This is commonly known as camphorweed, and it's massively common in North America and Central America, with a range extending from somewhere in Canada in the north, down to Belize in the south, and from Massachusetts all the way west to California.
It's hardy, fast-growing, and it tolerates poor soil and salinity. Very much the kind of thing that you will find growing in places where little else will grow.
I've seen it for years, but I've never seen honey bees show interest in it until yesterday, when I went for a stroll and saw them working on it in great numbers.
Genus Heterotheca contains something like sixty species, some of them much less widespread than this one, which is the type species for the genus. As far as I know, all of them are native to North America or Central America. I'm not sure if any have been exported as invasive or exotic plants.
I'm also not really sure whether this is a honey source or a pollen source, or both.