-type azaleas and I was pretty sure, when I snapped the picture, that it was either a once and future Pinxter Flower (Rhododendron periclymenoides) or the true Swamp Azalea (Rhododendron viscosum). But when I got home and started to try to match the buds with the proper species, I stopped being sure of what I was sure I had. It's probably a kind of azalea, to be sure, but just like the plant, I'm going to have to wait until next year to see it leaf out and bloom. Only then will I be certain... I'll let you know.