So my garden is probably at its peak bloom right now, as far as species diversity goes that is.
Eutrochium fistulosum, is sadly growing old. This is one of the tallest and more impressive species I have, but also one of the first natives I planted. The rhizome in the ground seems to be dying out in the middle, resulting in an uneven ring of stems emerging from the ground each year. I may need to divide it up next year.
Lobelia cardinalis. Normally I stay away from "hummingbird plants" but I was stricken by how adorable bees look when they try to work the flowers enough to give it a try. Lobelias regardless of the species, all tend to be short lived plants so it's important to let them set seed each year.
Rudbeckia laciniata are all flowering in the background.
Helianthus occidentalis, was a fun addition this year. All the green growth is at the base of the plant with relatively few leaves occurring on their red stems which part a few times to sport a flower atop of each tip. The flowers are otherwise average in size given the genus.
Appalachian Sunflower (becuase Purple Disk Sunflower so far doesn't make any sense) Helianthus atrorubens, grows in much the same with but with more leaves hugging the green stem. Leaves are also fleshier and thicker looking. The flowers are fairly similar to Western Sunflowers in size and appearance.
Maximilian Sunflower, Helianthus maximiliani, has also just started to bloom. It's a much taller plant, much more aggressive (though less so than any goldenrod with new stems occurring closer to the parent plant) and with flowers that are two to three times bigger.
Vernonia sp. I have a bunch of species of this. The biggest one blooming now I acquired on accident thanks to a nursery mix up, so I'm not 100% on the species.