Direct answer: Tree peony bark (牡丹皮, mǔdānpí) is the dried root bark of Paeonia suffruticosa, the tree peony (Paeoniaceae) native to China. It is a classical Chinese materia-medica part with a faint, rooty, earthy, woody scent. It is the root bark of the very same tree as the peony flower (牡丹) — same species, different part — and the two must be kept distinct.
Key facts
| Chinese | 牡丹皮 (mǔdānpí); the root bark of 牡丹 |
| Botanical source | Paeonia suffruticosa (family Paeoniaceae) — the root bark |
| What it is | The dried root bark of the tree peony, distinct from its flower |
| Aroma | Rooty, earthy, woody, faintly floral |
| Traditional role | Materia medica; same tree as tree peony flower (牡丹) |
Aroma profile
Direct answer: Tree peony bark has a quiet, rooty, earthy, woody scent with a faint, dry floral undertone — the muted aroma of a dried root bark, far less fragrant than the tree peony’s flower. It is a subtle material, famous in materia medica rather than in scent; in a blend it reads as a faint earthy-woody accent at most.
牡丹皮 has a quiet, rooty, earthy, woody scent with a faint, dry floral undertone — the muted aroma of a dried root bark, far less fragrant than the tree peony’s flower. It is a subtle material, its fame in materia medica rather than in scent; in an incense blend it reads as a faint earthy-woody accent at most. The contrast with its own flower is the point: the same tree produces a celebrated ornamental fragrance (the flower) and a quiet, earthy medicinal part (the bark), and the two are worlds apart in aromatic presence.
Botanical identity
Direct answer: Tree peony bark is the dried root bark of Paeonia suffruticosa (Paeoniaceae), the woody-stemmed tree peony native to China — the ancestor of the garden tree-peony cultivars. It is the same botanical identity as the flower (牡丹), but a different part: the root bark, not the blossom.
Paeonia suffruticosa is a woody-stemmed shrub peony (Paeoniaceae), native to China and the ancestor of the garden tree-peony cultivars. The tree peony is famous for its flower (牡丹); its root bark (牡丹皮) is a distinct materia-medica part. Flora of China records the species (牡丹); the same botanical identity underlies both the flower entry and this root-bark entry. See Paeonia suffruticosa in Flora of China and Paeonia suffruticosa on GBIF.
The “same species, different part” structure is the whole story of this entry. It is a reminder that a single botanical identity can yield materially different aromatic products depending on which part is used — a distinction that matters as much for sourcing as for fragrance.
Chinese name and terminology
Direct answer: 牡丹皮 means “tree peony bark” — tree peony (牡丹) + 皮 (bark/skin). The name is literal and functional: it specifies the part (the bark) of a specific plant (the tree peony). The Bencao Gangmu records the root as “肉白皮丹” — white flesh, red bark — which is exactly what gives 牡丹皮 its name.
The name 牡丹皮 (mǔdānpí) is a two-part specification: 牡丹 names the tree peony, and 皮 names the part — the bark. This is a clean example of how Chinese naming encodes both plant and part, which is precisely what prevents confusion with the flower. The Bencao Gangmu (本草纲目), 草之三, records the root as “肉白皮丹” — white flesh, red bark — and that red (丹) bark of the 牡丹 is the source of the name 牡丹皮. The name, then, is a part-specifier, and it does the disambiguation work that the shared species name alone cannot.
The tree peony bark (牡丹皮) / tree peony (牡丹) distinction (read this)
Direct answer: 牡丹皮 and 牡丹 come from the same tree, different parts: 牡丹皮 is the root bark, 牡丹 is the flower — the celebrated “king of flowers” (花王). The Bencao Gangmu records the tree under 牡丹 with the root bark as its materia-medica part, noting only the red single-petaled mountain flower’s root bark was preferred for medicine.
牡丹皮 and 牡丹 come from the same tree, different parts:
- tree peony bark (牡丹皮) — the dried root bark of Paeonia suffruticosa. This entry.
- tree peony (牡丹) — the flower of the same tree, the celebrated “king of flowers” (花王). Its own entry, at tree-peony.
The Bencao Gangmu (本草纲目), 草之三, records the tree under 牡丹, with the root bark as its materia-medica part — “根似芍藥，肉白皮丹” (the root resembles the peony’s, white flesh, red bark) — and notes that “惟山中單葉花紅者，根皮入藥爲佳” (only the red single-petaled mountain flower’s root bark is good for medicine). This page describes 牡丹皮 = the root bark, not the flower. The distinction is functional: the flower is a fragrance and ornamental subject, the bark is a quiet medicinal part.
Where does tree peony bark come from?
Direct answer: Tree peony bark comes from the roots of Paeonia suffruticosa, the tree peony grown across China — with the classical note that the root bark of the red single-petaled mountain form was preferred for medicine. The bark is a harvested root part, not a flower product.
The source is the tree peony itself, grown across China as both an ornamental and a medicinal plant. The classical record adds a sourcing nuance: “惟山中單葉花紅者，根皮入藥爲佳” — only the red single-petaled mountain flower’s root bark was considered best for medicine. This tells you two things: the medicinal bark was tied to a specific form (the mountain single-petaled red flower), and the part was valued from a plant that was also, separately, prized for its blossom. The bark and the flower are harvested from the same plant but belong to different markets.
Why is it (not) used in incense?
Direct answer: Tree peony bark is not a lead incense material. Its classical standing is in materia medica, and its root-bark scent is faint and earthy. It could lend a muted earthy note, but its fame rests on the materia-medica record, not on fragrance — the same tree’s flower, by contrast, is the fragrant part.
牡丹皮 occupies a position similar to several other materia-medica parts in this encyclopedia: aromatic in a muted way, but not a fragrance lead. Its root-bark scent is faint — earthy, woody, with a dry floral undertone — nothing like the celebrated fragrance of the flower it comes from. Its classical standing is in materia medica, not incense. The useful distinction to hold is that the same tree divides into a fragrant part (the flower, for ornamental and aromatic use) and a medicinal part (the bark) — and the bark is not a substitute for the flower in a fragrance context. See how incense is made for the materials that do enter the burning canon.
How is it processed?
Direct answer: Tree peony bark is processed by harvesting the root, stripping the bark, and drying it — the “肉白皮丹” part (the red bark over white flesh) being the materia-medica material. It is a root-bark harvest, not a flower or whole-root product.
The processing is a part-separation: the root is harvested, and the bark is stripped from the white flesh and dried. This is the “肉白皮丹” structure — white flesh, red bark — and the bark is the material. For the reader, the processing point is that 牡丹皮 is specifically the bark, not the whole root and not the flower; specifying the part is the whole identification task. It is dried whole or in pieces, and in incense use it would be a muted earthy accent, not a powder to build a formula around.
What determines quality?
Direct answer: Classical quality in tree peony bark was tied to source — the red single-petaled mountain flower’s root bark was preferred — and to the bark being properly stripped and dried. For a modern reader, the key checks are that it is the bark (not the flower or the whole root), and that it is clean and dry.
The quality points are:
- Part — it must be the root bark (牡丹皮), not the flower (牡丹) or the herbaceous peony root (芍药, Paeonia lactiflora).
- Source form — the classical preference was the red single-petaled mountain flower’s root bark.
- Cleanliness and dryness — properly stripped and dried bark, free of flesh and soil.
These are part-identification and preparation checks rather than aromatic grades, which is consistent with a material whose value is medicinal rather than fragrant.
Common forms
Direct answer: Tree peony bark is sold as dried bark pieces (whole or broken) and, for blending, as a powder. The bark piece is the identifying form; the powder is the rare incense-use form.
| Form | Typical use |
|---|---|
| Dried bark pieces | Storage, inspection, materia-medica use |
| Powder | Blending (rare; muted earthy accent) |
The forms are functional states of the same bark. Because its incense role is minimal, the powder is a niche form; the bark piece is the standard commodity.
In Chinese tradition
- Materia medica: 牡丹皮 is a classical Chinese materia-medica part, recorded in the Bencao Gangmu (本草纲目), 草之三, as the root bark (根皮) of 牡丹. This is traditional materia-medica language, not modern clinical evidence.
- Naming: the Bencao Gangmu notes “肉白皮丹” — white flesh, red bark — which is exactly what gives 牡丹皮 its name (the red “丹” bark of the 牡丹).
- Sourcing: classical texts record that the red single-petaled mountain flower’s root bark was preferred for medicine.
Traditional use vs modern evidence
Direct answer: The materia-medica record is traditional, not established clinical fact, and no medical claims are made. The documented, non-medical facts are botanical identity, the Paeoniaceae placement, and the root-bark distinction from the flower.
- Traditional Use — 牡丹皮 in Chinese materia medica, recorded in the Bencao Gangmu (本草纲目) 草之三 as the root bark of 牡丹. Traditional materia-medica language, not modern clinical evidence.
- Historical Record — the naming and sourcing record: “根似芍藥，肉白皮丹” (root like the peony’s, white flesh, red bark) and “惟山中單葉花紅者，根皮入藥爲佳” (the red single-petaled mountain flower’s root bark preferred for medicine).
- Scientific Evidence — botanical identity is established (Paeonia suffruticosa, Paeoniaceae). No clinical or medical efficacy claims are presented.
The documented, non-medical facts are botanical identity, the Paeoniaceae placement, and the root-bark distinction from the flower.
Safety
Incense combustion produces smoke and particulate matter. Burn in a well-ventilated space, avoid inhaling concentrated smoke, and keep away from children and pets. This is editorial knowledge content, not medical advice. See our safety guide.
Summary
Tree peony bark (牡丹皮, “tree peony bark”) is the dried root bark of Paeonia suffruticosa (Paeoniaceae), the same tree whose flower is 牡丹 — the “肉白皮丹” part (white flesh, red bark) that gives it its name. It is a classical materia-medica part with a faint, rooty, earthy scent, preferred in the classical record from the red single-petaled mountain form. Its defining point is part-specification: the flower and the bark are different products of the same tree, and the name 牡丹皮 encodes the distinction.
FAQ
What is tree peony bark (牡丹皮)? The dried root bark of Paeonia suffruticosa, the tree peony (Paeoniaceae) native to China. It has a faint, rooty, earthy, woody scent and is a classical Chinese materia-medica part — the root bark of the same tree whose flower is 牡丹.
Is tree peony bark (牡丹皮) the same as tree peony (牡丹)? No — same tree, different parts. 牡丹皮 is the root bark; 牡丹 is the flower, the “king of flowers” (花王). The Bencao Gangmu (本草纲目), 草之三, records the tree under 牡丹 with the root bark (根皮) as its materia-medica part.
Why is it called tree peony bark (牡丹皮)? The Bencao Gangmu records the root as “肉白皮丹” — white flesh, red bark. The red (丹) bark of the 牡丹 gives 牡丹皮 its name. Classical texts also note that the red single-petaled mountain flower’s root bark was preferred for medicine.
What does tree peony bark smell like? Quiet, rooty, earthy, and woody, with a faint, dry floral undertone — the muted aroma of a dried root bark. It is far less fragrant than the tree peony flower and reads as a subtle earthy-woody accent in a blend.
Is tree peony bark an incense ingredient? Not a lead one. Its classical standing is in materia medica, and its root-bark scent is faint. It could lend a muted earthy note, but its fame rests on the materia-medica record, not on fragrance.
Is tree peony bark the same as peony root (芍药)? No. 牡丹皮 is the root bark of the tree peony (Paeonia suffruticosa); 芍药 is the herbaceous peony (Paeonia lactiflora), a different species. They are distinct materia-medica parts from different plants, and the Bencao Gangmu records them separately.
See also: tree-peony (牡丹), peony (芍药), orris-root, how incense is made and the full scent guide.
Evidence & Sources
Botanical identity
Source: Paeonia suffruticosa in Flora of China · Paeonia suffruticosa on GBIF. Evidence type: Established.
Traditional Chinese use
Source: the Bencao Gangmu (本草纲目), 草之三, records 牡丹 with its root bark (根皮) as the materia-medica part (“根似芍藥，肉白皮丹”; “惟山中單葉花紅者，根皮入藥爲佳”). Evidence type: Historically documented — materia medica; medicinal uses are traditional, not modern clinical evidence.
Authenticity / disambiguation
Source: 牡丹皮 (root bark) vs 牡丹 (flower) — same tree, Paeonia suffruticosa, different parts. Evidence type: Practical screening.
Safety
Source: incense combustion produces smoke and particulate matter; burn in a well-ventilated space. Evidence type: Established.
Evidence status
| Layer | Status |
|---|---|
| Botanical identity | Established |
| Traditional use | Historically documented (materia medica) |
| Authenticity test | Practical screening |
| Health claims | Not established |
Sources
Sources: botanical references on Paeonia suffruticosa and the Bencao Gangmu (本草纲目) 草之三 record of 牡丹/牡丹皮. 牡丹皮 is documented as the root bark of the tree peony, distinct from the flower 牡丹; medicinal uses are treated as traditional, not established clinical fact. This is editorial knowledge content, not medical advice.