Could no 15 Bungle and Zippy may like this tree, 8 & 5 letters be sunshine tree? there was a character in the early days called sunshine and there is a tree of that name. Just a thought. Can't think of anything else.
Thanks to you both. I thought of umbrella but I have already used that one on another question could be used twice of course. Slipped up on the 5 letters should have read 4 so umbrella tree is a good answer.