Melicope feddei, commonly known as hiiaka, is a species of flowering plant in the family Rutaceae, native to the Hawaiian Islands. This species is a significant component of the native Hawaiian flora, contributing to the unique biodiversity of the archipelago. Melicope feddei is typically an erect shrub or small tree, reaching heights of up to 5 meters. Its growth habit is generally upright and somewhat spreading. The leaves are arranged oppositely along the stems and are compound, usually with three leaflets. Each leaflet is ovate to elliptic in shape, with entire or subtly crenulate margins, and measures approximately 5-12 cm in length and 3-6 cm in width. The upper surface of the leaves is typically glossy green, while the underside may be paler. The plant produces inflorescences that are axillary or terminal panicles, bearing small flowers. The flowers are generally inconspicuous, with four petals, and are typically white or pale greenish-white. Following pollination, the plant develops fruit in the form of a capsule. These capsules are typically lobed and dehiscent, releasing small seeds. The bark is smooth and gray on younger stems, becoming rougher with age. The native distribution of Melicope feddei is restricted to the Hawaiian Islands, where it is found in mesic to wet forests. It thrives in areas with moderate to high rainfall and prefers well-drained soils. Its natural habitat is often characterized by a diverse understory and canopy, typical of Hawaiian montane wet forests. While primarily found in its native range, Melicope feddei may be cultivated in suitable climates for its ornamental value, particularly in botanical gardens or by enthusiasts of native Hawaiian plants. Cultivation requirements generally include moist, well-drained soil, partial shade to full sun, and protection from frost. Melicope feddei holds ecological importance as a native plant that provides habitat and food resources for indigenous fauna. Its role in the native ecosystem is integral to the health and stability of Hawaiian forests. While not widely utilized for agricultural, medicinal, or culinary purposes, its significance lies primarily in its contribution to the native flora and its potential as an ornamental plant for those seeking to grow indigenous species. An interesting characteristic of Melicope feddei, shared with other members of the Rutaceae family, is the presence of aromatic oils in its leaves and stems, which can be released when the plant is bruised or crushed, emitting a distinct fragrance. This aromatic quality is a common trait within the citrus family, to which Melicope belongs. The plant's adaptation to the specific environmental conditions of the Hawaiian Islands, including its reliance on native pollinators, highlights its evolutionary history within this isolated archipelago.