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__NOTOC__{{Plantbox
__NOTOC__{{Plantbox
| name = ''Sempervivum tectorum''
| name = ''Sempervivum tectorum''
| species = tectorum
| species = tectorum
}}
}}
'''''Sempervivum tectorum''''' ('''Common Houseleek'''<ref>[http://plants.usda.gov/java/profile?symbol=SETE5 ''Sempervivum tectorum''] at [http://plants.usda.gov/ USDA PLANTS Database]</ref>) is a perennial plant of the genus ''[[Sempervivum]]''. It is used as an [[ornamental plant]]{{wp}}.
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[[Image:Sempervivum Tectorum Greenii, Huntington.jpg|thumb|left|Sempervivum Tectorum 'Greenii']]
[[Image:Sempervivum Tectorum Greenii, Huntington.jpg|thumb|left|Sempervivum Tectorum 'Greenii']]
Sempervivum tectorum, Linn. (S. robustum, Jord. & Fourr. S. purpurascens, Schott). Houseleek. Old-man-and-woman. Fig. 3602. Developed barren rosettes 3-4 in. diam., abundantly stoloniferous, the new rosettes crowded and sessile: lvs. 50-60 to a rosette, obovate-cuneate, cuspidate, 1 1/2 – 2 or finally 3 x 5/8-3/4 in., pale green, with a distinct red-brown tip; cauline lvs. oblong-lanceolate, acute: fl.-st. including infl. about 1 ft. high, densely pilose: fls. 11-15- mostly 12-merous, 3/4-l in. across, pale red, in a scorpioid, 10-12-branched panicle 5-6 x 3-4 in.; calyx densely pilose, segms. lanceolate; petals linear, keeled, the keel deeper red. Eu. and Orient. C.L.A. 25, March, p. 54.—Variable. Var. cupreum, Hort., is said to have large rosettes which are glaucous and rose-colored; it flowers rarely. Var. expansum, Hort., is said to have broader lvs. and more open rosettes than the type. Var. pyrenaicum, Hort., is offered in the trade. Var. rubrum, Hort., has been grown in botanic gardens. Var. violaceum, Hort., has been grown in botanic gardens.
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