Sempervivum davisii

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Sempervivum davisii
Systematics
Family : Thick-leaf family (Crassulaceae)
Subfamily : Sempervivoideae
Tribe : Semperviveae
Genre : Hauswurzen ( Sempervivum )
Section : Sempervivum sect. Sempervivum
Type : Sempervivum davisii
Scientific name
Sempervivum davisii
Muirhead

Sempervivum davisii is a species of houseleek ( Sempervivum ) in the thick-leaf family(Crassulaceae).

description

Vegetative characteristics

Sempervivum davisii grows as a rosette plant with a diameter of 3 to 4 centimeters. Your few runners are 2 to 3 inches long. The obverse lanceolate to obovate, dense and conspicuously downy-haired leaves have an abrupt tip. They are gray-green and often have reddish-brown tips. Your leaf blade is 15 to 20 millimeters long and about 10 millimeters wide.

Generative characteristics

The inflorescence are compound cymes . The 13 to 14-fold flowers are about 2 centimeters in diameter. Their ovate-lanceolate, pointed sepals are 2 to 2.5 millimeters long. The lanceolate, whitish yellow petals have a length of 8 to 10 millimeters and are about 2 millimeters wide. The stamens are white, the anthers are yellow. The triangular-round nectar flakes are spread out.

Systematics and distribution

Sempervivum davisii is widespread in Turkey and northwest of Iran on primary rock on grassy slopes at altitudes of 700 to 2300 meters.

The first description by Clara Winsome Muirhead was published in 1969.

The following subspecies are distinguished:

  • Sempervivum davisii subsp. davisii
  • Sempervivum davisii subsp. furseorum (Muirhead) Karaer

proof

literature

  • Henk 't Hart, Bert Bleij, Ben Zonneveld: Sempervivum davisii . In: Urs Eggli (Hrsg.): Succulent lexicon. Crassulaceae (thick leaf family) . Eugen Ulmer, Stuttgart 2003, ISBN 3-8001-3998-7 , pp. 353 .

Individual evidence

  1. ↑ Clara Winsome Muirhead: Turkish species of Sempervivum . In: Notes from the Royal Botanic Garden, Edinburgh . Volume 29, 1969, p. 22.
  2. ↑ Fergan Karaer, Ferhat Celep, Urs Eggli: A taxonomic revision of the Sempervivum davisii complex (Crassulaceae) . In: Nordic Journal of Botany . Volume 29, number 1, pp. 49-53, 2011 ( doi: 10.1111 / j.1756-1051.2010.00974.x ).

Web links

  • Photo by Sempervivum davisii