Hoppe rockflowers
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Hoppe rockflowers ( Draba hoppeana ) |
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| Draba hoppeana | ||||||||||||
| Rchb. |
The Hoppe rock flower ( Draba hoppeana ) is a species of rock flower ( Draba ) within the cruciferous family (Brassicaceae). It thrives in the European mountains from the Pyrenees to the Balkan Peninsula . It is named after the botanist David Heinrich Hoppe .
description
Vegetative characteristics
The Hoppe rock flower is a perennial , herbaceous plant and reaches heights of 1 to 3, rarely 6 centimeters. It forms dense lawns . The flower stalks have no leaves. The leaves are in dense, spherical rosettes. The leaf blades are linear-lanceolate and keeled.
Generative characteristics
The flowering time is in July and August. Three to six flowers stand together in the racemose inflorescences . The hermaphrodite flowers are fourfold. The four free petals are bright yellow and 3 millimeters long. The stamens are the same length.
The fruit stalk is 2 to 4 millimeters long. The pods are 4 to 7 millimeters long and bare. The pen is the fruit time about 1 millimeter long.
The number of chromosomes is 2n = 16.
ecology
The Hoppe rock flower is a Chamaephyte .
The pollination is done by insects or self-pollination .
Occurrence
The Hoppe rock flower occurs in the Silicate Alps . It grows in rock crevices, rock rubble and in snow valleys over calcium silicate slate at the alpine to nival elevation . It occurs at altitudes between 2600 and 3200 meters.
It is an association character species of the Drabo-Saxifragetum from the order Drabetalia hoppeanae and the association Drabion hoppeanae.
literature
- Siegmund Seybold (Ed.): Schmeil-Fitschen interactive . CD-ROM, version 1.1. Quelle & Meyer, Wiebelsheim 2002, ISBN 3-494-01327-6 .
- Manfred A. Fischer, Karl Oswald, Wolfgang Adler: Excursion flora for Austria, Liechtenstein and South Tyrol . 3rd, improved edition. State of Upper Austria, Biology Center of the Upper Austrian State Museums, Linz 2008, ISBN 978-3-85474-187-9 .
Individual evidence
- ↑ a b Erich Oberdorfer : Plant-sociological excursion flora for Germany and neighboring areas. 8th edition. Stuttgart, Verlag Eugen Ulmer, 2001. ISBN 3-8001-3131-5 . Page 456.
Web links
- Draba hoppeana Rchb .. In: FloraWeb.de.
- Draba hoppeana Rchb. In: Info Flora , the national data and information center for Swiss flora . Retrieved October 27, 2015.
- Data sheet with photos from Botanik im Bild / Flora von Österreich , 2005.
- Data sheet distributed in France by Tela Botanica .
- Thomas Meyer: Data sheet: Rock flowers (Draba) - flowers yellow, leaves linear, basal with photos and identification key at Flora-de: Flora von Deutschland (old name of the website: Flowers in Swabia) .