# Plant Monograph: Cherry Bark
**Name of plant:**
Cherry Bark
**Catch phrase (Carmina Gadelica or traditional invocation if available):**
No Carmina Gadelica invocation is recorded for this North American plant. A traditional-style descriptive phrase is fitting: **“The bark that quiets the troubled breath.”**
**Family:**
Rosaceae — Rose family
**Genus and species:**
*Prunus serotina* Ehrh.
**Other names:**
Wild cherry bark, black cherry bark, wild black cherry, rum cherry, mountain black cherry, American black cherry, capulín, capolcuahuitl.
**Brief introduction:**
Wild cherry is a medium- to large-sized deciduous tree native to eastern and central North America, extending from Canada through the eastern United States and into Mexico. It is particularly characteristic of mixed hardwood forests, woodland margins, old fields, and disturbed ground. The tree produces fragrant white flowers followed by dark purple-black fruits. Its bark develops from smooth, reddish-brown young bark with prominent horizontal lenticels into dark, scaly mature bark.
The inner bark has a characteristic bitter-almond aroma and has long been used in North American herbal medicine, especially for coughs and irritated respiratory tissues. Its medicinal activity is associated partly with cyanogenic glycosides, particularly prunasin, which is also responsible for the plant's toxicological importance.
**Traditional uses:**
* Used traditionally to calm persistent or irritating coughs.
* Employed for bronchitis and other respiratory complaints.
* Used for sore or irritated throat and upper respiratory irritation.
* Traditionally used during colds, influenza, and other febrile respiratory illnesses.
* Used as a mild sedative and antispasmodic respiratory herb, particularly when coughing interferes with rest.
**Historical use:**
* Indigenous peoples of eastern North America used black cherry medicinally for respiratory and other ailments.
* European-American herbal traditions adopted the bark as a treatment for cough and respiratory irritation.
* Wild cherry became a common ingredient in nineteenth- and early twentieth-century cough syrups and patent medicines.
* The bark was valued as an aromatic expectorant, antitussive, astringent, and mild sedative.
* Black cherry also became an important commercial timber species, while its fruits were traditionally used in jellies, wines, and other preparations.
**Parts used and method of use:**
* Inner bark of young branches and twigs
* Occasionally the dried bark of smaller stems
Used as:
* Dried bark infusion or tea.
* Liquid extract or tincture.
* Syrup for cough preparations.
* Historically incorporated into compound cough remedies and respiratory formulas.
**Use in healing (modern herbal practice):**
* Traditionally used as an antitussive for dry, irritating cough.
* Used in herbal respiratory preparations for bronchial irritation.
* Used to soothe irritated throat tissues.
* Used as a mild antispasmodic when coughing occurs in spasms.
* Used in traditional herbal formulas for post-viral or lingering cough.
Evidence for these applications is primarily **traditional, pharmacognostic, and preclinical rather than supported by substantial modern clinical trials**.
**Pharmacology and biochemistry:**
* **Prunasin** — a principal cyanogenic glycoside of wild cherry.
* **Amygdalin** — another cyanogenic glycoside occurring in *Prunus* species.
* **Tannins and polyphenolic compounds** — contribute to the bark's astringent and antioxidant properties.
Mechanisms:
* Enzymatic hydrolysis of cyanogenic glycosides can produce benzaldehyde and hydrogen cyanide; at appropriately controlled medicinal concentrations, the traditional pharmacological effect has been associated with cough-suppressing and sedative activity.
* Tannins may contribute to an astringent effect on mucous membranes.
* Polyphenolic constituents demonstrate antioxidant and anti-inflammatory activity in experimental studies.
Overall profile:
Wild cherry bark is principally an **antitussive and respiratory-soothing herb**. Its traditional reputation is long-standing and pharmacologically plausible, but its cyanogenic chemistry means that it is not simply an innocuous soothing tea. The concentration of cyanogenic compounds can vary according to plant part, age, processing, and preparation.
**Common dosage:**
* **Dried bark infusion:** Approximately 4–10 g/day in traditional herbal practice, divided according to preparation.
* **Tincture:** Approximately 3–6 mL/day of a standardized preparation.
* **Liquid extract:** Dose according to the manufacturer's standardized preparation and cyanogenic-glycoside content.
* **Cough syrup:** Follow the manufacturer's standardized dosage; concentrated preparations should not be substituted with homemade high-strength extracts.
Because cyanogenic content varies substantially, **a professionally prepared and standardized product is preferable to estimating strength from wild-harvested bark**.
**Safety factors (including side effects):**
* Wild cherry bark contains cyanogenic glycosides capable of releasing hydrogen cyanide when enzymatically hydrolyzed.
* Excessive doses or improperly prepared concentrated extracts can cause cyanide toxicity, including headache, dizziness, weakness, nausea, confusion, respiratory difficulty, seizures, coma, and potentially death.
* Do not confuse medicinal bark with wilted leaves, damaged foliage, or crushed seeds, which can present substantially greater cyanogenic risk.
* Pregnancy, breastfeeding, significant liver disease, and use in young children warrant professional medical guidance before medicinal use.
* Long-term continuous internal use is inappropriate without professional supervision because safety data for prolonged exposure are limited.
**First aid / adverse reaction response:**
* **Mild nausea, headache, or dizziness after ingestion:** Stop use and seek medical advice, particularly if symptoms progress.
* **Weakness, confusion, rapid or difficult breathing, or unusual drowsiness:** Treat as possible cyanide poisoning and seek emergency medical care immediately.
* **Seizures, collapse, loss of consciousness, or respiratory failure:** Call emergency services immediately; this is a medical emergency.
* **Suspected significant ingestion of concentrated bark, extract, seeds, or damaged leaves:** Contact a poison centre or emergency service immediately rather than attempting to induce vomiting.
**Drug interactions:**
* Additive sedative effects are theoretically possible with sedative medications or other strongly sedating herbs.
* Caution is appropriate when combined with medications that suppress the cough reflex or respiratory drive.
* Because cyanogenic glycosides can release hydrogen cyanide, combining large amounts of wild cherry with other cyanogenic plants could theoretically increase toxicity.
* There is insufficient clinical interaction data to establish a comprehensive interaction profile; concentrated preparations should therefore be used cautiously with prescription medicines.
**Horticultural requirements:**
* **USDA / Canadian zone:** Approximately USDA Zones 3–9; native populations occur across much of eastern Canada, including New Brunswick, Nova Scotia, Ontario, and Quebec.
* **Soil pH:** Approximately 5.0–7.0; tolerates a broad range of soils but performs particularly well on moist, well-drained soils.
* **Light requirements:** Full sun to partial shade; seedlings tolerate shade, while established trees grow most vigorously with greater light availability.
* **Moisture:** Moderate; prefers moist, well-drained soils but tolerates a considerable range of conditions.
* **Other notes (growth habit, harvest timing, etc.):**
* **Growth habit:** Medium to large deciduous hardwood tree, potentially reaching 20–30 m or more under favorable conditions.
* **Flowering/fruiting:** Fragrant white flowers occur in elongated clusters in spring, followed by small dark cherries that mature in summer.
* **Harvest timing:** Medicinal bark is traditionally collected from young branches and twigs rather than extensively removing bark from mature trunks.
* **Habitat:** Mesic forests, woodland margins, old fields, disturbed ground, forest openings, and second-growth forests throughout eastern North America.
* **Propagation/cultivation notes:** Propagated primarily from seed. Moist seedbeds improve germination; seedlings tolerate shade initially but require greater light for vigorous subsequent growth. Established trees grow rapidly in favorable open conditions.
**Sampling of clinical reports / studies:**
* **Clinical evidence:** Modern clinical trials specifically evaluating wild cherry bark for cough are limited. Its continued medicinal use is principally based on traditional practice, historical pharmacopoeia, and pharmacological plausibility.
* **Pharmacological study:** Experimental research has examined *P. serotina* extracts for antioxidant, anti-inflammatory, antibacterial, and other biological activities, although these findings should not be equated with demonstrated clinical efficacy.
* **Phytochemical study:** Quantitative analysis has confirmed the presence of cyanogenic glycosides including prunasin and amygdalin in *P. serotina*.
* **Ethnobotanical evidence:** Black cherry has documented traditional medicinal use in North American and Mexican traditions, including respiratory, cardiovascular, and gastrointestinal applications.
* **Overall assessment of evidence:** Wild cherry bark has a strong traditional and historical basis as a cough-soothing herb, but modern clinical evidence is comparatively weak. Its pharmacology is complicated by the presence of cyanogenic glycosides, making correct identification, preparation, dose, and quality control particularly important. It belongs in the materia medica as a **traditional respiratory antitussive with meaningful toxicological cautions**, rather than as a casually prepared household tea.
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.