Sempervivum
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MATRICUM   Letz, 2009

Synonyms :

Sempervivum schlehanii var. dimorphum  Domokos (1936)

Sempervivum schlehanii var. tokajense  Domokos (1936)

Sempervivum marmoreum var. angustissimum  Priszter (1980)

Sempervivum marmoreum fa longirameum  Priszter (1985)

Section Sempervivum

DistributionOccuring in the west from the Hungarian Medium Mountains north-eastwards along the Slovak-Hungarian border, growing on rocky, exposed south-facing habitats on various volcanic as well as calcareous substrates, 150 - 1100 m.

Description :

Rosettes (3-) 5 - 10 (-13) cm in diameter.

Leaves (15-) 25 - 80 x 5 - 15 (-20) mm, obovate-spatulate to oblong, mostly broader above, abruptly mucronate, upper side flat to concave, underside convex, green, often with red-purple tip or flushed red over the upper part, to the naked eye not conspicuously pubescent, never glabrous, hairs 0.10 - 0.25 mm long and relatively sparse and bearing a small terminal gland, margins ciliate.

Cauline leaves oblong lanceolate, acuminate, 2 - 5 cm long and 3.5 - 15 mm broad, at least partly floushed red, glandular hairy, margins ciliate.

Inflorescences up to 35 cm high, (12-) 30 - 60 (-65) flowered, branched.

Flowers 12-merous, 1.5 - 2.5 cm in diameter, sepals linear-lanceolate, petals 8 - 12 x 1 - 2 mm, linear to linear-lanceolate, with glandular hairs on underside and margins, whitish to pale pink, with a broad darker median band of purple lines, stamens purple-violet, anthers purple to violet with yellow pollen.

Flowering time : August.

Cytology : 2n = 68

 

Published in Preslia 81: 293-308, 2009




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