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Sempervivum calcareum
Scientific classification
Kingdom:	Plantae
Clade:	Tracheophytes
Clade:	Angiosperms
Clade:	Eudicots
Order:	Saxifragales
Family:	Crassulaceae
Genus:	Sempervivum
Species:	S. calcareum
Binomial name
Sempervivum calcareum Jord.
Synonyms
List Sempervivum californicum K.Koch Sempervivum columnare Jord. & Fourr. Sempervivum greenii Baker Sempervivum racemosum Jord. & Fourr. Sempervivum tectorum var. calcareum (Jord.) St.-Lag. Sempervivum tectorum subsp. calcareum (Jord.) Rouy & E.G.Camus Sempervivum tectorum var. columnare (Jord. & Fourr.) Rouy & E.G.Camus Sempervivum tectorum var. racemosum (Jord. & Fourr.) Rouy & E.G.Camus

Sempervivium calcareum, the houseleek, is a species of flowering plant in the stonecrop family Crassulaceae, native to the southern Alps in Europe. An evergreen succulent perennial, it has a rosette with thick leaves that store water. The leaves are usually green with reddish-purple tips. This plant reproduces with asexual budding and monocarpic sexual reproduction.

Sempervivum calcareum is cultivated as an ornamental garden plant. It is suitable for a well-drained spot in full sun, such as a rockery. The cultivars 'Extra', 'Guillaumes' and 'Sir William Lawrence' have gained the Royal Horticultural Society's Award of Garden Merit.

References

1. "Sempervivum calcareum Jord". Plants of the World Online. Royal Botanic Gardens, Kew. Retrieved 13 December 2024.
2. "Sempervivum calcareum". World of Succulents. 21 June 2016. Retrieved 9 November 2018.
3. "RHS Plantfinder - Sempervivum calcareum 'Extra'". Retrieved 9 November 2018.
4. "RHS Plantfinder - Sempervivum calcareum 'Guillaumes'". Retrieved 9 November 2018.
5. "Sempervivum calcareum 'Sir William Lawrence'". RHS. Retrieved 5 March 2021.
6. "AGM Plants - Ornamental" (PDF). Royal Horticultural Society. July 2017. p. 96. Retrieved 9 November 2018.

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