It appears to be Pagoda dogwood, Cornus alternifolia which is a small tree. This far north it grows in full sun as well as full shade.

Thank you both. I’m kind of shocked to have found a decent plant - mostly I’ve been cutting down nasty invasives!

….. in a moist wood.

I'd compare your shrub with silky dogwood Cornus amomum

Thanks, Sam. I will look closer when I get home, but from the pics the leaves sure do look opposite and not alternate. I suspect you’re right on the money. I must have a couple dozen of them and never noticed until now. The woods has so many sunny openings now that these are blooming like crazy.

"I’m kind of shocked to have found a decent plant - mostly I’ve been cutting down nasty invasives!"

Yes, the return of native plants is reward for all the hard work of removing invasives. It's slow, physical, and tedious work, but the payoff is gratifying. In my woods, I'm seeing a return of the native hazelnut (Corylus Americana). Yay!

Sam, definitely think you are right about Cornus amomum. Opposite leaves, slight degree of fuzz to them.

Maackia, good for you! It is pretty exciting for me, too.

Wow, C. amomum. It don't think that one is easy to identify, but for Sam it’s a piece of dogwood cake.

Another possibility is C sericia (red-osier dogwood). A clue would be noticeably reddish stems older than this yrs' green growth, tho I don't notice that from what I can see in your pics -- Sam is prb'ly correct. Here's my red-osier:

Beng, thanks for giving me something else to think about. Looks like C. sericea has white pith, and C. amomum has brown. My pic is pretty blurry but it is white.

Bark on the trunk is shown here:

So it looks more like C. sericea at this point. I guess the berries confirm without doubt. Most are growing as single trunks about 3’ wide by 10’ tall.

It may be hard to distinguish between the two dogwoods -- they're pretty similar. Your last pic does show a reddish stem. Red-osier fruit will turn dark blue then finally develop a whitish hue, and quickly disappear as the birds notice them, but I think silky dogwood fruit is similar.