Chanctonbury Wood                                      -      -      - 
(-------------------------------------------------)     W <---(M)---> E
                                                        -      S      -

Normal undergrowth here, with the same ruined bushes.  It seems that the
orcs ritualistically use the bushes of one kind as latrines...  How odd. 
Perhaps it is some kind of ritual to their god, only unusally well-enforced
amongst the chaotic orcs.