Naupaka kuahiwi Goodeniaceae Endemic to the Hawaiian Islands Off the ʻAiea Loop Trail, Oʻahu  Certainly some of the largest of this species I have personally seen. This shrub is at least 12-15 feet or more tall. The trunk has a diameter of 6-8 inches. It is thicker where the branching begins, perhaps to 10-12+ inches.*  *Admittedly a blurry photo, but it does give some perspective of the diameter of the trunk at its widest in upper part of photo where the branching begins.  nativeplants.hawaii.edu/plant/view/Scaevola_gaudichaudiana