comfrey

comfrey /com·frey/ (kom´fre) the perennial herb Symphytum officinale, or a preparation of its leaves and roots, which are demulcent and astringent and are used topically for bruises and sprains and to promote bone healing; also used in folk medicine.

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comfrey,

n Latin name:
Symphytum officinale; parts used: leaves, roots; uses: wound healing, antiinflammatory for bruises and sprains; precautions: pregnancy, lactation, children; external use only; do not use for more than 6 weeks a year; can cause hepatotoxicity, nausea, liver adenoma. Also called
black root, blackwort, boneset, bruisewort, consound, gum plant, healing herb, knitback, knitbone, salsifly, slippery root, and
wallwort.

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comfrey

see symphytum.