Thin-headed thistle

Thin-headed thistle
	Thin-headed thistle ( Carduus tenuiflorus )
Systematics
Order :	Astern-like (Asterales)
Family :	Daisy family (Asteraceae)
Subfamily :	Carduoideae
Tribe :	Cardueae
Genre :	Ring thistles ( Carduus )
Type :	Thin-headed thistle
Scientific name
	Carduus tenuiflorus
	L.

The thin-headed thistle ( Carduus tenuiflorus ), even narrow-headed thistle called, is a plant of the genus carduus ( Carduus ) within the family of Compositae (Asteraceae).

description

illustration

Habitus

Vegetative characteristics

The thin-headed thistle is a one to two-year herbaceous plant that reaches heights of 20 to 200 centimeters. The blue-green and tomentose hairy stems grow individually or are somewhat branched. They are winged and have spines of different sizes on their wings.

The leaves are prickly at the edges and lobed six to eight times. The underside of the leaf is hairy like a cobweb.

Generative characteristics

The flowering period extends from April to July. In the total inflorescence there are five to twenty cup-shaped inflorescences. The diameter of the flower heads is 6 to 10 millimeters. The flower crowns are pink in color.

The brown, 4 to 5 millimeters long and 10 to 13-nerved achenes have 10 to 15 millimeters long perigone bristles .

The number of chromosomes is 2n = 54.

Occurrence

Carduus tenuiflorus is native to southern and western Europe and has spread from there to central Europe, North and South America, South Africa, northern India (Kashmir) and Australia.

Carduus tenuiflorus grows mainly on disturbed locations, on dry, nitrogen-rich soils at roadsides and in pastures . It occurs in plant communities of the Sisymbrion Union .

Possible confusion

With Carduus pycnocephalus L. from the Mediterranean area, the common German name thin-headed thistle is also sometimes used.

literature

FW Smeding: De Tengere thistle (Carduus tenuiflorus Curtis) op Wieringen. Goteria , Volume 21, 1995, pp. 212-214.
E. Weeda: Nederlandse Oecologische Flora. Knnv, Volume 4, p. 128, ISBN 90-5011-129-7 .
H. van Bohemen: Atlas van de Nederlandse Flora. Kosmos, Volume I, p. 69, ISBN 90-215-0847-8 .

Individual evidence

↑ ^a ^b Erich Oberdorfer : Plant-sociological excursion flora for Germany and neighboring areas . With the collaboration of Angelika Schwabe and Theo Müller. 8th, heavily revised and expanded edition. Eugen Ulmer, Stuttgart (Hohenheim) 2001, ISBN 3-8001-3131-5 , pp. 963 .

Web links

Commons : Thin-headed thistle ( Carduus tenuiflorus ) - album with pictures, videos and audio files

Carduus tenuiflorus Curtis, Narrow-headed Thistle. In: FloraWeb.de.
Carduus tenuiflorus Curtis In: Info Flora , the national data and information center for Swiss flora . Retrieved June 13, 2016.
Thomas Meyer: Data sheet with identification key and photos at Flora-de: Flora von Deutschland (old name of the website: Flowers in Swabia ).
Keith Turnbull Research Institute, Frankston
Description of the species in the Flora of North America .
Dutch variety bank.

[Oberdorfer2001-1] Erich Oberdorfer : Plant-sociological excursion flora for Germany and neighboring areas . With the collaboration of Angelika Schwabe and Theo Müller. 8th, heavily revised and expanded edition. Eugen Ulmer, Stuttgart (Hohenheim) 2001, ISBN 3-8001-3131-5 , pp. 963 .