The word "lingzhi" (靈芝) was first recorded in a "fu" (賦; "rhapsody; prose-poem") by the Han dynasty polymath Zhang Heng (CE) (Common Era) 78–139). His "Xijing fu" (西京賦) ("Western Metropolis Rhapsody") contains a description of the 104 BCE Jianzhang Palace of Emperor Wu of Han that parallels "lingzhi" with "shijun" (石菌; "rock mushroom"): "Raising huge breakers, lifting waves, That drenched the stone mushrooms on the high bank, And soaked the magic fungus on vermeil boughs." The commentary by Xue Zong (d. 237) notes that these fungi were eaten as drugs of immortality.