Dwarf alpine rose

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Dwarf alpine rose
Dwarf Alpine Rose (Rhodothamnus chamaecistus)

Dwarf Alpine Rose ( Rhodothamnus chamaecistus )

Systematics
Order : Heather-like (Ericales)
Family : Heather family (Ericaceae)
Subfamily : Ericoideae
Tribe : Phyllodoceae
Genre : Rhodothamnus
Type : Dwarf alpine rose
Scientific name
Rhodothamnus chamaecistus
( L. ) Rchb.

The dwarf alpine rose ( Rhodothamnus chamaecistus ) is a species of the genus Rhodothamnus within the heather family (Ericaceae).

description

The dwarf alpine rose grows as a graceful, evergreen dwarf shrub with ascending branches and reaches heights of 10 to 30 centimeters. The leaves are alternate and heaped at the branch ends. The tough, leathery leaves are up to 15 millimeters long. The leaf margin is toothed and hairy with bristles.

The flowering period extends from May to July. At the end there are one to four flowers on up to 1.5 centimeters long, glandular-haired flower stalks. The hermaphroditic flowers are radial symmetry and five-fold with a double flower envelope . The five sepals are ciliate glandular. The five pink, rarely white petals are only fused at their base.

The number of chromosomes is 2n = 24.

Occurrence

The distribution area of the dwarf alpine rose extends only in the Eastern Alps from Lake Como and the Allgäu to the Karawanken . In Austria , the dwarf alpine rose is missing in Vorarlberg , Vienna and Burgenland .

As the site are calcareous sunny locations, rock and debris corridors, dwarf shrub heaths and mountain bushes preferred. It is a character species of the Erico-Rhododendretum hirsuti.

It thrives in the montane to subalpine altitude range at altitudes between 500 and 2400 meters. In the Allgäu Alps it only rises to an altitude of 2000 meters on the Kanzberg plateau in the Tyrolean part.

Systematics

The genus Rhodothamnus is not closely related to the alpine roses of the genus Rhododendron . The genus Rhodothamnus is believed to be of a high developmental age, which certainly extends into the Tertiary .

Another species of the genus, Rhodothamnus sessilifolius P.H.Davis, has been known since 1960 . It has only a few occurrences in northeastern Turkey and is endangered there. There have been no further finds since 1960 and were found again in 2000 at the type location and at new locations. It barely reaches heights of 10 centimeters. It thrives at altitudes of 2100 to 2400 meters.

literature

  • Xaver Finkenzeller, Jürke Grau: Alpine flowers. Recognize and determine (=  Steinbach's natural guide ). Mosaik, Munich 2002, ISBN 3-576-11482-3 .
  • Wolfgang Adler, Karl Oswald, Raimund Fischer: Excursion flora of Austria . Ed .: Manfred A. Fischer. Eugen Ulmer, Stuttgart / Vienna 1994, ISBN 3-8001-3461-6 .

Individual evidence

  1. ↑ a b Erich Oberdorfer : Plant-sociological excursion flora for Germany and neighboring areas . With the collaboration of Angelika Schwabe and Theo Müller. 8th, heavily revised and expanded edition. Eugen Ulmer, Stuttgart (Hohenheim) 2001, ISBN 3-8001-3131-5 , pp.  730-731 .
  2. ↑ Erhard Dörr, Wolfgang Lippert : Flora of the Allgäu and its surroundings. Volume 2, IHW, Eching 2004, ISBN 3-930167-61-1 .
  3. ↑ S. Terzioglu, RI Milne: An emended description for Rhodothamnus sessilifolius PH Davis (Ericaceae). In Edinburgh Journal of Botany , Volume 59, Issue 2, 2002, pp. 291-294. doi : 10.1017 / S0960428602000100

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