The blooms look similar. My master-gardener wife says to look at the leaves. Some sources say crownbeard is a type of wingstem, but it makes a difference to beeks. Crownbeard is a minor forage source (if I trust the sources I've found), but proper wingstem is a better source. According to my bees, they like both the nectar and the pollen. I believe both are late summer/autumn asters.All flows are local. I noticed tonight that the Wingstem (or yellow crownbeard, depending on were you are from) is about my height in the full sun by my house. No blooms, but this seems a little early to me. Not that I'm complaining. If we get that in a couple weeks we could have a good fall flow, which I would be very thankful for.
Just for grins, what is your altitude? Our apiary is at 1800 ft, a bit north of you in the NE panhandle of WV. We're not seeing goldenrod up this high but the wingstem is all over the place.Well, I hope it is Wingstem, the stuff is everywhere, and the bees are flying!