Black-eyed Susan is one of the first flowers I learned about as a kid, and it's so easily recognizable with those blazing yellow rays and dark center. It also blooms forever, usually from July right through to October.
 
     Pollinators love Black-eyed Susans.  It's larval host to the Silvery Checkerspot butterfly and the Wavy-lined Emerald and Blackberry Looper moths.  Along with butterflies, native bees, bumblebees, beetles and other fliers swarm around Black-eyed Susans.  Songbirds eat the seeds in the fall.
 
     Black-eyed-Susan is actually considered an annual or short-lived perennial, but it self-seeds so much it reliably comes back year-after-year.