Trees, Shrubs and Conifers: My followup to 'walnut again?', 1 by Pistil

Pistil wrote:
Hi Turtles. A few more photos could help a lot. Try to get closeup of a 'leaf scar'. Are there any bigger trees there, so maybe you could look for a nut or seed on the ground? Are there any thorns? Are they all little 'trees" like the one pictured or do they generally grow shrubbily (I just made that word up).
The deciduous trees with alternate compound leaves include the walnuts and hickories, but also Sorbus (includes native Mountain Ashes and the naturalized European mountain ash) and even the dreaded Tree-of-Heaven Ailanthus altissima. Honey locust has thorns, except that there are some thornless ones planted in yards. Look at your neighbors yards-if these are sprouting all over your yard, the seeds or roots had to come from somewhere. Once you find a bigger tree, you should find flowers or fruit of some kind.
Here is a close up of a twig with leaf scar. Leaf scars are very helpful for identification.