Naio (Sweetwood) is a native tree or shrub with dense, aromatic wood and narrow leaves. It grows in dry to moist areas, stabilizing soil and offering wildlife cover. Historically used like sandalwood, it was valued for its scent. Naio tolerates wind and drought, contributes to forest structure, and often signals ecological recovery. Naio essential oil is complementary to ʻiliahi. (Native Plants Hawaii, Forest Starr Environmental, DLNR).