Leatherleaf Mahonia Stem

Chinese
功劳木
Pinyin
Gong Lao Mu
Latin
Caulis Mahoniae
Botanical illustration of Stem of Leatherleaf Mahonia, Berberis bealei, showing Gong Lao Mu stem material and diagnostic source details.
Botanical plate by Kodi .

Known in TCM as Gong Lao Mu (功劳木), this bitter, cold herb enters the Liver, Stomach, and Large Intestine. Traditionally, it clears heat and dries dampness ... Gong Lao Mu is used for damp-heat patterns with jaundice, diarrhea, or lower-body inflammatory discomfort, most often applied for hepatitis, dysentery, and toothache. Modern research has identified Protoberberine among its active constituents.

Part used: Stem

Also Known As

Caulis Mahoniae Mahonia stem Berberis bealei stem

Latin: Caulis Mahoniae | Pinyin: Gong Lao Mu | Chinese: 功劳木

TCM Properties

Taste
bitter
Temperature
cold
Channels
Liver, Stomach, Large Intestine

Traditional Use

Primary Actions

  • Clears heat and dries dampness ... Gong Lao Mu is used for damp-heat patterns with jaundice, diarrhea, or lower-body inflammatory discomfort.
  • Purges fire and relieves toxicity ... traditional use extends to sore throat, toothache, boils, and other heat-toxin presentations.
  • Has a regional liver-and-eye lane ... some local traditions use it when liver heat is accompanied by red swollen eyes or irritability.

Secondary Actions

  • This page stays on the stem-focused Caulis Mahoniae lane ... even though modern studies often sample root, stem, leaf, or isolated alkaloids together.
  • Recent taxonomy often places leatherleaf mahonia under Berberis bealei, but the medicinal trade lane still commonly uses the Mahonia naming tradition.

Classic Formulas

  • Damp-heat jaundice and dysentery modifications ... the herb is added when bitterness and coldness are wanted without turning to the strongest purgatives.
  • Heat-toxin external washes and powders ... a familiar traditional lane for boils, swollen gums, or inflamed skin.
  • Toothache and throat-pain combinations ... used when fire-toxin and damp-heat are both part of the picture.

Classical References

  • Traditional Chinese herb references describe Gong Lao Mu as a bitter cold stem that clears heat, dries dampness, and removes toxicity.
  • Its best-defined traditional identity is a heat-and-damp stem medicine rather than a general tonic shrub.

Modern Research

Active Compounds

  • Protoberberine alkaloids such as berberine, palmatine, and jatrorrhizine
  • Isotetrandrine and related isoquinoline alkaloids
  • Additional alkaloid-rich fractions studied from stem and root material

Studied Effects

  • A 2015 review of Mahonia species in traditional Chinese medicine summarized ethnopharmacology, phytochemistry, pharmacology, and toxicology, providing the best broad modern frame for Caulis Mahoniae (PMID 26387740).
  • A 2021 analysis compared alkaloids across different parts of Mahonia bealei and highlighted that stem material remains one of the key medicinally enriched parts of the plant (PMID 33650266).
  • A 2014 rat study reported that alkaloids from Mahonia bealei showed anti-H+/K+-ATPase and anti-gastrin effects in a gastric-ulcer model, supporting continued pharmacologic interest in the medicinal stem-and-root alkaloid fraction (PMID 25172799).

PubMed References

Safety & Interactions

Contraindications

  • Cold deficiency patterns without damp-heat or fire-toxin signs

Cautions

  • Modern pharmacology often reflects alkaloid-rich fractions from the broader Mahonia plant rather than one standardized stem-only product.
  • Because the herb is meaningfully bitter and cold, overuse can aggravate weak digestion.

Conditions

Frequently Asked Questions

What is Leatherleaf Mahonia Stem used for?

Leatherleaf Mahonia Stem is traditionally used to Clears heat and dries dampness ... Gong Lao Mu is used for damp-heat patterns with jaundice, diarrhea, or lower-body inflammatory discomfort., Purges fire and relieves toxicity ... traditional use extends to sore throat, toothache, boils, and other heat-toxin presentations., Has a regional liver-and-eye lane ... some local traditions use it when liver heat is accompanied by red swollen eyes or irritability.. Research has investigated its effects on: A 2015 review of Mahonia species in traditional Chinese medicine summarized ethnopharmacology, phytochemistry, pharmacology, and toxicology, providing the best broad modern frame for Caulis Mahoniae (PMID 26387740).; A 2021 analysis compared alkaloids across different parts of Mahonia bealei and highlighted that stem material remains one of the key medicinally enriched parts of the plant (PMID 33650266)..

What are other names for Leatherleaf Mahonia Stem?

Leatherleaf Mahonia Stem is also known as Caulis Mahoniae, Mahonia stem, Berberis bealei stem. In TCM: 功劳木 (Gong Lao Mu); Caulis Mahoniae.

Is Leatherleaf Mahonia Stem safe during pregnancy?

The safety of Leatherleaf Mahonia Stem during pregnancy has not been established. Consult a qualified healthcare provider before use.

What are the contraindications for Leatherleaf Mahonia Stem?

Leatherleaf Mahonia Stem should not be used in: Cold deficiency patterns without damp-heat or fire-toxin signs. Consult a qualified practitioner before use.