A Polynesian genus with 5 species in Hawai`i and one endemic species in the Marquesas.
Habit Glabrous trees or shrubs with a strong carrot like odor when cut.
Leaves Leaves palmately compound, opposite, leaflets 3-5(-7), margins entire or toothed, midvein, margins, petiolule, and petiole usually tinged purple, petiolule often laterally compressed, stipules absent.
Flowers Flowers perfect and functionally staminate (the plants andromonoecious), in terminal, erect, oppositely branched panicles of umbellules, bracts minute, subconnate, persistent, forming an involucel below the umbellules and a pseudocalyx below each flower, pedicels jointed below the ovary; buds dark purple; calyx of 5 short, basally connate teeth; petals 5(6), purple externally, greenish within, valvate, caducous, triangular to ovate or oblong, apex inflexed; stamens 5, pale yellow, spreading; ovary inferior, 2-5 carpellate; styles 2-5, distinct, connate more than 1/2 their length, or occasionally completely connate, when connate forming a short, conical stylopodium, the distinct arms ascending to spreading, each with a stigma on the upper surface.
Fruit Fruit a drupe, green, ripening dark purple, exocarp fleshy, globose, or laterally compressed and orbicular or oblate to ovoid or obovoid, 3-7.5 mm long.
Seeds Pyrenes cartilaginous, laterally compressed, as many as the styles.