Wormwood

Lore & Background

In the pharmacological tradition of the series' empire, wormwood is catalogued alongside a constellation of Artemisia relatives—mugwort, sweet wormwood, tansy—each with a slightly different ratio of sesquiterpene lactones and therefore a slightly different therapeutic or toxic profile. Maomao's training, inherited through generations of apothecary work in the outer provinces, gives her an almost preternatural ability to distinguish a therapeutic tincture of wormwood from a concentrated thujone extract meant to poison. The difference, she notes, is often nothing more than the solvent, the steeping time, and whether the volatile oils are driven off or preserved.

The substance's cultural footprint in the palace is layered. Common attendants and kitchen workers use a mild wormwood infusion to settle stomachs after rich banquet courses. Alchemists in the imperial workshop distill its oils for perfumery and for certain anodyne preparations. But the same plant, rendered into a concentrated tincture or ground into a fine powder and folded into a spice blend, becomes a poison that leaves no obvious wound, no discoloration of the flesh, and no single traceable source. The victim simply begins to see wrong, to hear wrong, to lose the thread of their own identity—by the time anyone suspects foul play, the neurological damage may already be irreversible.

Maomao's approach to wormwood cases is characteristically methodical: she isolates the compound from the victim's vomitus or from a suspect's kitchen stores, confirms the thujone content through a series of qualitative reactions (color shifts with specific reagents, crystallization patterns), and then works backward to reconstruct the preparation. Her antidote strategy typically centers on accelerating hepatic clearance, binding residual thujone in the gut with activated charcoal or a specific mineral salt, and—critically—managing the seizure risk with a sedative compound that does not itself depress respiration. She treats the mind as the organ being poisoned, not the liver or the heart, which sets her approach apart from the palace physicians who default to blood-purging regimens.

In Their Own Story

The lamp in the apothecary's back room had burned down to a stub of tallow, its smoke curling into the rafters like a slow question. Maomao held the porcelain vial up to the guttering flame and tilted it, watching the pale green liquid catch the light. It smelled of a field after rain—green, sharp, faintly metallic at the back of the throat. She uncorked it, let a single drop fall onto the tip of her tongue, and waited.

The bitterness bloomed. Then the edges of the room went soft, the wooden shelves stretching into long, wavering corridors that hadn't been there a moment ago. She blinked, and they were shelves again, but her hands were trembling in a way she didn't like.

"Three drops," she murmured to no one, scratching a line in her ledger. "A child's teaspoon of this tincture, and the world starts to argue with itself." She corked the vial, set it in the iron tray with the others, and rubbed her eyes until she saw stars that were, thank the gods, only stars. Outside, the palace bells marked the hour, and the night settled back into its proper, unarguing shape.

Reader's Guide

In-world name: Ku-ai (苦艾), colloquially "bitter ghost-leaf" in the outer provinces. Botanical origin: Artemisia species, distinguished from mugwort (Artemisia vulgaris) and sweet wormwood (Artemisia annua) by the higher concentration of α- and β-thujone in the aerial parts. Preparation and concealment: In its medicinal form, dried leaves are steeped briefly in hot water and the infusion drunk warm; the thujone is largely driven off by the heat. As a poison, the volatile oil is distilled or the leaves are ground into a fine, pale-green powder that dissolves invisibly in sugar, honey, or a spice blend, preserving the thujone intact. A tincture in rice-bran wine or a neutral spirit is the most common delivery vector in the palace, as the alcohol stabilizes the compound and masks the bitter taste.

Symptom timeline: Onset (30 min – 2 hr post-ingestion): mild euphoria, heightened sensitivity to light and sound, a faint metallic taste, slight nystagmus. Peak (2 – 6 hr): vivid visual and auditory hallucinations, spatial disorientation, involuntary myoclonic jerks, progressive confusion and personality dissociation. Terminal / irreversible phase (6 – 48 hr): generalized tonic-clonic seizures, loss of higher cortical function, respiratory compromise secondary to aspiration or prolonged convulsion; death, if it occurs, is from status epilepticus rather than direct organ failure.

Maomao's treatment: Immediate gastric lavage or induced emesis if within the first hour; activated charcoal or a calcium-salt binder to sequester unabsorbed thujone; a carefully dosed sedative (often a valerian- and scutellaria-based preparation) to control seizure activity without respiratory depression; supportive fluid and electrolyte management; and, in the days following, a gentle hepatic tonic to aid metabolic clearance. She explicitly warns against the palace physicians' default of blood-letting, which she argues worsens the neurological deficit.

Arc placement: Wormwood surfaces as a recurring pharmacological reference in Maomao's identification work. It is not a single-arc MacGuffin but a substance she encounters in multiple contexts—diagnosing a kitchen worker's mysterious "fever of the eyes," analyzing a suspect's apothecary stores, and cross-referencing a victim's symptoms against a differential that includes aconite and belladonna. It functions as a recurring tool in her diagnostic vocabulary rather than the centerpiece of one standalone case.

Did You Know?

• Thujone, wormwood's principal neurotoxin, was historically the compound behind the legend that absinthe drinkers saw 'the worm'—a hallucinatory distortion of visual processing rather than any literal creature.
• In the series' pharmacological tradition, wormwood and mugwort are treated as distinct substances with different therapeutic profiles; confusing the two is a classic error Maomao uses to test junior apothecaries.
• Maomao's identification of thujone-containing preparations relies on a qualitative colorimetric reaction with a specific metal salt—a test she performs with the same casual precision she uses to check a soup for arsenic.
• The series' depiction of wormwood's dual identity—stomach-settling tea by day, slow poison by night—mirrors the real historical ambiguity of Artemisia species in both traditional Chinese and European herbal medicine, whe