Fire-Flowers

"There is a cordial made of the juice of one of the Fire-Flowers that grow in the mountains of the sun. If you or any of your friends is hurt, a few drops of this restore them..."

Fire-Flowers are a kind of magical flowers that grew in the mountains of the sun. The juice from one of these flowers was used to make the healing cordial given to Lucy by Father Christmas, which heavily implies that the magic of these flowers could heal almost any wound or sickness (the properties of Lucy's cordial).