Broad-leaved hornwort
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Broad-leaved hornwort ( Cerastium latifolium ) |
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The Broad chickweed ( Cerastium latifolium ), also Limestone-chickweed called, is a plant of the genus cerastium ( Cerastium ) within the family of Caryophyllaceae (Caryophyllaceae).
description
The broad-leaved hornwort is a perennial herbaceous plant that reaches heights of 3 to 10 centimeters, is bluish-green in color and has a grassy habit. The stem is hairy, stipules are missing. The opposite, sessile leaves are soft, covered with 0.5 millimeter long glandular hairs, 10 to 35 millimeters long, broadly ovate to lanceolate, pointed and thick.
The broad-leaved hornwort blooms from July to August. The inflorescences are also hairy. The hermaphrodite flowers are five-fold with a double flower envelope . The five sepals are free. The five white petals are 12 to 18 millimeters long, slightly edged and deeply split. There are ten stamens and five styles . The capsule fruit is up to 15 millimeters long and has ten fruit teeth.
The species chromosome number is 2n = 36.
distribution
The broad-leaved hornwort is a rare plant species, its main area of distribution is the Alps ( Austria , France , Germany , Switzerland , Italy ), in addition there are some isolated occurrences in the area of the former Czechoslovakia , in Poland and Romania .
The species grows in rock rubble fields of the alpine level, especially above the tree line on fresh, lime-rich rock rubble soil. She is a Thlaspeion rotundifolii federation character. She is a rubble crawler.
It thrives in the Allgäu Alps from Thäli am Joch above the Prinz-Luitpoldhaus in Bavaria at 2000 m to the summit of the Großer Krottenkopf , the highest mountain in the Allgäu at 2655 m above sea level.
literature
- Erich Götz: Identify plants with the computer . 2000, ISBN 382528168X .
Individual evidence
- ↑ a b Erich Oberdorfer : Plant-sociological excursion flora for Germany and neighboring areas . 8th edition. Page 378. Stuttgart, Verlag Eugen Ulmer, 2001. ISBN 3-8001-3131-5
- ↑ Entry on the distribution area of the species in Flora Europaea
- ↑ Erhard Dörr, Wolfgang Lippert : Flora of the Allgäu and its surroundings. Volume 1, IHW, Eching 2001, ISBN 3-930167-50-6 , pp. 501-502.
Web links
- Broad-leaved hornwort. In: FloraWeb.de.
- Distribution map for Germany. In: Floraweb .
- Cerastium latifolium L. In: Info Flora , the national data and information center for Swiss flora . Retrieved October 12, 2015.
- Thomas Meyer: Data sheet with identification key and photos at Flora-de: Flora von Deutschland (old name of the website: Flowers in Swabia )