Dalmatian solderwort
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Dalmatian Lotwurz ( Onosma visianii ) |
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| Clementi |
The Dalmatian Lotwurz ( Onosma visianii ), also called Dalmatian Lotwurz and Visiani-Lotwurz , is a plant species within the family of the predatory plants (Boraginaceae). Their main area of distribution is on the Balkan Peninsula and in Southeast Europe .
description
Vegetative characteristics
The Dalmatian Lotwurz grows as a biennial herbaceous plant and reaches heights of 30 to 50 centimeters. The above-ground parts of the plant are covered with stinging, stiff hairs ( trichomes ) that sit on bumps. The bumps of the long, protruding bristle hairs are themselves bare, i.e. without short bristle hairs arranged in a star shape. This half-rosette plant has a terminal base rosette without lateral, stalked leaf rosettes . The alternate, undivided leaves are linear, usually pointed at the front, 10 to 25 (sometimes 5 to 40) centimeters long and already dried up at the time of flowering.
Generative characteristics
From the center of the rosette arises a single inflorescence normally dark brown crowded stem is therefore straight and branched rapidly above the ground. The plant has a more or less spherical habit from the flowering period . The inflorescence has the shape of a thyrse .
The hermaphrodite flowers are radially symmetrical with a double flower envelope . Two or three of the sepals are more or less fused together laterally. The calyx is 10 to 17 millimeters long at the flowering time and 18 to 25 millimeters at the fruiting time. The first white and later pale yellow petals are to a walzlich-belligen is short five-toothed, 15 to 20 millimeters long and. The five stamens have 6 to 9 millimeters long, usually completely ganzrandige anthers , which are firmly connected together laterally over their entire length. Two carpels have become a top permanent ovary grown, which is in four parts by a false septum.
The Klaus fruit breaks down into four solitary partial fruits, so-called Klausen . The more or less wrinkled or warty claws are 4 to 5 millimeters long.
The number of chromosomes is 2n = 18.
ecology
The flowering of this hemicryptophytes ranges in central Europe from May bis June . The plant flowers only once, then dies and the seeds spread like a steppe roller .
Occurrence and endangerment
The main distribution area of the Dalmatian Lotwurz is on the Balkan Peninsula and in Southeast Europe . In the German-speaking area it only occurs in Austria . It is rare in Central Europe .
In Austria, occurrences are only known from the Pannonian region of Lower Austria . The Dalmatian Lotwurz prefers rock steppes and dry grassland over hard limestone in the colline to partially submontane altitude range . In Austria the Dalmatian Lotwurz is considered endangered.
Individual evidence
- ↑ Onosma visianii at Tropicos.org. In: IPCN Chromosome Reports . Missouri Botanical Garden, St. Louis
- ↑ Distribution map at Euro + Med .
literature
- Manfred A. Fischer, Karl Oswald, Wolfgang Adler: Excursion flora for Austria, Liechtenstein and South Tyrol . 3rd, improved edition. Province of Upper Austria, Biology Center of the Upper Austrian State Museums, Linz 2008, ISBN 978-3-85474-187-9 , p. 691 .
