Josh: Wow! You know of a tuliptree 170 feet tall after 69 years? Tell me about it and the site. I can believe it, but I would like to have the details. Site indexes are not based on the fastest tree one can find, but are based on an average of several (I can't remember exactly the methodology) of the tallest dominant trees. 140 feet in 50 yeasrs for tuliptree is documented. Now that may not be an absolute maximum, and it may not be a statement about the absolute fastest growing tulip tree that has been found. 169 feet in 69 years does not contradict what I know about the maximum growth potential of tuliptree.
--Gaines
