Sempervivum tectorum

Sempervivum tectorum Almindelig Husløg

Sempervivum tectorum (diameter 15 cm)

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Bicknell Sempervivuim June 2020

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Sempervivum Tectorum Greenii, Huntington

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Sempervivum tectorum boutignyanum-1

Sempervivum tectorum (1) 1 (ex Pyrenees)

Sempervivum tectorum, commonly known as houseleek, is a species of flowering plant in the family Crassulaceae. It is native to the mountains of southern Europe and is widely cultivated in gardens and on rooftops. The name Sempervivum comes from the Latin words semper (always) and vivus (living), reflecting the plant's hardy and perennial nature. Tectorum means "of roofs", indicating its common use in traditional green roofs.

Description

Sempervivum tectorum is a succulent plant that forms mats of rosettes. The rosettes are composed of thick, fleshy leaves that are green, sometimes with red tips. The leaves are adapted to store water, allowing the plant to survive in dry conditions. Sempervivum tectorum flowers in the summer, producing star-shaped, pink or red flowers on tall, stalk-like inflorescences. After flowering, the rosette dies, but the plant produces offsets (pups) that continue to grow and spread.

Cultivation and Uses

Sempervivum tectorum is valued for its ornamental qualities and its ability to thrive in poor soils and harsh growing conditions. It is often used in rock gardens, as ground cover, and in green roofing, where its drought tolerance and low maintenance requirements are particularly beneficial. The plant prefers full sun to partial shade and well-drained soil. It is frost hardy and can survive in temperatures as low as -30°C (-22°F).

In addition to its ornamental use, Sempervivum tectorum has a history of traditional use in folk medicine. It has been used to treat a variety of ailments, including skin conditions and inflammations. The leaves can be applied topically as a poultice to soothe minor burns, insect bites, and skin irritations.

Ecology

Sempervivum tectorum plays a role in its ecosystem by providing nectar and pollen for pollinators such as bees and butterflies. Its ability to grow in poor soils also helps to prevent soil erosion in vulnerable areas.

Conservation

While Sempervivum tectorum is not currently listed as endangered, its natural habitats are threatened by human activities such as agriculture and urbanization. Conservation efforts are important to preserve these habitats and the biodiversity they support.

Gallery

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See Also

• Succulent plant
• Crassulaceae
• Green roof