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Sphagnum—the bog moss, growing in dense carpets in wetlands—was most medically valuable moss species.
The Absorbency:
Sphagnum could absorb twenty times its weight in fluid—far more than cotton or linen. This made it ideal wound dressing, soaking up blood and seepage, keeping wounds clean, preventing infection.
The moss was collected from bogs, cleaned (removing debris and insects), dried partially (it worked better damp), then applied directly to wounds. As it absorbed fluid, fresh moss replaced saturated moss, maintaining clean, dry wound environment.
The Antiseptic Property:
Sphagnum contained compounds that inhibited bacterial growth. Wounds dressed with sphagnum moss developed fewer infections than wounds treated with other materials. The mechanism was unknown to Celtic healers, but the effect was observed, tested, relied upon.
Modern analysis reveals sphagnum produces phenolic compounds with genuine antibacterial activity—the Celtic usage was empirically correct, validated by chemistry millennia later.
The Surgical Application:
For deep wounds, sphagnum was packed inside—filling the wound cavity, absorbing internal bleeding, preventing infection from within. This was crude surgery, but effective when proper surgical facilities were unavailable.
The moss was removed carefully once healing began—new tissue grew around it, and extraction required gentleness to avoid damaging fragile healing tissue.
The Continued Use:
Sphagnum moss saw medical use through World Wars I and II—when bandage supplies were insufficient, sphagnum was collected, sterilized, and used to dress wounds. The ancient Celtic remedy proved valuable in modern warfare.
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