Lead gray dandelions
| Lead gray dandelions | ||||||||||||
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| Scientific name | ||||||||||||
| Taraxacum plumbeum | ||||||||||||
| Dahlst. |
The lead Gray dandelion ( Taraxacum plumbeum ) is a member of Callus dandelions ( Taraxacum sect. Erythrosperma ).
Appearance
The perennial herbaceous plant has deep yellow flowers . The more or less hairy leaves are dark green and lobed, with the side lobes showing small teeth on the upper edge. The dandelion has reddish petioles , narrow to slightly winged. The shell is more or less black-green and frosted. The outer bracts are narrowly egg-shaped to egg-lanceolate and usually loosely attached, clearly bordered and not thickened to thickened. The inner bracts are pure green and tuberous. The branches of the style are gray. The achenes of Taraxacum plumbeum are brick-red and 2–2.5 mm long.
The plant blooms from mid-April to early May, and a little earlier in warm years.
The number of chromosomes is 3n = 24. It is therefore a triploid species.
Initial description
Taraxacum plumbeum was first described in 1911 by the Swedish botanist Gustav Adolf Hugo Dahlstedt (1856-1934) . Synonym is Taraxum franconicum Sahlin.
distribution
Location requirements
The lead gray dandelion grows preferentially in sheep pastures, also on roadsides and arable land.
Distribution in Germany
The plant is found scattered all over Germany. In Baden-Württemberg there is evidence from the Swabian Alb, the Neckar Valley and the Main-Tauber region.
Species protection
The species needs nature protection because of its endangerment and rarity. Like all callus dandelion species, the lead-gray dandelion is a low-competitive species that colonized pioneer locations. The species can be promoted through extensive grazing.
literature
- Hugo Dahlstedt: Västsvenska Taraxaca , Ark. Bot. 10 (11), pp. 1-73, 1911
- Reinhard Doll: The genus Taraxacum , Die Neue Brehm Bücherei, No. 473, 158 pages, 1974
- Götz Heinrich Loos, Klaus Jung & Arno Wörz (1996): Taraxacum Wiggers 1780, nom. conserv. - In: Oskar Sebald, Siegmund Seybold, Georg Philippi & Arno Wörz (eds.): The ferns and flowers of Baden-Württemberg , Volume 6: pp. 350-369, Stuttgart (Verlag Eugen Ulmer), 1996
- Ingo Uhlemann: The genus Taraxacum (Asteraceae) in eastern Germany , Mitt. Florist. Cart. Saxony-Anhalt. Special issue, 136 pages, 2003
- Ingo Uhlemann, Jan Kirschner & Jan Stepanek: Taraxacum, In: Rothmaler: Exkursionsflora von Deutschland - Vascular Plants , Critical Supplementary Volume. - 11th edition pp. 133-184, Berlin, Heidelberg (Springer Spektrum), 2016
Individual evidence
- ↑ a b Editor: Thuringian Botanical Society eV, Institute for Special Botany of the Friedrich Schiller University Jena, Thuringian State Institute for Environment and Geology, Jena Authors: Hans-Joachim Zündorf, Karl-Friedrich Günther, Heiko Korsch, Werner Westhus: Flora von Thuringia - The wild fern and flowering plants of Thuringia , Weissdorn-Verlag 2006.
- ↑ a b c d Frank Müller, Christiane M. Ritz, Erik Welk, Karsten Wesche (eds.): Exkursionsflora von Deutschland. Founded by Werner Rothmaler. Vascular Plants: Critical Supplementary Volume , 11th revised and expanded edition. Springer-Verlag, 2016. ISBN 3-827431-32-8 . In it: Taraxum from p. 133, Taraxum section Erythrosperma , p. 140f.
- ↑ Thomas Gregor, Ralf Hand & Juraj Paule: Chromosome numbers of fern and flowering plants from Germany 10 , Kochia 10, pp. 45–53, 2017