I live in north central WV at 1847 elevation. These trees grow wild and are very fragile. Can they be black walnut? I've found no picture or description for the spring blossom it has. They grow like weeds around here.

Looks like black locust.

Edit: I should include, that black locust have very difficult roots to remove, so the earlier you get to them (if they're too invasive), the better.

The blooms on both walnut and locust hand down; these stick up. Could it be a Sumac?

Ditto on sumac.
I'm thinking rhus typhina.

Looks like Sumac to me also. There are about 6 species in WV.
http://bonap.net/NAPA/TaxonMap...

Check the leaf. If there are two parts sticking out at the base of the leaf, then it could be Tree of Heaven. It is highly invasive in the Virginia area. Looks very similar to sumac, but has a totally different flower.

It could be Tree of Heaven. Here's the differences between Sumac and Tree of Heaven:

Tree of heaven: When leaves are crushed, unpleasant smell and clear sap

Sumac: When leaves are crushed, no unpleasant smell, white milky sap.

Might want to wear your gloves.

Daisy

It looks like sumac to me:

The blooms look like sumac.

If the blooms get bright red, it is sumac for sure! I want sumac but it is really hard to control once in your yard. It grows new plants all along the roots.

The red fuzzy berries are tart and make a fruity tea. When I was a kid I was in a "wild foods" course and we ate gooseberries, daisy leaves and those red sumac berries. Most people think they are poisonous. The sumac is a member of the same family as poison oak and poison ivy. There are poison sumac, but I've never encountered it. The sumac that grows really tall with fuzzy red berries isn't, though, don't try to chew on the leaves. Lol.

It looks like Smooth Sumac, Rhus glabra.