English: dolomite Houseleek; Houseleek of the
Dolomites.
Synonyms: sempervivum lehmannii; Sempervivum oligotrichum;
Sempervivum tectorum var. angustifolium.
Region: dolomites, Austria, northern Italy.
Habitat: in rock cracks or stony slopes; elevations ranging from 1,600 to 2,500 m; prefers full sun, appreciate some afternoon shade; unsuitable for indoor growing because lack of sunlight; well-draining soil mix with 25 to 50 % sand, gravel, and perlite or pumice; perfect for cold climates, as it can handle temperatures down to -34.4 °C; heat-tolerant.
BotanyType: herb; succulent; densely tufted; slow-growing.
Leaves: bright green with brownish tips; sparsely hairy; with apical cilia coarser than lateral ones; oblong–lanceolate, measuring up 15 mm long, 5 mm) wide; subglobose, mostly closed rosettes, up to 5 cm in diameter; whitish center from the flexuous hairs on the tips of young leaves; produce slender stolons, up to 2 cm long, forming a mat.
Flowers: deep purple sepals; deep reddish-pink petals with a darker central stripe; red anthers; star-shaped, 10 to 14 merous; about 2 cm in diameter; in clusters on upright, leafy stalks, up to 15 cm tall in summer; rosettes die after flowering.