No photo Lynn. Start with the camera icon and don't try and upload too large a photo
I've just read the whole thread and seen the bit about thorny spikes, none of those mentioned have thorns have they?
An in focus shot of the growing tips would tell for sure. The eleagnus is quite distinctive. I enlarged them to a blur, no help there.
Rhus typhina, Stag's Horn Sumach
It does migrate, suckers like mad. I doubt if you've killed it
that wavy edge to the leaf is more olearia
I find it hard to find grit. The last lot came from an aquarium supplies shop.
Mine did about the same, I'd forgotten about it. RIP