COULD YOU TRY AN ARGYLE COLORED OAK TREE WITH MOSS, INSTEAD OF THE COLORED SQUARE IN NUMBER 11 AS OUR OFFICE PARK HAS MANY HUGE LIVE OAKS ON THE PROPERTY.
Someone has already provided a nice Live Oak, so rather than try to top that, I used a simple, easy to recognize, easy to reproduce icon from a Live Oak (an acorn), with the argyle pattern.