Sempervivum
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MARMOREUM  Grisebach, 1843

Synonyms :

Sempervivum tectorum var. marmoreum  (Grisebach) Boissier (1872) / Sempervivum tectorum.ssp. marmoreum  (Grisebach) Maire & Petitmengin (1908)

Sempervivum montanum  Sibthorp & Smith (1806) 

Sempervivum tectorum  Boissier (1872) 

 

Distribution : Balkans.

 

 

Description (according to 't Hart, Bleij & Zonneveld in IHSP, 2003) :

 

Rosettes 3 - 10 cm in diameter, stolons horizontal, finely pubescent.

 

Leaves obovate to obovate-spatulate or broadly lanceolate, mucronate to shortly acuminate, subterete, young leaves (offsets) strongly pubescent.

 

Flowering branches pubescent, leaves obovate or oblong to lanceolate, ± apiculate, erect.

 

Inflorescences corymbiform, generally with 3 forked cincinni.

 

Flowers : Sepals connate for up to 2.5 mm, lanceolate, acute to acuminate, reddish-green, 5 - 6.5 mm, petals linear-lanceolate to oblong-lanceolate, acuminate, red with a whitish stripe along the margins.

 

Cytology : 2n = 34.

 

Comprises aIl the diploid (2n = 34) red-flowered sempervivums of the Balkans. A very variable species, especially in leaf colour and persistence of pubescence on the leaves. Bellia & Andrade (1972: 39) based S. marmoreum ssp. rubrifolium on  "S. rubrifolium Schott", but the latter name is not traced in Index Kewensis or elsewhere. Praeger (1932: 61) distinguished a S. schlehanii fa. rubrifolium on the base of a garden plant known as S. rubicundum, but it is uncertain whether this is the same as "S. rubrifolium Schott".

Four subspecies :

Sempervivum marmoreum ssp. ballsii (Wale) Zonneveld, 1999

Sempervivum marmoreum ssp. erythraeum (Velenovsky) Zonneveld, 1998

Sempervivum marmoreum ssp. marmoreum

Sempervivum marmoreum ssp. reginae-amaliae (Heldreich & Sartori ex Boissier) Zonneveld, 1999

See also : Alan Smith, The Genus Sempervivum and Jovibarba, 1980




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