# Plant Monograph: Red Osier Dogwood
**Name of plant:**
Red Osier Dogwood
**Catch phrase (Carmina Gadelica or traditional invocation if available):**
No *Carmina Gadelica* or Gaelic invocation is specifically recorded for Red Osier Dogwood. Its medicinal tradition is principally Indigenous to North America, where the plant's red stems and flexible wood also gave it important practical and cultural uses.
**Family:**
Cornaceae — Dogwood family
**Genus and species:**
*Cornus sericea* L.
**Other names:**
Red Osier Dogwood; Red-twig Dogwood; Redstem Dogwood; Creek Dogwood; Western Dogwood; American Dogwood; Kinnikinnick; Swida sericea; *Cornus stolonifera* (historical synonym); *Cornus sericea* subsp. *sericea*
**Brief introduction:**
Red Osier Dogwood is a deciduous North American shrub recognized by its brilliant red to reddish-purple young branches, opposite leaves, clusters of small white flowers and white berries. It is native across much of Canada and the northern and western United States and is particularly characteristic of **wetlands, stream banks, lake margins and moist woodland**.
The species has considerable importance in Indigenous North American traditions. Bark, roots and twigs were used medicinally by a number of Indigenous peoples, particularly in preparations associated with fever, pain, diarrhoea and respiratory complaints. The flexible red stems were also used extensively for basketry, weaving, binding and other practical purposes.
The common name **"osier"** reflects this latter quality: the long flexible shoots resemble traditional willow osiers and can be woven into baskets and other objects.
**Traditional uses:**
* Bark and root preparations used traditionally for fever
* Decoctions used for diarrhoea and gastrointestinal complaints
* Traditional remedy for coughs, colds and respiratory complaints
* External preparations applied to wounds, sores and painful areas
* Bark preparations traditionally used for pain and inflammatory complaints
**Historical use:**
* Indigenous peoples used the bark, roots and twigs in medicinal decoctions and poultices
* Bark was traditionally employed as an astringent for diarrhoea and gastrointestinal disorders
* Red Osier Dogwood was used in various fever remedies
* Flexible young stems were woven into baskets, mats, fish traps and other useful objects
* Red stems and bark also had cultural and ceremonial uses among some Indigenous peoples
Traditional applications vary substantially among nations. They should therefore be attributed to particular cultural traditions rather than presented as a single universal Indigenous medicine.
**Parts used and method of use:**
* Inner bark
* Roots and young twigs
Used as:
* Decoction or infusion
* Poultice or external wash
* Bark preparation for traditional topical applications
* Dried bark or root used in compound traditional remedies
**Use in healing (modern herbal practice):**
* Traditional astringent for diarrhoea
* Traditional supportive remedy for feverish illnesses
* Traditional external treatment for minor wounds and skin complaints
* Traditional respiratory preparation for cough and cold
* Experimental investigation of antioxidant, antimicrobial and anti-inflammatory activity
Red Osier Dogwood is **not a major modern clinical herbal medicine**. Its importance today lies more strongly in ethnobotany, Indigenous plant knowledge, ecological restoration and experimental pharmacology.
**Pharmacology and biochemistry:**
* **Flavonoids and phenolic compounds** — including quercetin and related phenolics
* **Iridoid glycosides** — compounds characteristic of many Cornaceae species
* **Tannins and other polyphenols** — particularly relevant to the traditional astringent properties of the bark
Mechanisms:
* Tannins can bind proteins on mucosal and epithelial surfaces, producing an astringent effect
* Flavonoids and phenolic compounds exhibit antioxidant and anti-inflammatory activity in experimental systems
* Extracts of *Cornus sericea* demonstrate antimicrobial activity against selected microorganisms in laboratory studies
**Overall profile:**
Red Osier Dogwood is a **traditional North American astringent and topical medicinal plant**, with a chemistry dominated by polyphenols, flavonoids, tannins and iridoid compounds. Its traditional applications for diarrhoea, wounds, fever and inflammation have some pharmacological plausibility, but modern human clinical evidence is very limited.
**Common dosage:**
* **Dried inner bark, decoction:** Traditional preparations vary; no standardized modern medicinal dose established
* **Dried root bark, decoction:** Traditional preparations vary; no established evidence-based dosage
* **External bark wash:** Prepared as a concentrated decoction and applied topically
* **Poultice:** Fresh or prepared bark applied externally to affected areas
Because standardized clinical dosing has not been established, **specific internal doses should not be presented as evidence-based therapy**.
**Safety factors (including side effects):**
* Internal medicinal use is insufficiently studied to establish a reliable long-term safety profile
* Concentrated bark and root preparations may cause gastrointestinal irritation or other adverse effects
* Avoid medicinal internal use during pregnancy and lactation because adequate safety data are lacking
* People with known allergies to members of the Cornaceae family should discontinue use if an allergic reaction develops
* Long-term or high-dose internal use should be avoided in the absence of established safety and pharmacokinetic data
**First aid / adverse reaction response:**
* **Nausea, vomiting or abdominal discomfort:** Stop use, maintain hydration and seek medical advice if symptoms are severe or persistent
* **Diarrhoea following ingestion:** Discontinue the preparation and replace lost fluids and electrolytes
* **Skin irritation or dermatitis:** Remove the preparation and wash the affected area thoroughly
* **Breathing difficulty, facial swelling or widespread hives:** Seek emergency medical attention immediately
**Drug interactions:**
* No well-established clinical drug interactions have been documented
* High-tannin preparations may theoretically reduce absorption of some orally administered medicines when taken simultaneously
* Concentrated extracts may have pharmacological properties different from ordinary dietary or incidental exposure
* Because clinical pharmacokinetic information is lacking, people taking multiple prescription medicines should consult a pharmacist or physician before internal medicinal use
**Horticultural requirements:**
* **USDA / Canadian zone:** USDA **2–7**, depending on provenance; exceptionally cold hardy and well suited to much of Canada
* **Soil pH:** Approximately **5.0–7.5**
* **Light requirements:** Full sun to partial shade
* **Moisture:** Moist to wet; particularly well suited to consistently moist soils
* **Other notes (growth habit, harvest timing, etc.):**
* **Growth habit:** Deciduous, suckering shrub generally 1.5–3 m tall, sometimes larger; spreads through underground stems and readily forms colonies
* **Flowering/fruiting:** Small white flowers occur in flat-topped clusters in late spring to early summer; white berries develop in late summer and autumn
* **Harvest timing:** Young twigs and bark have traditionally been gathered when suitable material is available; sustainable harvesting should avoid girdling living stems
* **Habitat:** Wetlands, stream banks, lake margins, floodplains, wet meadows and moist woodland
* **Propagation/cultivation notes:** Easily propagated from hardwood cuttings, softwood cuttings or seed. It is particularly valuable for erosion control and riparian restoration because its extensive root system stabilizes soil.
**Sampling of clinical reports / studies:**
* **Clinical evidence:** There is little high-quality human clinical research specifically evaluating *Cornus sericea* as a medicinal plant.
* **Pharmacological studies:** Laboratory investigations of extracts and constituents have demonstrated antioxidant, antimicrobial and anti-inflammatory activities, providing experimental support for some traditional applications.
* **Phytochemical studies:** Bark and other tissues contain flavonoids, phenolic acids, tannins, iridoids and other secondary metabolites.
* **Ethnobotanical evidence:** Numerous Indigenous North American traditions document medicinal and material uses of Red Osier Dogwood, including applications for fever, gastrointestinal complaints, respiratory problems, wounds and pain.
* **Overall assessment of evidence:** **Ethnobotanical evidence: strong. Pharmacological evidence: preliminary to moderate. Clinical evidence: very limited.** Red Osier Dogwood is best regarded as an important Indigenous North American medicinal and material plant whose traditional knowledge deserves careful cultural attribution rather than as a well-established modern herbal drug.
**Botanical and cultural note:**
Red Osier Dogwood is an especially beautiful example of a plant whose **medicinal and material identities are inseparable**. The same flexible young stems that supplied basketry and binding material also carried medicinal knowledge in their bark. Its ecological preference for the margins of water—streams, marshes and lake shores—also makes it a valuable restoration plant. The vivid red winter stems give it an additional seasonal character: even after the leaves have fallen, the plant remains conspicuous against snow and dormant vegetation.
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.