One of our favorite wildflowers this time of year is Golden Banner. It's also a favorite among bumblebees as you'll see in this video!
Golden Banner is part of the Pea Family (Fabaceae). It is a good species for pollinators and hightly attractive to bumblebees.
It is also a Nitrogen Fixer. Nitrogen fixing bacteria that reside in nodules on the root of the plant convert nitrogen from the air into a form (ammonia) that plants can use.