A walk through the park:

Joe Pye weed, a member of the aster family, closeup shows disk flowers and no ray flowers. Fuzzy “hairs” are stigmas.
Scientific names and families:
Joe Pye Weed/Eupatorium maculata – Aster Family: Asteraceae
Summersweet/Clethra alnifolia L. – Family: Clethraceae
Butterfly Weed/Asclepias tuberosa L. – Dogbane Family: Apocynaceae
Swamp Milkweed/Ascelpia incarnata – Dogbane Family: Apocynaceae
Hedge Bindweed/Calystegia sepium – Morning Glory Family: Convulvaceae
Obedient Plant/Physostegia verginiana – Mint Family: Lamiaceae
Blue Vervain/Verbena hastata – Verbena Family: Verbenaceae
Purple loosestrife/Lythrum salicaria – Loosestrife Family: Lythraceae
Goldenrod/Solidago canadensis – Aster Family: Asteraceae
Cup Plant/Silphium perfoliatum – Aster Family: Asteraceae