Lungwort (Pulmonaria officinalis): Botany, Tradition, and Fascinating Facts

Few native wild plants wear their name as visibly as lungwort. The white-spotted leaves, the early violet-blue flowers, and centuries of tradition make Pulmonaria officinalis a fascinating chapter in European plant history. In this guide, we take an objective look at the botany, at the historical tradition of use — including the doctrine of signatures — and at the known constituents, and place it all soberly in the context of current understanding. One important note up front: this article is exclusively about the plant lungwort — not about modern products that happen to sound similar.

Lungwort (Pulmonaria officinalis) is a native wild perennial from the borage family (Boraginaceae), recognizable by its characteristically white-spotted leaves. Its name comes from the historical doctrine of signatures, which inferred a use from the lung-shaped pattern on the leaves — a traditional belief, not scientific proof of any effect. Today, lungwort is regarded above all as a plant rich in tradition and botanically appealing.

Key Facts at a Glance

• Plant: Lungwort = Pulmonaria officinalis, a perennial wild herb in the borage family (Boraginaceae).
• Identifying features: the strikingly white-spotted, roughly hairy leaves and flowers that change color from pink to blue.
• Origin of the name: the doctrine of signatures — a historical belief, explicitly not proof of any effect.
• Constituents: traditionally documented components include mucilage, silica (silicon), flavonoids, and tannins.
• Safety: lungwort belongs to the Boraginaceae, a plant family that can contain pyrrolizidine alkaloids — look for PA-tested products.

Botany: How to Identify Pulmonaria officinalis

Common lungwort is a perennial herbaceous plant that usually grows 15 to 30 centimeters tall. It belongs to the borage family (Boraginaceae) — the same family as borage, comfrey, and forget-me-not. The German family name, Raublattgewächse (“rough-leaved plants”), says it all: the leaves and stems are covered in stiff little hairs and feel rough to the touch.

By far the most striking feature is the leaves themselves. They form a basal rosette, are heart- to egg-shaped, and carry the pattern that gives the plant its name: silvery-white spots on a deep green background. This mottling is no coincidence — it results from air-filled spaces within the leaf tissue that reflect light differently. Botanically speaking, the spotting varies from plant to plant, and for people in earlier centuries it was a memorable, unmistakable feature.

Another distinctive trait is the flower. Lungwort blooms very early in the year, often as soon as March and April, making it an important early food source for insects. Remarkably, the flowers change color as they develop — in bud and when young they appear reddish to pink, later shifting to violet and blue. This color change is linked to the pH value within the petals and gives the plant its colorful, varied appearance.

Lungwort’s natural home is in semi-shaded, humus-rich deciduous and riparian woodlands, where it often grows in small stands. It tolerates shady locations well, which also makes it a popular ornamental plant for naturalistic gardens. It is occasionally confused with other Pulmonaria species or garden cultivars that also have spotted leaves. For botanical identification, the combination of leaf shape, hairiness, flowering time, and flower color change is decisive — no single feature is enough on its own.

The Name and the Doctrine of Signatures

Why would a woodland plant be called “lungwort” of all things? The answer lies in a way of thinking that shaped European herbal knowledge for centuries: the doctrine of signatures. This idea, popularized in particular by Paracelsus in the 16th century, held that a plant’s outward form offered a clue to its possible use. People read the plant’s “signature” — its markings, color, or shape — like a form of natural handwriting.

In lungwort’s case, the pale spots on the leaves reminded people of the Renaissance of the image of a lung. From this visual resemblance, they drew an association and gave the plant the name it still carries today — even the Latin genus name Pulmonaria (from the Latin pulmo, meaning “lung”) stems from this idea.

One important point of context: the doctrine of signatures is a historical, symbolic belief and, from today’s perspective, is not proof of any effect whatsoever. A resemblance between a leaf pattern and an organ says nothing about pharmacological properties. The name is therefore a piece of cultural heritage, not a medical argument — a lovely example of how people in earlier times tried to interpret nature.

Traditional Use and Folklore

Lungwort appears throughout folklore and old herbal books across the centuries and was valued regionally as a wild herb. The young leaves were occasionally even used in the kitchen, for example added to wild salads or soups, though they were used somewhat sparingly because of their rough, hairy texture.

Traditionally, the plant was prepared mainly as an infusion — the dried herb was steeped in hot water and drunk as a tea. This preparation method remains the best known to this day. In tradition, lungwort thus stands alongside other classic wild herbs of spring. If you’re interested in the culinary and traditional side of native plants, our guide to sage offers another example of a plant rich in tradition and history.

We deliberately describe this tradition as cultural and historical knowledge. The fact that a plant was used historically does not establish any confirmed health effect. This distinction between tradition and proven benefit is precisely what matters for a serious, level-headed look at many old medicinal plants.

Known Constituents of Lungwort

From a botanical and phytochemical perspective, several groups of compounds found in lungwort are repeatedly mentioned in the literature. This list is purely descriptive and does not constitute a claim of effect:

• Mucilage: plant polysaccharides that swell in water. They are typical of many wild herbs and shape their texture.
• Silica (silicon): lungwort is among the plants with a notable content of silica, meaning silicon-containing compounds. You can learn more about this substance itself in our guide to silicon and silica.
• Flavonoids: secondary plant compounds found in many plants that belong to the polyphenol group.
• Tannins: astringent-tasting compounds responsible for the slightly bitter character of some plant preparations.

Flavonoids and other secondary plant compounds are an exciting field of research. If you want to understand the bigger picture, our overview of antioxidants and our article What Are Antioxidants? offer helpful context on these groups of compounds.

Scientific Context

For lungwort (Pulmonaria officinalis), no health claims are currently approved in the European Union. There are no proven or officially recognized effects that we could or would want to state here. We therefore describe lungwort consistently in an objective, neutral way: as a botanically interesting wild plant with a long cultural and historical tradition.

The historical doctrine of signatures that gave the herb its name is not, by current scientific understanding, proof of any effect — rather, it is a testament to how earlier generations interpreted nature. Likewise, simply listing constituents is not evidence of a health benefit. A guide like this one is intended for information purposes and does not replace medical or pharmaceutical advice. If you experience persistent symptoms — particularly involving the respiratory tract — please seek medical advice and have the cause properly clarified.

Safety Note: Pyrrolizidine Alkaloids (PAs)

One point deserves special attention. Lungwort belongs to the borage family (Boraginaceae), and in some species within this plant family, pyrrolizidine alkaloids (PAs) can occur. These are natural plant compounds that are viewed critically from a health perspective when consumed in higher amounts or over a prolonged period. Authorities such as Germany’s Federal Institute for Risk Assessment have been examining PAs in food and herbs for years.

In practical terms, this means: anyone working with lungwort or other Boraginaceae should rely exclusively on PA-tested products from a controlled source and should not use preparations continuously or without oversight. Using wild-harvested material without prior analysis is generally not advisable. Pregnant women, nursing mothers, and children should be especially cautious here. When in doubt, always have it clarified by a doctor.

Lungwort, Clearly Defined

Because many different terms circulate around the word “lung,” a clear distinction matters here. This guide deals exclusively with the plant lungwort (Pulmonaria officinalis) as a botanical and cultural-historical topic. It does not describe any specific product, nor other plants or blends that happen to carry similar names. If you’re interested in the broader topic of the respiratory tract and nutrition, our general overview of nutrients for the lungs and respiratory tract offers a neutral, objective perspective — deliberately separate from the plant presented here.

Matching Products from Scheunengut

In our range, you’ll find a dedicated Lungwort category, where we carry plant products rich in tradition. If you’re interested in other classic wild herbs, you’ll also find what you’re looking for in our Sage and Iceland Moss categories. All our plant-based products are lab-tested and, where relevant, checked for critical plant compounds.

Frequently Asked Questions (FAQ)

What is lungwort (Pulmonaria officinalis)?

Lungwort is a native, perennial wild herb from the borage family (Boraginaceae). It’s characterized by white-spotted, roughly hairy leaves and early-season flowers that shift from pink to blue. It is a plant of considerable botanical and cultural-historical interest.

Where does the name lungwort come from?

The name goes back to the historical doctrine of signatures. The pale spots on the leaves reminded people in earlier centuries of the image of a lung, which is why the plant was given this name. This is a traditional, symbolic belief and explicitly not scientific proof of any effect.

What constituents does lungwort contain?

The literature mentions mucilage, silica (silicon), flavonoids, and tannins, among other constituents, for lungwort. This listing is purely descriptive and does not constitute a health-related claim — no health claims are approved for lungwort in the EU.

What safety precautions should you keep in mind with lungwort?

Since lungwort belongs to the borage family, this plant family can contain pyrrolizidine alkaloids (PAs). You should therefore rely exclusively on PA-tested products from a controlled source and avoid using preparations continuously or without oversight. If symptoms persist, please have them clarified by a doctor.