《太平广记·卷四百零六·草木一（》
杨雄在《甘泉赋》中说 玉树菁葱 ，后左思以为假称珍，大概是对此树了解不详的原因。
杨子云《甘泉赋》云： 玉树菁葱。 后左思以为假称珍，盖未详也。
Yang Xiong said in "Ganquan Fu" that "Jade Trees are green and lush", but Zuo Si later thought it was a false name for a treasure, probably because he did not know much about this tree.