I · 不死草 The Undying Grass

原文：

有草名不死，割之复生，食之不老。

There is a grass called the Undying Grass. Cut it, and it grows back. Eat it, and you will never age.

The fantasy of a plant that defies death runs deep in Chinese alchemical thought. The Undying Grass is more than a botanical curiosity — it is the vegetable equivalent of the elixir of life, proof that immortality might be found in nature rather than in the furnace of the alchemist.

文化注释 Cultural Note The concept of 不死 (undying) plants appears throughout early Chinese texts. The Shanhaijing describes a mountain where such grasses grow. The Qin and Han emperors sent expeditions to find islands of immortals where these plants supposedly flourished. Zhang Hua records the belief but does not endorse it — characteristic of his encyclopedic stance between credulity and skepticism.

II · 指南树 The Compass Tree

原文：

指南树之叶，常指南方。枝叶所向，不随风转。

The leaves of the Compass Tree always point south. Its branches and foliage never turn with the wind.

A tree that defies the wind — a living compass embedded in the landscape. For travelers and geomancers alike, such a tree would be invaluable. The idea reflects the ancient Chinese fascination with orientation: south, not north, was the cardinal direction of power and clarity.

文化注释 Cultural Note While Zhang Hua's Compass Tree is mythical, the Chinese invention of the magnetic compass was closely related to directional lore. The sinan (司南), a lodestone spoon that pointed south, was described in Han dynasty texts. The boundary between botanical wonder and geomagnetic observation was, in Zhang Hua's world, delightfully blurry.

III · 相思木 The Acacia Wood of Longing

原文：

相思木，其枝随风而断，如人相思之苦。

The Acacia Wood — its branches snap in the wind, as though they know the bitterness of longing.

This is Zhang Hua at his most poetic: a tree whose physical fragility mirrors the emotional fragility of those who miss someone. The Chinese word xiangsi (相思) means both "mutual thought" and "lovesickness" — the tree is named for the disease it embodies.

文化注释 Cultural Note Xiangsi (相思) became one of the most loaded words in Chinese love poetry. Wang Wei's famous poem "Red Beans" (红豆) begins: "红豆生南国，春来发几枝。愿君多采撷，此物最相思" — "Red beans grow in the south, / In spring they sprout on a few branches. / Gather them, I pray you, / They are the very seeds of longing." The acacia tree and the red bean tree became intertwined symbols.

IV · 芸草 The Rue Herb

原文：

芸草辟蠹，藏书者用之。其香能透纸。

The Rue Herb repels bookworms. Those who store books use it. Its fragrance can penetrate paper itself.

A practical plant in a fantastical bestiary — Zhang Hua includes the Rue Herb because it serves the scholar's art. The herb's insect-repelling properties made it essential for library preservation, and "芸窗" (the rue window) became a metonym for the scholar's study.

文化注释 Cultural Note 芸香 (Ruta graveolens) was indeed used in Chinese libraries for centuries. The word 芸 became synonymous with books and learning: 芸编 means "books," 芸窗 means "study," and 芸馆 means "library." Zhang Hua, himself a great collector of books, would have known this herb intimately.

V · 梧桐 The Wutong Tree

原文：

梧桐知秋，一叶落而天下知秋。

The Wutong Tree knows autumn. When a single leaf falls, the whole world knows that autumn has come.

Not all of Zhang Hua's strange plants are exotic or distant. Some, like the Wutong, are remarkable for their sensitivity — a domestic tree whose seasonal awareness becomes a form of prophecy. The "first falling leaf" (一叶知秋) became a proverb for reading portents in small signs.