# Plant Monograph: Peony
**Name of plant:**
Peony
**Catch phrase (Carmina Gadelica or traditional invocation if available):**
No Carmina Gadelica invocation specifically associated with Peony is known. In Chinese tradition, peony is strongly associated with **wealth, honour, beauty, and feminine grace**, and has been called the **“king of flowers” (花王)**. This is a cultural epithet rather than a surviving ritual invocation.
**Family:**
Paeoniaceae — the peony family
**Genus and species:**
*Paeonia* spp.
Important medicinal species include *Paeonia lactiflora* Pall. (Chinese peony) and *Paeonia veitchii* Lynch.
**Other names:**
* Peony
* Chinese peony
* White peony
* Common garden peony
* Tree peony — *Paeonia suffruticosa* group
* Red peony — *Paeonia veitchii* and related medicinal material
* Mudan (牡丹) — Chinese tree peony
* Shao yao (芍药) — Chinese peony, particularly *P. lactiflora*
* Bai shao (白芍) — “white peony,” traditionally referring to processed *P. lactiflora* root
* Chi shao (赤芍) — “red peony,” traditionally referring to red peony root
* Paeony
* Pivoine — French
**Brief introduction:**
Peonies are long-lived herbaceous or woody perennial plants renowned for their large, fragrant flowers. They are native primarily to Europe, Asia, and western North America, with the greatest diversity occurring in Eurasia. They have been cultivated ornamentally for centuries and hold particularly important cultural and medicinal roles in China.
Medicinal peony generally refers to the **root**, particularly the roots of *Paeonia lactiflora* and *Paeonia veitchii*. In Traditional Chinese Medicine, white peony root (*Bai Shao*) and red peony root (*Chi Shao*) are treated as distinct medicinal materials with different traditional indications. Peony contains monoterpene glycosides, especially **paeoniflorin**, which has become one of the principal phytochemical markers of medicinal peony.
**Traditional uses:**
* Peony root was traditionally used for painful menstrual disorders and menstrual irregularity
* Used traditionally for abdominal cramps and spasmodic pain
* Employed for muscle cramps and painful muscular tension
* Used in traditional Chinese medicine for inflammatory and “heat” conditions
* Traditionally used for nervous tension, irritability, and certain stress-related complaints
**Historical use:**
* Peony has been used medicinally in Chinese medicine for well over a millennium
* Classical Chinese materia medica distinguishes white and red peony roots according to processing, colour, and therapeutic application
* Greek and Roman medical traditions attributed medicinal properties to peony roots and seeds
* European herbal traditions employed peony for nervous disorders, convulsions, menstrual complaints, and digestive disturbances
* Peony seeds, roots, and flowers acquired numerous folkloric associations with protection, fertility, childbirth, and warding away harmful influences
**Parts used and method of use:**
* Root
* Seeds and flowers have historical medicinal and folkloric uses, but the root is the principal modern medicinal material
Used as:
* Decoction of dried root
* Powdered root
* Tincture or liquid extract
* Processed root preparations used in Traditional Chinese Medicine
**Use in healing (modern herbal practice):**
* Used traditionally for menstrual cramps and other gynecological discomfort
* Employed as an antispasmodic for muscular and abdominal cramping
* Used traditionally for inflammatory and painful conditions
* Investigated for effects on anxiety, neuroinflammation, and nervous-system activity
* Used in contemporary Chinese herbal practice as part of multi-herb formulas rather than commonly as a stand-alone medicine
**Pharmacology and biochemistry:**
* **Paeoniflorin** — the principal monoterpene glycoside and one of the best-characterized constituents of *P. lactiflora*
* **Paeonol** — a phenolic compound particularly associated with tree peony and red peony preparations
* **Oxypaeoniflorin and related monoterpene glycosides** — important constituents contributing to the pharmacological profile
Mechanisms:
* Paeoniflorin demonstrates antispasmodic and analgesic activity in experimental models and may modulate calcium-dependent smooth-muscle contraction
* Peony constituents influence inflammatory signalling pathways, including cytokines and NF-κB-related pathways
* Experimental research suggests effects on neurotransmitter systems and neuroinflammatory pathways, potentially contributing to anxiolytic and neuroprotective activity
Overall profile: Peony root has a substantial traditional medicinal history and a comparatively well-developed experimental literature. **Paeoniflorin** is particularly well studied and may contribute to analgesic, antispasmodic, anti-inflammatory, and neuroactive effects. Human clinical evidence is promising in some areas but remains insufficient for broad therapeutic claims.
**Common dosage:**
* **Dried root decoction:** approximately 6–15 g/day in traditional Chinese herbal practice, usually as part of a formula
* **Powdered root:** approximately 1.5–3 g per dose, according to the preparation and traditional indication
* **Tincture:** approximately 2–5 mL of a conventional tincture, up to three times daily; product concentration varies considerably
* **Standardized extract:** Follow the manufacturer's standardized dose; paeoniflorin content varies substantially between extracts
Traditional Chinese Medicine dosages are generally based on **decocted crude root and formula context** and should not automatically be applied to concentrated extracts.
**Safety factors (including side effects):**
* Peony root is generally considered relatively well tolerated at traditional doses, but gastrointestinal upset, nausea, dizziness, or fatigue may occur
* Because peony may influence platelet function and blood coagulation, caution is appropriate in people with bleeding disorders
* Avoid medicinal doses during pregnancy unless specifically prescribed by a qualified practitioner; safety data are inadequate and traditional formulations can contain multiple pharmacologically active herbs
* Allergic reactions are possible, particularly with concentrated extracts
* Long-term use of concentrated extracts has not been adequately characterized; traditional long-term use generally occurs within supervised multi-herb systems rather than unrestricted self-medication
**First aid / adverse reaction response:**
* **Mild nausea or gastrointestinal upset:** discontinue the preparation and monitor; seek advice if symptoms persist
* **Dizziness, marked weakness, or unusual sedation:** stop use and seek medical advice if significant or persistent
* **Unusual bruising or bleeding:** discontinue use and obtain medical assessment
* **Severe allergic reaction:** seek emergency medical care for facial swelling, difficulty breathing, widespread hives, or collapse
**Drug interactions:**
* May theoretically increase bleeding tendency when combined with **warfarin, aspirin, clopidogrel, heparin, or other anticoagulant/antiplatelet medicines**
* May potentially have additive effects with sedative or CNS-active medicines, although clinical evidence for significant interaction is limited
* Theoretical interactions with medicines affecting hepatic drug metabolism cannot be excluded because peony contains multiple bioactive constituents
* General interaction consideration: medicinal peony should be disclosed to healthcare providers before surgery or when multiple prescription medicines are being used
**Horticultural requirements:**
* **USDA / Canadian zone:** Approximately USDA Zones 3–8 for herbaceous peonies; some tree peonies perform well in Zones 4–8
* **Soil pH:** Approximately 6.5–7.0; slightly acidic to neutral, well-drained soil is preferred
* **Light requirements:** Full sun; partial shade can be tolerated but may reduce flowering
* **Moisture:** Moderate and consistent moisture with excellent drainage; avoid permanently waterlogged soil
* **Other notes (growth habit, harvest timing, etc.):**
* **Growth habit:** Long-lived herbaceous perennial, with some species and cultivars forming woody shrubs
* **Flowering/fruiting:** Large flowers generally appear in late spring to early summer; seed capsules develop later in the season
* **Harvest timing:** Medicinal roots are generally harvested from mature plants, often in autumn after aerial growth has begun to die back
* **Habitat:** Species occur in woodland margins, grasslands, rocky slopes, and temperate mountain habitats; cultivated varieties thrive in fertile garden soils
* **Propagation/cultivation notes:** Herbaceous peonies are commonly propagated by division of mature crowns. Seed propagation is possible but slow. Plants dislike being planted too deeply; buds should generally remain close to the soil surface. Good air circulation helps reduce fungal disease.
**Sampling of clinical reports / studies:**
* **Clinical study or report:** Clinical studies of *Paeonia lactiflora*, particularly paeoniflorin-containing preparations and traditional Chinese formulas, have investigated menstrual pain, inflammatory disorders, autoimmune conditions, and other complaints; evidence quality varies and many studies involve combination formulas
* **Pharmacological study:** Experimental research consistently demonstrates analgesic, antispasmodic, anti-inflammatory, immunomodulatory, and neuroactive effects associated particularly with paeoniflorin
* **Phytochemical study:** Chemical investigations have identified paeoniflorin, oxypaeoniflorin, albiflorin, paeonol, and numerous other monoterpene glycosides and phenolic compounds
* **Ethnobotanical evidence:** Peony has an exceptionally extensive medicinal history in Chinese medicine and a substantial but less continuous history in Greek, Roman, European, and Middle Eastern herbal traditions
* **Overall assessment of evidence:** **Strong traditional evidence, substantial phytochemical and pharmacological research, and moderate but still incomplete clinical evidence.** Peony root is considerably better supported as a traditional medicinal material than many plants in Western folk-herbalism, although the distinction between *Bai Shao*, *Chi Shao*, different *Paeonia* species, and multi-herb formulas is important when evaluating clinical evidence.
Educational Use Only: The information presented on this page is provided for educational, historical, and informational purposes only. ArdNemeton na Tuatha and Bhùth Draoi do not provide medical advice. Always consult your physician and pharmacist before using any herb, mushroom, supplement, or botanical product for medicinal purposes. Traditional uses described herein do not constitute medical claims.