Bobea sandwicensis

About

ʻAhakea or Hawaiʻi dogweed is a species of flowering tree in the coffee family, Rubiaceae, that is endemic to Hawaiʻi. It inhabits lava plains as well as dry, coastal mesic and mixed mesic forests at elevations of 100–1,220 metres (330–4,000 ft) on the islands of Oʻahu, Molokaʻi, Lānaʻi, and Maui. It is threatened both by habitat loss and competition from invasive species.

Summary from Wikipedia