玉蕊屬常綠或落葉喬木，原產亞洲、大洋洲、非洲熱帶地區的河口溼地紅樹林及海岸林中。互生橢圓形葉片有鋸齒，葉片常叢生於枝頂。總狀花序自頂生或幹生，花序下垂，長度可達1公尺以上。披針形白色花瓣4枚。雄蕊白色或粉紅色。果實纖維質，能漂浮於水上，借由海潮傳播。開花春至秋季。

An evergreen or deciduous tree in the genus of Barringtonia, native to the estuarine wetland’s mangroves and coastal forests of Asia, Oceania and tropical Africa. Elliptical leaves are alternately arranged, with serration on the margin and usually grow in clusters on the top of branches. Terminal or cauliflory racemes with hanging inflorescence up to 1 meter long. Four lanceolate white petals. Stamens are white or pink. The fibrous fruit can float on the water and spread by the tide. Flowering from spring to autumn.

全日照環境，根系耐水濕，在陸地栽培亦能生長良好。天然分枝少，通常不須進行修剪。葉片易受毛蟲危害，尤其在新葉伸展期更需防範。繁殖使用播種法。

Grown in full sun environment. The plant is water-tolerant on the root system but can also thrive in land cultivation. It’s less branchy so usually doesn’t need pruning. Leaves are susceptible to caterpillar damage, especially during new leaf development stage. Propagated by seeding.

花朵構造特殊，花序造型優美且具有香味，適合作為庭園樹與行道樹使用，尤其在夜晚活動頻繁的地點如市區廣場、公園等位置種植，更能凸顯夜晚開花的特色。

The flowers are uniquely structured, and the inflorescences are beautiful and fragrant, suitable for use as garden trees and street trees, especially in places with busy night activities such as city squares and parks for people to enjoy the night blooms.