| Family | CRASSULACEAE |
| Genus species | Sempervivum arachnoideum L. |
| Bibliography | Sp. Pl. 1: 465 (1753) |
| Native Range | Alps to Pyrenees and Apennines |
| Primary Biome | Temperate |
| Habitat | rocks and scree |
| Altitude | 700-3100m |
| Description | rosettes small, 0.5-2cm, long white hirsute, floral stems densely glandular hirsute, stem leaves obtuse, glandular, flowers 5-20 in compact inflorescence |
| Size | 5-10cm |
| Color | pale red |
| Bloom | summer |
| Ca | - |
| Type | succulent perennial |
| Cultivation | sunny rock crevices, protection against winter wet alpine house, poor, drained soil, sun |
| Propagation | seed in spring, uncovered, germ. 1-3 months, 18-21°C division in spring and late summer; detachment of rosettes |
| Synonyms | Sedum arachnoideum E.H.L.Krause Sedum arachnoideum f. bryoides Farrer Sedum arachnoideum var. cottettii Farrer Sedum arachnoideum f. transalpinum Farrer Sempervivum arachnoideum ssp. doellianum (C.B.Lehm.) Nyman Sempervivum arachnoideum var. glabrescens Willk. Sempervivum arachnoideum var. sanguineum (Jeanb. & Timb.-Lagr.) Rouy Sempervivum arachnoideum ssp. sanguineum (Jeanb. & Timb.-Lagr.) H.Marcailhou Sempervivum x barbulatum ssp. etruscum D.Donati & G.Dumont Sempervivum doellianum C.B.Lehm. Sempervivum hausmannii Nyman Sempervivum heterotrichum Schott Sempervivum moggridgei De Smet ex Hook.f. Sempervivum sanguineum Jeanb. & Timb.-Lag. |
| Territory | 1 Europe 11 Middle Europe (AUT Austria, GER Germany, SWI Switzerland) 12 Southwestern Europe (COR Corse, FRA France, SPA Spain) 13 Southeastern Europe (ITA Italy) |
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