Witnessed by: TCM · Western · Unani
Scouring Rush (Equisetum hyemale), of the Equisetaceae family. Evergreen rush-like perennial of hollow, unbranched, jointed stems from a creeping rhizome; native range: Circumboreal — damp banks and wet woods across Eurasia and North America. Globally recognized as mu zei (木贼) in Chinese, zanab-ul-khail (ذنب الخيل) in Arabic, and rough horsetail, Dutch rush, pewterwort, shave-grass in English. The part used is aerial stem (whole herb). Rigid, ribbed, hollow green stems that snap cleanly at black-sheathed nodes; the surface is gritty to the tongue with embedded silica, faintly bitter, harsh and astringent.
In this cross-tradition database, we analyze how this substance operates across world medicine systems — tracking its traditional tastes, temperatures, tissue affinities, post-digestive effects, and planetary correspondences across Ayurveda, Unani, and Western herbalism.
SCOURING RUSH
IDENTITY
Name
- Common
- Scouring Rush
- Scientific name
- Equisetum hyemale L.
- Family
- Equisetaceae
Form
- Part used
- aerial stem (whole herb)
PROPERTIES
Nature
Taste
how the plant declares itself on the tongue
- TCM
- bitter · sweet
- Western
- astringent · bitter
- Unani
- astringent (qabid) · bland
Temperature
TCM: neutral (slightly cool)
Western: cool
Unani: cold (2nd degree)
convergence: all {witness_count} witnesses read it as cooling and drying — a mineral, styptic coolness
Affinity
where in the body it travels
Organs / channels
- TCM
- Lung · Liver
- Western
- kidneys · bladder · blood
- Unani
- kidneys · bladder
PRACTICE
Virtue
Actions
- TCM
- clears wind-heat, brightens the eyes and removes superficial visual obstruction (nebula/screens), cools the blood and stops bleeding
- Western
- astringent, styptic (haemostatic), diuretic, mildly vulnerary; a silica tonic to connective tissue
- Unani
- qabid (astringent), mudir-e-baul (diuretic), habis-ud-dam (styptic), mujaffif (desiccant); knits wounds and checks fluxes
Cautions
Contraindications: qi and blood deficiency without wind-heat (TCM); oedema arising from renal or cardiac insufficiency, where its diuresis is unsuitable; caution in the very dry and depleted given its drying nature
Toxicity: Equisetum species carry thiaminase; prolonged high intake can precipitate thiamine (B1) depletion. The toxic marsh horsetail (E. palustre) with its palustrine alkaloids must never be substituted or admixed.
Interactions
- Western
- diuretics: additive fluid and potassium loss with sustained use · antidiabetic agents: possible additive lowering of blood glucose
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