胡桐屬常綠喬木，廣泛分佈印度洋及西太平洋各大陸與島嶼的濱海地區。對生橢圓形革質葉片，有排列整齊緻密的葉脈。圓錐花序頂生，花白色有花瓣4枚，花藥黃色。果實球形，成熟黃色或紫色。開花春至夏季，結果秋至冬季。

An evergreen tree in the genus Calophyllum, widely distributed in the Indian Ocean and the coastal areas of the western Pacific and islands. Opposite elliptical leathery leaves with neatly arranged veins. Terminal panicles, white flowers have 4 petals and yellow anthers. The fruit is spherical and ripe yellow to purple. Flowering from spring to summer, the fruiting from autumn to winter.

適合全日照溫暖環境，原生環境為濱海地區，枝葉耐風，根系抗鹽、耐貧瘠。春、夏季各施用一次長效性綜合肥料。修剪以去除細弱枝為主。繁殖採用播種法。

Suitable for full-sun warm environment. Indigenous to littoral area, the branches and leaves can withstand wind; the roots are salt-resistant and barren-tolerant. Apply long-acting comprehensive fertilizers once in spring and summer. Pruning focused on weak branches. Propagated by seeding.

耐風抗鹽，適合作為工業區與濱海地區綠化使用，也適合都市環境作為遮蔭樹與行道樹使用。種子含油量高，可作為各種工業用途。木材質地堅硬且耐水溼，是造船與搭設橋樑的良材。

Wind and salt resistant, suitable for use as greening in industrial zones and coastal areas; or as shady trees or street trees in urban areas. The seeds have rich oil content and can be used in various industrial applications. The hard and water-resistant wood is a good material for making ships and bridges.