Lonetal whitebeam
| Lonetal whitebeam | ||||||||||||
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Lonetal whitebeam ( Sorbus lonetalensis ) |
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| Scientific name | ||||||||||||
| Sorbus lonetalensis | ||||||||||||
| S. Hammel & Haynold |
The Lonetal whitebeam ( Sorbus lonetalensis ) belongs to the bastard whitebeam ( Sorbus hybrida agg.) From the plant genus whitebeam ( Sorbus ) within the rose family (Rosaceae). It stands morphologically between the real whitebeam ( Sorbus aria ) and the Vosges whitebeam ( Sorbus mougeotii ). These are also likely to be the parent species of the fixed bastard . As an agamosperm species, the Lonetal whitebeam reproduces asexually .
description
Vegetative characteristics
The Lonetal whitebeam is a slender bush tree (i.e. in the form of growth between the bush and the tree ) with heights of up to 6 meters. The alternate arranged leaves are in petiole and leaf blade divided. The green leaves of the short shoots are about 8.5 to 11 inches long and 6 to 8.5 inches wide. The leaves of the long shoots reach a length of 9.5 to 11.5 centimeters and a width of 6 to 8.5 centimeters. The leaf base angles form a conspicuous funnel-shaped leaf base. The leaf blade is elliptical or broadly spreading with three to four clearly rounded leaf lobes (these are more pointed than the Vosges whitebeam). The underside of the leaf is pale gray tomentose. The leaf blade has 9 to 11 pairs of leaf veins .
Generative characteristics
The Lonetal whitebeam is tetraploid . The carmine-red false fruits are 10 to 11.5 × 10.5 to 13 millimeters in size. The fruit ripens in mid to late September.
Occurrence
The Lonetal whitebeam is a local endemic to Baden-Württemberg with a small occurrence of ten known specimens south of Herbrechtingen-Bissingen ob Lontal. It grows on the edges of forests and on the edge of forest roads.
Botanical history and taxonomy
Sorbus lonetalensis was first discovered by Thomas Meyer (Günzburg) in 2014. It was first described in 2015 by Steffen Hammel and Bernd Haynold . The specific epithet lonetalensis was chosen after the location of the Lonetal whitebeam in the Lonetal , one of the longest dry valleys in Germany. The type proof is in the Natural History Museum Stuttgart (STU).
Sennikov and Kurtto have been selling the whitebeam under the name Hedlundia lonetalensis since 2017 . Christenhusz, Fay and Byng call them Pyrus lonetalensis in 2018 .
Endangerment and nature conservation
The few bushes / trees are endangered. Four trees have already been placed on the cane through forest construction measures and maintenance of the forest paths . The sites are now under legal nature protection as a biotope protection forest (Section 30a of the Baden-Württemberg Forest Act). In 2014, young plants were cultivated from the fruits of the type tree. In a few years' time, one specimen should ensure the survival of the Lonetal whitebeam in the arboretum of the outdoor department in the Botanical Garden of the University of Ulm .
The red list of fern and flowering plants in Germany describes the Lontal whitebeam as extremely rare. Germany is particularly responsible for their preservation.
literature
- Steffen Hammel, Bernd Haynold: Sorbus lonetalensis - a new whitebeam from Baden-Württemberg. In: Annuals of the Society for Natural History in Württemberg , Volume 171, 2015, pp. 77–94.
- Alexander Sennikov, Arto Kurtto: A phylogenetic checklist of Sorbus s. l. (Rosaceae) in Europe. In: Memoranda Soc. Fauna Flora Fennica 93, Helsinki 2017, pages 1-78. https://journal.fi/msff/article/view/64741
- Maarten MJ Christenhusz, Michael F. Fay, James W. Byng: The Global Flora Special Edition: GLOVAP Nomenclature Part 1, 2018.
- Detlef Metzing, Eckhard Garve, Günter Matze-Hajek: Red list and total species list of fern and flowering plants ( Trachaeophyta ) in Germany. In: Red List of Endangered Animals, Plants and Fungi in Germany Volume 7: Plants, Nature Conservation and Biological Diversity 70 (7), pages 13–358.
Web links
- Thomas Meyer: Data sheet with identification key and photos at Flora-de: Flora von Deutschland (old name of the website: Flowers in Swabia )
Individual evidence
- ↑ Heidenheimer Zeitung GmbH & Co KG: Discovery: The Lonetal whitebeam: A tree that only exists here. August 21, 2019, accessed August 24, 2019 .