Scarlet Dahlia
| Scarlet Dahlia | ||||||||||||
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Scarlet Dahlia ( Dahlia coccinea ), illustration |
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| Dahlia coccinea | ||||||||||||
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The scarlet dahlia ( Dahlia coccinea ) is a species of the genus Dahlia ( Dahlia ) in the sunflower family (Asteraceae).
features
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The scarlet dahlia is a perennial herbaceous plant with a rhizome and tuber roots, which usually reaches heights of (50 to) 100 to 200 centimeters. The stem is bald or has only stiff hairs below. The leaves are doubly pinnate, the leaf margin is ciliate and the midrib is not or hardly winged.
There are usually two to three flower heads , rarely just one. The eight ray-florets are 1.5 to 4 centimeters long and colored yellow, orange or red. The species is very rich in shape.
The flowering period extends from August to September.
The number of chromosomes is 2n = 32 or 64.
Occurrence
The scarlet dahlia occurs in Mexico from Chihuahua and Coahuila south to Guatemala and Belize in mountains and on plateaus at altitudes of 800 to 2500 meters. It grows in open oak, pine and canyon forests on grassy, rocky or gravel slopes, on lava flows or on streams.
use
The scarlet dahlia is rarely used as an ornamental plant in borders. It has been in culture since 1798 at the latest. Today's dahlia hybrids go back to crossings of the scarlet dahlia and the large-feathered dahlia ( Dahlia pinnata ).
literature
- Eckehart J. Jäger, Friedrich Ebel, Peter Hanelt, Gerd K. Müller (eds.): Excursion flora from Germany . Founded by Werner Rothmaler. tape 5 : Herbaceous ornamental and useful plants . Springer, Spektrum Akademischer Verlag, Berlin / Heidelberg 2008, ISBN 978-3-8274-0918-8 .
Individual evidence
- ↑ Dahlia coccinea at Tropicos.org. In: IPCN Chromosome Reports . Missouri Botanical Garden, St. Louis
- ^ Dahlia in the Germplasm Resources Information Network (GRIN), USDA , ARS , National Genetic Resources Program. National Germplasm Resources Laboratory, Beltsville, Maryland. Retrieved March 14, 2018.