Name: greene Savannah, GA (Sunset 28) (Zone 8b) I have no use for internet bullies!
There was no size reference in the photo. I was guessing the wood was maybe 2.5 - 3 inches which would make the roots way too big for Sisyrinchium. Anyway, whatever it is, if you are gonna toss it, please consider offering it to someone for postage.
Sunset Zone 28, AHS Heat Zone 9, USDA zone 8b~"Leaf of Faith"