Chlorotic creeping thistle

Chlorotic creeping thistle

Observation - Chlorotic creeping thistle. Description: I came across a number of these along about 5 miles of the southwest coast path. Some were on an organic farm so I am discounting herbicide damage. see http://www.invasive.org/proceedings/pdfs/11_215-220.pdf

I came across a number of these along about 5 miles of the southwest coast path. Some were on an organic farm so I am discounting herbicide damage.
see
http://www.invasive.org/proceedings/pdfs/11_215-220.pdf