What? No upvote. :) Well I am not sure if there is another way but the way I am seeing is five line each with four points of distinction. Now if you arrange the five rays in the shape of a pentagram then the end of each ray will be a shared point with one other ray therefore conserving on points being there is only 10 points for five rows of four trees. Mathematically that is a challenge because a square of such numbers would 20 plants. Now the inner point of each ray would be points of intersection within the pentagram. But hey, I live in Oregon. Maybe I am just really high :)
If there is another way, I certainly do not know. I will apply my mind to another solution, but I would also appreciate elucidation on the subject.
