大戟屬多肉質灌木，原產東非至南非東部。灌木狀多肉植物，株高1.5m，株幅1m。莖上有3條白色的稜，表皮淡綠色，直徑10cm，會有不規則的收縮，稜緣波狀彎曲。叉狀硬刺，長3~7cm。大戟花序黃綠色，開於枝端的稜上。

A succulent shrub of the genus Euphorbia, native to East Africa and eastern South Africa. Plant height 1.5 m, width 1 m. Stem with 3 white ribs, epidermis pale green, 10 cm in diameter, irregularly zig-zag shaped, rib margin wavy and bending. Fork-shaped rigid spines, 3-7 cm long. Cyathium yellow-green, blooming on the top of the ribs.

栽培：全日照通風環境下可生長良好。根系強健，幾乎各種介質都可以生長，栽培位置需避風且立支柱。要避免強風倒伏、折斷，或因風吹搖晃枝條而相互刺傷造成傷疤影響美觀。高溫期生長，可觀察介質乾就澆水；低溫期生長停滯，可進行節水。

The plants thrive in full sun and airy conditions. With strong root, it suits to almost all types of medium but requires planting sites sheltered from wind and supported by stakes to avoid being blown down and broken by strong wind; furthermore, strong wind will also shake the stems to stab each other and cause scars to affect the appearance. As a summer grower, the species requires watering when the soil appears dry, and reducing water use when it stops growing in winter.

型態瘦骨嶙峋，非常奇特。適合單株種植欣賞姿態，或與其他多肉植物組合設計作為背景襯托使用。因為刺較長且堅硬，操作時須注意安全。

The thin and bony plant poses an unusual style, suitable to be planted alone to exhibit the posture, or mixed with other succulents as a background setting. Beware of the long and hard spines when handling them.