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The common house root is probably not poisonous
Is house root poisonous?
Many a Sempervivum lover may be guided by the Latin name of the house root, but it is translated as "everlasting". In fact, the house or rooftop has been used for many centuries as a healing and magical plant, a possible toxicity has not been proven to this day. However, this does not apply to each of the approximately 7000 different types of house root, but only to the widespread in this country Sempervivum tectorum (real or ordinary house root).
Traditional healing and magic plant
However, the house root is traditionally not eaten, but applied externally or as a tincture to insect bites, burns, wounds (even bleeding), ulcers, warts and hemorrhoids. All you have to do is cut open the leaves and place them with the moist side down on the treatment area. This is how the house root as well as the unrelated aloe vera is used, also has similar ingredients. The juice of the house root contains tannin, bitter, tannin and mucilage, formic and malic acid, ascorbic acid (vitamin C), potassium and resin.
Tips
Our ancestors planted the houseleek on their rooftops, because the plants donated to the god Donar (also known as Thor) were meant to protect the inhabitants of the house from lightning strikes.