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Sempervivum

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Sempervivum species are rosette-leafed succulents native to southern Europe; Sempervivum tectorum (houseleek) was customarily grown on slate roofs to ward off lightning.

At UBC Botanical Garden, Sempervivum and other related genera in Crassulaceae (including Jovibarba) are grown in a dry-stack (unmortared) wall for decorative purposes only. This collection was donated by Grace Rollerson (1921-1998), a locally renowned cactus and succulent enthusiast. Sempervivum (Greek: semper = always, vivum = alive) are hapaxanthic; i.e., individual rosettes die after flowering, but produce new vegetative offsets, which root and grow independently. These plants contain alkaloids, including nicotine, and extracts have been used for plant-pest control and (in people) for the treatment of inflammation.

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