Hypericum prolificum
Shrubby St. John's Wort
Still new to my gardens, grown from seeds sourced from Prairie Moon Nursery.
https://www.prairiemoon.com/hypericum-prolificum-shrubby-st-johns-wort-prairie-moon-nursery.html
A shrubby species, growing to 4' in height in sunny locations. Very showy and popular with pollinators.
Please check out the Prairie Moon listing at the link above for more details.
Photos by BeckyLaboy, Leonora (Ellie) Enking and Eric Hunt via Wikimedia Commons