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亚龙木为龙树科(Didereaceae)多年生木本肉质灌木,有所准备于非洲东海岸诸岛,是苍炎龙的大型近似种,别名大苍炎龙,但远比苍炎龙高大,在原产地株高可达4～5米。植株单生,直立,偶有分枝。银灰色的茎干上错落有致地分布同色的锥状刺;心形叶翠绿、肥厚多肉,稀疏单生于刺与刺之间的空隙中,与众不同,颇具风韵(见照)。目前亚龙木不仅在我国属稀少种类,就是在国际上也被世界濒危物种公约列为二级保护植物。
Yaron is a perennial woody fleshy shrub of the Didereaceae family. It has been prepared on the islands of the East Coast of Africa and is a large and approximate species of Cang Yan Long, alias Cang Yan Long, but much taller than Cang Yan Long The origin of up to 4 ~ 5 meters. Plants solitary, erect, occasionally branched. Silver-gray stems on the patchwork of the same distribution of conical thorns; heart-shaped green leaves, fat and fleshy, sparse solitary born in the gap between thorns and thorns, distinctive, quite charm (see photo). At present, the Asian dragon is not only a rare species in our country, but also in the world as a world protected endangered species as a secondary plant.