A very unpleasant plant (if you are not familiar with it!). I was still busy hours later removing the burdock fruits from my clothes...
If someone should recognize the exact location (photos 4 and 5), I would be very grateful if you could tell me the coordinates... It was somewhere at Lake Kaweah, where there was a parking lot.
Found on mudflat between Cimarron River and Oxbow lake, left exposed because of the amount of water Corps of Engineer let go out of the Keystone Dam.