土沉香屬常綠或半落葉性喬木，臺灣原生，亞洲、澳洲熱帶濱海地區亦有分佈。枝具多數皮孔。互生革質橢圓形或闊橢圓形葉，全緣或有不明顯的疏細齒。花單性，雌雄異株，聚集成腋生、單生或雙生的總狀花序。蒴果球形，具3溝槽，熟時暗褐色，分裂為3小乾果；種子球形。

An evergreen or semi-deciduous tree in the genus Excoecaria, native to Taiwan and also distributed in tropical coasts of Asia and Australia. Branches with many lenticels. Leaves alternate, leathery, elliptic or broadly elliptic, entire or with inconspicuous sparse teeth. Flowers unisexual, dioecious, aggregated into axillary, simple or double racemes. Capsule spherical, with 3 grooves, dark brown when ripe, split into 3 small dried fruits; seeds spherical.

全日照溫暖環境。原生濱海地區，因此耐旱、耐鹽、耐濕、抗風，適合濱海地區與到道路旁不易維管處綠化使用。以種子或扦插繁殖。

The plant normally grows in warm environments with full sunlight; naturally growing in coastal areas, tolerant to drought, salt, humidity and resistant to wind, commonly planted to green the coastal areas and roadsides where are not easy to maintain. Reproduced from seeds or cuttings.

可作庭園景觀樹、海岸防風樹。木材燃之發出沉香味可作沉香的代用品，亦可作建材、包裝箱及魚網的浮苓。枝葉受傷流出乳汁具刺激性，沾觸皮膚會引起紅腫，誤入眼睛，其害尤大，故英名為 Blinding Tree。

The plant can be planted as garden ornament trees and coastal windbreak trees. The wood emits scent when burned and can be used as a substitute for agarwood; other uses like building materials, packaging boxes and buoys of fish nets. The branches and leaves exude a poisonous liquid on the wounds, which causes blisters on the skin and seriously injurious to the eyes, that’s why it’s also nown as ‘blinding tree’.