Short-flowered dandelions
| Short-flowered dandelions | ||||||||||||
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| Taraxacum brachyglossum | ||||||||||||
| Dahlst. |
The short-flowered dandelion ( Taraxacum brachyglossum ) is a species of the genus dandelion ( Taraxacum ) within the sunflower family (Asteraceae).
description
Vegetative characteristics
The short-flowered dandelion grows as a mostly graceful, perennial herbaceous plant . The leaves are divided into a petiole and a leaf blade. The relatively broad, red-violet petiole is often winged. The dark green leaf blade is lobed. The lateral lobes are broad to narrow deltoid or triangular and the end lobes are relatively short.
Generative characteristics
The flowering period extends from mid to late April, and a little earlier in warmer years. The flowers stand together in flower heads. The outer bracts of the flower are mostly red-violet, egg-lanceolate to lanceolate, almost close-fitting or protruding, narrowly white-edged, hairless, thickened to horned (= calluses). The short, yellow flowers are rarely fully open, often rolled up. The scars dark green.
An important distinguishing feature of calluses dandelions are the achenes , which in Taraxacum brachyglossum are light to dark brick-red.
The number of chromosomes is 2n = 24.
Systematics
The first description of Taraxacum brachyglossum was in 1905 by the Swedish botanist Gustav Adolf Hugo Dahlstedt (1856-1934).
The species Taraxacum brachyglossum belongs to the section of the calluses dandelions ( Taraxacum sect. Erythrosperma ) in the genus Taraxacum .
Occurrence
Distribution in Germany
The short-flowered dandelion is relatively rare in all of Germany and is almost completely absent in the south. In Bavaria there is only one occurrence on the Franconian Alb . In Baden-Württemberg, only two records from the Swabian Alb and one from the Upper Neckar Valley are known. There are currently no findings from Thuringia.
Location requirements
The short-flowered dandelion thrives in Germany mostly in dry grasslands and heather, also on roadsides and in arable land.
Species protection
The short-flowered dandelion needs nature protection because of its high risk and rarity.
swell
literature
- Hugo Dahlstedt: Om skandinavaviska Taraxacum -former. In: Bot. Not. No. 3, 1905, pp. 145-172.
- Reinhard Doll: The genus Taraxacum (= Die Neue Brehm Bücherei, No. 473). 1974.
- Götz Heinrich Loos, Klaus Jung and Arno Wörz: Taraxacum Wiggers 1780, nom. conserv. In: Oskar Sebald, Siegmund Seybold, Georg Pilippi and Arno Wörz (eds.): The fern and flowering plants of Baden-Württemberg. Volume 6, Verlag Eugen Ulmer, Stuttgart 1996, pages 350-369.
- Ingo Uhlemann: The genus Taraxacum (Asteraceae) in eastern Germany (= Mitt. Florist. Cart. Saxony-Anhalt, special issue). 2003.
- Ingo Uhlemann, Jan Kirschner and Jan Stepanek: Taraxacum. In: Rothmaler: Exkursionsflora von Deutschland - Vascular Plants, Critical Supplementary Volume. 11th edition, Springer Spectrum, Berlin and Heidelberg 2016, pp. 133–184.
Individual evidence
- ↑ Thomas Gregor, Ralf Hand, Juraj Paule: Chromosome numbers of fern and flowering plants from Germany 10. In: Kochia , Volume 10, 2017, pages 45-53.