I think this might not be an intended plant
suggestion is feverfew
doubtful knights spur?
Waif in jackson prairie over exposed yellowish, calcareous Yazoo clay along the railroad. Very disturbed, but retaining overall structure of "bald prairie" type, possible unnatural erosion. Schizachyrium scoparium, Desmanthus illinoensis, Juniperus virginiana, Cornus drummondii, lots of exotics.