The first is sassafras. The star shaped leaf is Sweetgum, Liquidambar styraciflua.

The orange flowers appear to be Asclepias tuberosa, aka Butterflyweed, a nice native plant. I think the tree is Black Walnut, Juglans nigra. Here is a link that might be useful:

Here is picture of the berries. They are just starting to ripen. Pete N. Carolina

You have a Tamarisk. My advice would be to kill it. Out here, Utah and most of the west, they are invasive weeds. They have taken over much of the riparian lands here and have choked out much of the native vegetation and animals. Aside from producing literally thousands of seeds a year, they have very deep tap roots, often going down over 20 feet. They will lower the ground water below where other plants cannot reach it. This reduces competition. Another way they reduce competition is by taking salts from the ground and water and secreting them from their leaves onto the ground. Over time this raises the top soil salinity and, again, reduces competition. These are very tough plants. We have had summer with no rain for three or four months, and they do not seem to have been bothered at all. Even fire will not kill them, they just grow back from the roots. They also associate will a bad crowd. Siberian Elms, Tree of Heaven, Russian Olive, you know the disreputable type. Recently, a beetle has been imported from the Mediterranian area where these things come from. It eats only tamarisks and seems promising in at least thinning them to allow the natives to come back.