Eugenia koolauensis, commonly known as Koʻolau Eugenia or Nioi, is a species of flowering plant in the myrtle family, Myrtaceae. It is endemic to Hawaii, where it could previously be found on the islands of Molokaʻi and Oʻahu; today populations only exist on the latter. This is one of two Eugenia species native to Hawaii, and the only endemic.
It is a shrub or tree grows 2 to 7 meters tall. The tips of the branches and the undersides of the leaves are hairy. White flowers occur in the leaf axils. It inhabits dry gulches and ridges in coastal mesic and mixed mesic forests on the Koʻolau and Waiʻanae Ranges.
It is threatened by habitat loss and recently Puccinia psidii, a non-native fungal disease. In 2008 there were fewer than 300 mature plants in the Koʻolau Range and only three in the Waiʻanae Range. Fewer than 220 individuals now remain in eight populations in the Koolau Mts. It is extirpated from the island of Molokaʻi, where its former habitat was cleared for pineapple fields. Other threats include, feral pigs, alien plant species, possibly fire, Human threat, stochastic extinction due to small population size.
If you do spot one please note were it is (your phones GPS can really come in handy for this) and tell the U.S. Fish and Wildlife Service as soon as you can.
Find out more where I did. . .