Rock Daphne

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Rock Daphne
Rock Daphne (Daphne petraea), habit and leaves

Rock Daphne ( Daphne petraea ), habit and leaves

Systematics
Rosids
Eurosiden II
Order : Mallow-like (Malvales)
Family : Daphne family (Thymelaeaceae)
Genre : Daphne ( Daphne )
Type : Rock Daphne
Scientific name
Daphne petraea
Leyb.

The rock daphne ( Daphne petraea ) is a species of the genus Daphne ( Daphne ) within the family of Thymelaeaceae (Thymelaeaceae). This endemic species of the Southern Alps only occurs in the Lake Garda area and its surroundings.

description

Illustration from Atlas of Alpine Flora
Habit and four-fold flowers

Habitus

The rock daphne is a cushion-forming, evergreen dwarf shrub with numerous short, strong, winding, ascending, forked trunks. It reaches heights of growth of 8 to 15 centimeters. The bark of young twigs is greenish-brown and sparsely hairy. Older trunks are covered with numerous protruding leaf scars and have a brown to gray-brown bark.

leaf

The evergreen, coarse leathery leaves of the rock daphne sit heaped at the ends of the branches. The simple leaf blade is 8 to 12 millimeters long and 2 to 3 millimeters wide and ruler-spatulate with a blunt upper end. The upper side of the leaf shows a shiny green color, the underside of the leaf is dotted with white and strongly keeled by an approximately triangular central nerve.

Inflorescence and flower

The flowering period extends from June to July. In the terminal, tufted inflorescences three to five, rarely up to ten sessile flowers are grouped together. At the base of the inflorescences are 4 millimeters long, spatulate, dry-skinned, hairy bracts .

The hermaphrodite flowers are fourfold. The four bright pink, corolla-like sepals form a downy hair on their outside and are fused into an approximately 1.5 centimeter long tube that ends in four short calyx tips .

fruit

The poisonous, sparsely hairy, coral-red, berry-like fruits resemble lonely stone fruits with their black stone core . Since both the carpels and the flower axis are involved in their formation, they are referred to as drupes as well as drupes.

Occurrence and protection

The rock daphne is endemic to the two Italian provinces of Trentino and Brescia . He colonized the mountains from Lake Ledro and Lake Idro eastwards to the northern end of Lake Garda .

The rock daphne is relatively rare and has therefore been placed under national and international legal protection. It is one of the species listed in Annexes II and IV of Directive 92/43 / EEC (Fauna-Flora-Habitat Directive) and is under special protection as a species of Community interest .

The rock daphne grows at altitudes of around 700 to 2000 meters. It colonizes cracks in the rock in steep dolomite walls and temporarily dormant rubble.

Systematics

Daphne petraea was discovered by Friedrich Leybold in 1852 and first described in the following year . Francesco Facchini had already found this species in 1846, the name he used, Daphne rupestris Facch. ex Ambrosi , however, is an invalidly published synonym.

With Daphne alpina , Daphne petraea forms the hybrid Daphne × reichsteinii Landolt & E. Hauser (1981).

use

As an ornamental plant , the rock daphne is mainly used in stone and alpine gardens .

swell

  • Xaver Finkenzeller, Jürke Grau: Alpine flowers (=  Steinbach's natural guide . Volume 16 ). Mosaik, Munich 1985, ISBN 3-570-01349-9 .

Single references

  1. ↑ a b c d e f g h i j Xaver Finkenzeller, Jürke Grau: Alpenblumen (=  Steinbach's natural guide . Volume 16 ). Mosaik, Munich 1985, ISBN 3-570-01349-9 , p. 152 .
  2. ↑ a b c d Gustav Hegi: Illustrated flora of Central Europe. Pteridophyta, Spermatophyta . 2nd Edition. Volume V. Part 2: Angiospermae: Dicotyledones 3 (2) (Cactaceae - Cornaceae) . Carl Hanser and Paul Parey, Munich and Berlin / Hamburg 1966, ISBN 3-489-74021-1 , p. 721–722 (unchanged reprint from 1926 with addendum).
  3. ↑ a b c DA Webb, IK Ferguson: Daphne. In TG Tutin, VH Heywood, NA Burges, DM Moore, DH Valentine, SM Walters, DA Webb (eds.): Flora Europaea . Volume 2: Rosaceae to Umbelliferae . Cambridge University Press, Cambridge 1968, ISBN 0-521-06662-X , pp. 258 (English, limited preview in Google Book search).
  4. ^ Sandro Pignatti (ed.): Flora d'Italia . Vol. 2. Edagricole, Bologna 2003, ISBN 88-506-2449-2 , pp. 99 (third unaltered reprint of the 1st edition from 1982).
  5. ↑ a b Marinella Zepigi: Daphne petraea Leyb. In: Forum Acta Plantarum , 2010, (online, with photos) .
  6. ^ Friedrich Leybold : Daphne petraea, a new plant in the Tyrolean Alps. In: Flora Volume 36, No. 6, 1853, pp. 81-82, (online) .
  7. ^ Daphne petraea at Tropicos.org. Missouri Botanical Garden, St. Louis
  8. ↑ (it.) Profile with photos
  9. ↑ u. a. List of plant species that are particularly suitable for a rock garden.

Web links

Commons : Rock Daphne ( Daphne petraea )  - Album with pictures, videos and audio files