I know that this is Couroupita guianensis. I'm posting it because this is the third time I've gone looking for Eric La Fountaine's writeup on it, forgetting that that was a Botany Photo of the Day, not on the forums, and it takes me forever to find it. So I'm posting the link to that here. http://www.botanicalgarden.ubc.ca/potd/2010/01/couroupita_guianensis_1.php And while I'm at it, the earlier POTD posting, referenced in that article, is at http://www.botanicalgarden.ubc.ca/potd/2007/07/couroupita_guianensis.php These are two trees in the Foster Botanical Garden in Honolulu. In the first photo, the closer one, on the left, was acquired from Kew Botanical Gardens 45 years ago to provide company for the one behind it, to the right, which was acquired from Kew 90 years ago. One of the comments in the POTD posting was that these trees require cross-pollination from another tree, though the guide's comment was more about sharing of underground nutrients. Third photo is the younger one; fourth the older one. Flowers were only on the older one, but those cannonballs on the younger one must have come from flowers. That would have been fun to see.