Q: My brother and sister-in-law found several of these where they walk for exercise near Jesup, GA and wanted to transplant a couple. They thought it was some kind of fern and but they dug it up it had a carrot-like root.
A: Plant expert Bobby Wynn, owner of Wynn’s Intensive Lawn Care in Douglasville, says it’s rosinweed, Silphium compositum. He notes “By late summer it grows a 4 to 5 foot stalk with yellow flowers. I’ve seen it along power/pipe line easements and occasionally along the highways. I know it grows a taproot but, I have no idea if it looks like what you have pictured. Can’t wait to dig one up now!”
See also Kidneyleaf rosinweed
check this link and note the red veins Silphium compositum