Silesian dandelion

Silesian dandelion
	Silesian dandelion ( Taraxacum parnassicum )
Systematics
Order :	Astern-like (Asterales)
Family :	Daisy family (Asteraceae)
Subfamily :	Cichorioideae
Tribe :	Cichorieae
Genre :	Dandelion ( taraxacum )
Type :	Silesian dandelion
Scientific name
	Taraxacum parnassicum
	Dahlst.

The Silesian dandelion ( Taraxacum parnassicum ) is a species of the genus dandelion ( Taraxacum ) within the sunflower family (Asteraceae).

description

Habitus in the habitat

Infructescence with the dark red-brown achenes and pappus

Habit, leaves and flower heads

Vegetative characteristics

The Silesian dandelion grows as a graceful, perennial herbaceous plant . The mostly prostrate, basal leaves are divided into petioles and leaf blades. The relatively narrow petiole is reddish-purple. The light green leaf blade is lobed. The end lobe is about as long as it is wide, obtuse triangular and the side lobes are tongue-shaped to narrow triangular, toothed and mostly blunt.

Generative characteristics

The flowering period extends from mid to late April, and a little earlier in warmer years. The flowers stand together in a flower head. The outer bracts are ovate, usually protruding, dark green and heavily frosted, often dark purple, thickened to tubercular (= calluses). The flowers are light yellow. The scar is lead-colored, without pollen.

An important distinguishing feature of calluses dandelions are the achenes , these are more or less dark red-brown in Taraxacum parnassicum .

The number of chromosomes is 2n = 24.

Systematics

The first description of Taraxacum parnassicum done by 1926 by the Swedish botanist Gustav Adolf Hugo Dahlstedt (1856-1934). The specific epithet parnassicum means "heart leaf-like". Synonyms for Taraxacum parnassicum Dahlst. are Taraxacum silesiacum Dahlst. ex GEHaglund, Taraxacum badium Soest.

The plant species Taraxacum parnassicum belongs to the section of the calluses dandelions ( Taraxacum sect. Erythrosperma ).

distribution

Occurrence in Germany

The Silesian dandelion is scattered and rare in parts of Germany. It is somewhat more common in southern Germany in northern Bavaria and Baden-Württemberg .

Location requirements

The Silesian dandelion grows on dry roadsides and roadsides, rubble sites, semi-arid and dry lawns and on rock heads.

Species protection

The Silesian dandelion needs nature protection because of its partial endangerment and rarity.

literature

Hugo Dahlstedt: The genus Taraxacum. In: Plantae Sinensis , No. 14, Acta Horti Gotob. 2, 1926, pp. 143-184.
Reinhard Doll: The genus Taraxacum , Die Neue Brehm Bücherei, No. 473, 1974, 158 pp.
Steffen Hammel: Calluses and dandelions (Taraxacum section Erythrosperma) in Baden-Württemberg - Finds 2017 and 2018 , Jh. Ges. Naturkde. Württemberg , No. 175, Stuttgart, 2019.
Carl-Frederik Lundevall, Hans Øllgaard: The genus Taraxacum in the Nordic and Baltic countries: types of all specific, subspecific and varietal taxa, including type locations and sectional belonging , In: Preslia , Volume 71, 1999, pages 43-171.
Ingo Uhlemann, Jan Kirschner, Jan Stepanek: Taraxacum , In: Rothmaler: Exkursionsflora von Deutschland - Vascular Plants, Critical Supplementary Volume. 11th edition, Berlin, Heidelberg (Springer Spectrum), 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.

Web links

Commons : Silesian dandelion ( Taraxacum parnassicum ) - Collection of images, videos and audio files

Profile and distribution map for Bavaria . In: Botanical Information Hub of Bavaria .
Günther Blaich: data sheet with photos.

[Gregor2017-1] Thomas Gregor, Ralf Hand, Juraj Paule: Chromosome numbers of fern and flowering plants from Germany 10. In: Kochia , Volume 10, 2017, pages 45-53.