Cornflower aster
| Cornflower aster | ||||||||||||
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Cornflower aster ( Stokesia laevis ) |
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| Systematics | ||||||||||||
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| Scientific name of the genus | ||||||||||||
| Stokesia | ||||||||||||
| L'Hér. | ||||||||||||
| Scientific name of the species | ||||||||||||
| Stokesia laevis | ||||||||||||
| ( Hill ) Greene |
The cornflower aster ( Stokesia laevis , syn. Stokesia cyanea L'Hér.) Is the only species of the genus Stokesia .
features
The cornflower aster is an evergreen, perennial, herbaceous plant that reaches stature heights of 30 to 60 (rarely up to 100) centimeters. The plant is an upright and branched half rosette and forms a rhizome . The leaves are lanceolate and have a broad, white median vein. The lower leaves are up to 20 centimeters long, 7 centimeters wide, stalked and have entire margins, the upper ones are sessile and toothed at the base or sometimes covered with thorns. The flower heads are arranged in a terminal panicle or individually. They are 4 to 10 centimeters in diameter. The outer bracts are leaf-like and thorny at the base. Chaff leaves are not available. The crown is blue-violet, blue, pink or white. The central flowers are radial and lighter or darker. The outer ones are dorsiventral, directed outwards, elongated, five columns and broad. The fruits have 5 narrow pappus scales.
The flowering period extends from August to September, rarely beginning in June.
The number of chromosomes is 2n = 14.
Occurrence
The cornflower aster occurs in the southeastern United States from South Carolina to Florida and Louisiana in moist, acidic pine forests and swamps.
use
The cornflower aster is widely used as an ornamental plant for perennial beds, bog beds and rock gardens. The species has been in culture since 1766 at the latest. There are several varieties. These have white heads or light blue with a white center and the plants are lower.
Name declaration
Charles Louis L'Héritier de Brutelle named the genus Stokesia after the English botanist Jonathan Stokes (1755-1831).
literature
- Eckehart J. Jäger, Friedrich Ebel, Peter Hanelt, Gerd K. Müller (eds.): Rothmaler excursion flora from Germany. Volume 5: Herbaceous ornamental and useful plants . Spectrum Academic Publishing House, Berlin Heidelberg 2008, ISBN 978-3-8274-0918-8 .
Individual evidence
- ↑ Stokesia laevis at Tropicos.org. In: IPCN Chromosome Reports . Missouri Botanical Garden, St. Louis
- ^ Joan Lane: Stokes, Jonathan (1755? –1831). Oxford Dictionary of National Biography, Oxford University Press, Sept. 2004; online edn, May 2007 ( Memento of the original from February 14, 2015 in the Internet Archive ) Info: The archive link was inserted automatically and has not yet been checked. Please check the original and archive link according to the instructions and then remove this notice. , accessed June 23, 2009.
