Please help with identification of this wildflower that I found growing in my yard here in Georgia zone 7a. The leaves are rigid and have a sandpaper-like surface. It seems to grow on individual stems, not bushy and tops out at about 3'-4' tall. The closest name I can find in a wildflower data base is Euphorbia. Thank you!

It's a Silphium of some type. I would guess Starry Rosinweed (Silphium asteriscus) , but there are a few similar species.

I agree, Silphium and it does look a lot like S. asteriscus that Kent linked to which is found in many parts of the South: http://plants.usda.gov/core/pr...

Another Silphium found in Georgia is Mohr's Rosinweed (Silphium mohrii)
http://www.georgiawildlife.com...