Catalpa bignonioides — Tincture: Catalpa

The cigar tree of Southern folk medicine — a liquid extract from a forgotten respiratory ally.

Botanical Identification

Species: Catalpa bignonioides Walt.
Family: Bignoniaceae (Trumpet Creeper family)
Common Names: Southern Catalpa, Indian Bean Tree, Cigar Tree, Catawba, Fish Bait Tree
Parts Used in Tincture: Bark, leaves, and/or seed pods (varies by tradition; bark is most common for respiratory preparations)
Extract Type: Hydroethanolic tincture (liquid extract in alcohol and water)
Native Range: Southeastern United States, from Mississippi to Florida and north to Georgia; widely planted and naturalized across the eastern U.S.
Botanical Description: A medium-sized, spreading deciduous tree growing 25–40 feet tall with a broad, irregular crown. The leaves are among the largest of any native North American tree — heart-shaped, 6–12 inches long, light green, and softly hairy beneath. Showy panicles of white, bell-shaped flowers with purple and yellow interior markings appear in late spring, followed by the tree's most distinctive feature: long, slender seed pods (8–20 inches) resembling cigars, which persist through winter. The bark is thin, gray-brown, and develops shallow furrows with age.

Cultural and Historical Use

Catalpa holds a quiet but significant place in the folk medicine traditions of the American South and among several Native American nations. The Cherokee used catalpa bark preparations for a variety of respiratory conditions, including asthma, whooping cough, and chronic bronchial complaints. The Catawba people — from whom the tree's common name likely derives — employed decoctions of the bark and seed pods for similar purposes. Creek and other Southeastern nations also included catalpa in their materia medica.

In 19th-century American Eclectic medicine, catalpa bark gained recognition as a mild sedative and antispasmodic with particular affinity for the respiratory tract. Eclectic physicians prescribed it for spasmodic asthma, paroxysmal cough, and bronchial irritability. King's American Dispensatory (1898) describes catalpa as "antispasmodic, useful in asthma, and in nervous, spasmodic affections of the bronchial tubes." The preparation was typically a tincture or fluid extract of the inner bark.

In Appalachian folk medicine, catalpa bark tea and tinctures persisted well into the 20th century as household remedies for breathing difficulties, particularly among rural communities without easy access to conventional medicine. The tree was also widely planted as a source of durable fence posts and as habitat for catalpa sphinx moth caterpillars, which are prized as fishing bait — earning the tree its common name "fish bait tree."

Key Bioactive Compounds

Note on research: Catalpa is an under-studied tree in modern pharmacology. The iridoid glycosides — catalposide and catalpol — are the most investigated compounds, with recent research emerging primarily from studies on related species such as Catalpa ovata and from the broader iridoid literature. Much of our understanding of catalpa's respiratory actions remains rooted in Eclectic and ethnobotanical documentation rather than clinical trials.

How It Works in the Body

The respiratory-specific reputation of catalpa tincture likely arises from a convergence of its antispasmodic, anti-inflammatory, and mild sedative properties. The iridoid glycosides (catalposide and catalpol) have demonstrated anti-inflammatory effects in laboratory studies, inhibiting pro-inflammatory mediators including TNF-alpha, IL-6, and nitric oxide. These compounds may reduce bronchial inflammation and swelling that contribute to airway constriction in asthmatic and bronchitic conditions.

The antispasmodic action described by Eclectic physicians — relaxation of bronchial smooth muscle during asthma attacks and spasmodic coughing fits — aligns with the known pharmacology of certain iridoid glycosides and triterpenes, which can modulate smooth muscle contractility. Ursolic acid, present in catalpa bark, has shown bronchodilatory effects in preclinical models.

The tannin content provides astringent effects on irritated mucous membranes, tightening inflamed tissues and reducing excessive mucus secretion. This astringent action, combined with the anti-inflammatory effects of the iridoids, may explain catalpa's traditional use for chronic, weeping respiratory conditions where excessive mucus production is a primary complaint.

As a tincture, these compounds are extracted into a hydroethanolic solution that allows for rapid sublingual and gastrointestinal absorption. The alcohol menstruum effectively captures both water-soluble glycosides and alcohol-soluble terpenoids, producing a full-spectrum extract.

Dose Guidelines

Important: These doses reflect historical Eclectic and folk medicine usage. Catalpa lacks modern clinical dosing studies. Start with the lower end of the range and adjust based on individual response. This tincture is intended as a supportive remedy, not a replacement for prescribed asthma or respiratory medications.

Preparation and Uses

• Direct tincture dosing: Add 15–30 drops to 1–2 oz of water and drink. May also be taken directly under the tongue for faster absorption, though the taste is bitter and astringent. Best taken between meals for respiratory support.
• In combination formulas: Catalpa tincture blends well with other respiratory herbs. Traditional combinations include catalpa with mullein (Verbascum thapsus) for chronic cough, with lobelia (Lobelia inflata) for bronchospasm, or with elecampane (Inula helenium) for deep bronchial congestion. Combine equal parts or adjust ratios to emphasize the desired action.
• Added to tea: Stir 15–30 drops of tincture into a cup of warm (not boiling) herbal tea for combined benefits. Thyme, peppermint, or marshmallow root tea are complementary bases.
• Throat coat: Mix tincture drops into a tablespoon of honey and take slowly, allowing the mixture to coat the throat. Useful for dry, spasmodic cough.

Optimal Context for Use

Catalpa tincture occupies a niche position in the modern herbalist's toolkit — it is a respiratory antispasmodic from the American folk tradition, best suited for situations involving spasmodic or reactive airway symptoms: tight, dry coughs; wheezing; bronchial constriction triggered by cold air, allergens, or exercise; and the lingering spasmodic cough that follows respiratory infections. It is not a first-line herb for acute infection (thyme, oregano, and elderberry are better suited there) but rather a supportive herb for the pattern of bronchial irritability and hyperreactivity.

This tincture is ideal for herbalists and informed individuals who appreciate the Eclectic and Native American traditions and want access to botanicals outside the mainstream commercial repertoire. It pairs well with more widely known respiratory herbs as part of a multi-herb approach.

Sustainability and Ethical Harvesting

Southern catalpa is abundant throughout the eastern United States, commonly planted as an ornamental shade tree and thoroughly naturalized beyond its original Southeastern range. It is not a species of conservation concern. The tree is fast-growing, prolific in seed production, and tolerant of a wide range of soil and moisture conditions. Bark harvesting should follow ethical wildcrafting practices: harvest from pruned limbs or fallen branches rather than girdling live trees, and never remove more than a small percentage of bark from any individual tree. Leaf and pod collection has minimal impact on tree health when done in moderation.

Safety and Cautions

• Limited safety data: Catalpa has not been evaluated by the FDA, EMA, or other regulatory bodies for safety or efficacy. It is sold as a traditional botanical preparation, and its use is based on historical precedent rather than clinical evidence.
• Pregnancy and breastfeeding: Not recommended due to insufficient safety data. The antispasmodic properties suggest potential effects on smooth muscle that warrant caution.
• Children: Use only under the guidance of a qualified herbalist or healthcare provider experienced with pediatric botanical medicine.
• Asthma: While catalpa has been traditionally used for asthmatic symptoms, it should never replace prescribed asthma medications such as rescue inhalers or maintenance controllers. Asthma can be life-threatening, and any botanical support should be used as an adjunct, not a substitute, with the knowledge of your healthcare provider.
• Drug interactions: No specific interactions have been documented in clinical literature. However, the mild sedative properties described historically suggest caution when combining with CNS depressants, including sedative medications and alcohol (beyond the tincture's own alcohol content).
• Allergic reactions: As with any botanical product, discontinue use if any signs of allergic reaction develop, including rash, hives, swelling, or difficulty breathing.
• Contains alcohol: This is an alcohol-based extract. Individuals avoiding alcohol for medical, religious, or personal reasons should be aware of the ethanol content.

References

• Felter, H.W. and Lloyd, J.U. (1898). King's American Dispensatory. 18th edition. Ohio Valley Company.
• Moerman, D.E. (1998). Native American Ethnobotany. Timber Press.
• Kwak, J.H., et al. (2009). "Anti-inflammatory effect of catalposide isolated from Catalpa ovata in LPS-stimulated murine macrophages." Archives of Pharmacal Research, 32(4), 561-567.
• Bi, J., et al. (2012). "Catalpol protects mesencephalic neurons against MPTP-induced neurotoxicity via attenuation of mitochondrial dysfunction." Neuroscience Letters, 524(1), 1-6.
• Ellingwood, F. (1919). The American Materia Medica, Therapeutics, and Pharmacognosy. Ellingwood's Therapeutist.

Final Note

Catalpa is an herb that rewards the curious. It stands outside the well-trodden paths of commercial herbalism, rooted instead in the lived experience of Cherokee healers, Eclectic physicians, and Appalachian grandmothers who recognized that the cigar tree in the yard was also the cough remedy on the shelf. This tincture is a bridge to that tradition — a concentrated liquid extract of a tree whose medicinal qualities deserve more attention than they currently receive. If you struggle with reactive airways, spasmodic coughs, or bronchial tightness, catalpa may offer a gentle, supportive hand alongside your existing respiratory care plan.