noun
dragon tree; Dracaena draco
Refers specifically to the dragon tree species Dracaena draco, a subtropical tree known for its red resin.
See also: ドラセナ
リュウケツジュはカナリア諸島原産の植物です。
The dragon tree is a plant native to the Canary Islands.
ドラセナ is the broader genus Dracaena, while リュウケツジュ refers specifically to Dracaena draco.
From the kanji 竜 (dragon), 血 (blood), and 樹 (tree), referring to the red resin that resembles dragon's blood.