Penthorum... dissectum?

Have a look at the plant in the photograph below. It appears to be Penthorum sedoides with highly dissected leaves. I couldn't find any named forms of P. sedoides with dissected leaves, so it must just be an abnormal individual. For more information on P. sedoides, click here.


This photograph was taken in a mitigation wetland in Lake County, Indiana. Has anyone seen anything like this?