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Stag's-horn clubmoss

Traditionally used for: Traditional dusting powder for chafed skin; Historical wound dusting; Traditional urinary and digestive remedy; Homeopathic remedy.

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What is Stag's-horn clubmoss? Stag's-horn clubmoss is a low, creeping evergreen plant of northern forests and heaths. Its botanical name is Lycopodium clavatum. In Norway it is myk kråkefot, in Sweden mattlummer, in Finland katinlieko and in Iceland jafni. It is not a true moss. Long trailing stems carry small scaly leaves and send up club-shaped cones. Those cones shed a fine yellow dust called lycopodium powder, which is the part most often sold. Nordic folk practice used the dust on sore skin and used the herb itself as a tea. Traditional use is not proof that a plant works, and it is not proof that it is safe. Human evidence for any medical use here is very thin. How does Stag's-horn clubmoss work? No mechanism for this plant has been proven in people. The spore powder acts in a plain physical way. It is dry, very fine and water-repellent. On skin it can soak up damp and cut rubbing between two surfaces. The green plant holds alkaloids, a group of strong plant chemicals. In test tubes and in animal work, clubmoss extracts have shown antioxidant activity. Some clubmoss alkaloids slow an enzyme that breaks down acetylcholine, a nerve signal chemical. Whether any of this happens in a person who swallows the herb is unknown. No trial has tested it. The same alkaloids are also the reason the herb is treated as risky. Homeopathic Lycopodium is diluted so far that little or no plant matter is left. There is no accepted way such a dilution could act in the body. What forms does Stag's-horn clubmoss come in? Most of what is sold is either raw spore powder or a homeopathic product. Spore powder is a fine, pale yellow dust. It has been used as a dusting powder, as a pill coating and in industry. Dried herb is sold by some suppliers as cut aerial parts for tea or tincture. This is the form that carries the alkaloids, and it is the form of most concern. Homeopathic Lycopodium comes as pills, granules or drops. These are made at high dilution and hold little or no measurable plant material. Stage and film crews also use the spores as a flash powder. That alone tells you how easily the dust ignites. Where it comes from: Clubmoss had a steady place in Nordic folk medicine and in older European herbals. Households gathered the ripe cones in late summer and shook out the dust. The powder was dusted on chafed skin, nappy rash and raw wounds. Apothecaries also used it to stop pills sticking to each other. The green herb was recorded for urine trouble, cramps and stomach complaints. Some records mention it for gout and aching joints. These uses passed down by habit, not by testing. From the 1800s Lycopodium became a leading homeopathic remedy. It was matched to digestive and liver symptom pictures. Those pictures came from provings, not from controlled trials. The plant is also slow-growing and protected or scarce in parts of Scandinavia. Wild picking is restricted in some areas.

Helps

What does Stag's-horn clubmoss help with? Chafed or damp skin (traditional dusting powder): Nordic folk use dusted the spore powder into sore, damp skin folds. The dust is dry and sheds water, so it can lower rubbing. No trial has tested it for this. Plain barrier creams and tested powders are better studied. Breathing the dust is a real risk, so this use is not advised at home. Wound dusting (historical practice, now discouraged): Older practice dusted the spores onto cuts and sores. Today this is seen as unwise. Powder left in a wound can trigger granulomas, which are small lumps of scar-like tissue. Similar problems were reported from powdered surgical gloves. There is no evidence the dust helps a wound heal. Urinary complaints (traditional, unproven): The herb was drunk as a tea for urine trouble and for stones. There is no human evidence that it helps. The alkaloids in the plant make swallowing it risky. Blood in your urine, fever or pain when passing urine needs a doctor, not a herb. Bloating and digestive complaints (homeopathic use, unproven): Lycopodium is one of the best known homeopathic remedies for wind, bloating and liver symptoms. The trials that exist are few, small and weak. Reviews find no reliable effect beyond placebo. Lasting belly pain, weight loss or yellow skin needs proper assessment. Gout and joint pain (folk use, unproven): Folk records mention clubmoss for gout and stiff, aching joints. No human study supports this. Gout has treatments that work well and that lower future attacks. Ask your doctor rather than testing a plant with known toxic alkaloids.

Stag's-horn clubmoss

Quick Facts

  • What it is: A northern forest clubmoss whose yellow spore dust was used in Nordic folk practice, and whose green plant holds toxic alkaloids.
  • Main uses: Traditional dusting powder for chafed skin, Historical wound dusting, Traditional urinary and digestive remedy, Homeopathic remedy
  • Active ingredients: Lycopodine, Clavatine, Clavatoxine, Trace huperzine A, Flavonoids, Triterpenes
  • Forms: Spore powder (lycopodium powder), Dried herb for tea or tincture, Homeopathic pills, granules or drops
  • Time to effect: Not established; the powder only dries skin on contact.
  • Side effects: Dust can irritate airways and skin; the green plant can poison if swallowed.
  • Pregnancy & breastfeeding: Avoid in pregnancy and while breastfeeding.

Educational information, not medical advice — ask your doctor or midwife.

What is Stag's-horn clubmoss?

Stag's-horn clubmoss is a low, creeping evergreen plant of northern forests and heaths. Its botanical name is Lycopodium clavatum. In Norway it is myk kråkefot, in Sweden mattlummer, in Finland katinlieko and in Iceland jafni.

It is not a true moss. Long trailing stems carry small scaly leaves and send up club-shaped cones. Those cones shed a fine yellow dust called lycopodium powder, which is the part most often sold.

Nordic folk practice used the dust on sore skin and used the herb itself as a tea. Traditional use is not proof that a plant works, and it is not proof that it is safe. Human evidence for any medical use here is very thin.

How does Stag's-horn clubmoss work?

No mechanism for this plant has been proven in people.

The spore powder acts in a plain physical way. It is dry, very fine and water-repellent. On skin it can soak up damp and cut rubbing between two surfaces.

The green plant holds alkaloids, a group of strong plant chemicals. In test tubes and in animal work, clubmoss extracts have shown antioxidant activity. Some clubmoss alkaloids slow an enzyme that breaks down acetylcholine, a nerve signal chemical.

Whether any of this happens in a person who swallows the herb is unknown. No trial has tested it. The same alkaloids are also the reason the herb is treated as risky.

Homeopathic Lycopodium is diluted so far that little or no plant matter is left. There is no accepted way such a dilution could act in the body.

What forms does Stag's-horn clubmoss come in?

Most of what is sold is either raw spore powder or a homeopathic product.

Spore powder is a fine, pale yellow dust. It has been used as a dusting powder, as a pill coating and in industry.

Dried herb is sold by some suppliers as cut aerial parts for tea or tincture. This is the form that carries the alkaloids, and it is the form of most concern.

Homeopathic Lycopodium comes as pills, granules or drops. These are made at high dilution and hold little or no measurable plant material.

Stage and film crews also use the spores as a flash powder. That alone tells you how easily the dust ignites.

Where it comes from:

Clubmoss had a steady place in Nordic folk medicine and in older European herbals.

Households gathered the ripe cones in late summer and shook out the dust. The powder was dusted on chafed skin, nappy rash and raw wounds. Apothecaries also used it to stop pills sticking to each other.

The green herb was recorded for urine trouble, cramps and stomach complaints. Some records mention it for gout and aching joints. These uses passed down by habit, not by testing.

From the 1800s Lycopodium became a leading homeopathic remedy. It was matched to digestive and liver symptom pictures. Those pictures came from provings, not from controlled trials.

The plant is also slow-growing and protected or scarce in parts of Scandinavia. Wild picking is restricted in some areas.

Who should avoid Stag's-horn clubmoss?

  • Never swallow the green plant, its tea or its tincture; it holds alkaloids reported as toxic.
  • Never give any form of this plant to a child by mouth.
  • Do not breathe in the spore powder, and do not use it in an unventilated room.
  • Do not put the powder into an open wound, cut, burn, nose, eye or any body cavity.
  • Do not dust the powder on a baby, and never near a baby's face.
  • Do not use any form of this plant if you are pregnant or trying to conceive.
  • Do not use any form of this plant if you are breastfeeding.
  • Avoid the dust completely if you have asthma or COPD (a long-term lung disease).
  • Do not use the powder near a flame, hotplate, candle or heat source; the dust flares.
  • Do not use it again if it has ever given you a rash, cough or wheeze.
  • Do not use it if you have liver disease, kidney disease or epilepsy (a seizure disorder).
  • Never use it in place of prescribed medicine for urinary, liver or joint disease.

When should you see a doctor?

If someone has swallowed the green plant, treat it as a poisoning. Ring your national poison centre now, even if they feel fine.

Call emergency services if you see any of these:

- trouble breathing, wheeze or noisy breathing - swelling of the lips, tongue, face or throat - repeated vomiting or severe belly pain - confusion, severe dizziness or collapse - a seizure (fit) - a burn from ignited dust

See your doctor within a day for a spreading rash, a cough that will not settle, or any lump that forms where powder touched broken skin. Take the product packet with you.

Is Stag's-horn clubmoss legal where you live?

In the Nordic countries and the wider EU, no clubmoss herbal medicine holds an approved licence, and the EU herbal committee has issued no monograph for it. Lycopodium spore powder is still traded for industrial, cosmetic and pyrotechnic use, and homeopathic Lycopodium is sold as a registered homeopathic product. In the United States it appears as a dietary supplement and as an over-the-counter homeopathic item, with no safety or effect review before sale.

Options to discuss with a clinician

Do not swap one remedy for another on your own. Take these options to your doctor or pharmacist first.

For chafed or damp skin, ask about zinc oxide barrier creams or tested medical skin powders. For urinary symptoms, ask for a urine test; infections and stones need proper care.

For bloating and gut symptoms, ask about peppermint oil capsules or diet review, both of which have real human evidence. For gout, ask about proven drugs that cut attacks.

If you want to keep working with plants, ask your doctor or pharmacist to check any herb against your current medicines.

Graded pages for the options named above:

Evidence grades and traditional-use labels are explained in our methodology. Nothing here is medical advice.

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