Cirsium palustre
Marsh thistle ( Cirsium palustre ) from: Jacob Sturm, Germany flora in pictures, Stuttgart ( 1796)
The marsh thistle ( Cirsium palustre ) is a plant that belongs to the subfamily of Carduoideae within the sunflower family ( Asteraceae).
Description of the plant
The marsh thistle is (rarely to 300) achieved centimeters a usually two or more years, hapaxanthe herbaceous plant that plant height of about 30 to 200. Your solitary, erect, at most slightly branched stems are winged over the entire length limp or frizzy thorny and provided up to the top with spiky leaves. It falls because of their stiff, serrated leaves, which often undermined reddish, dark green on top, and are hand more or less white- tomentose. The lanceolate to sinuate fiederspaltige leaf blade is 15 to more than 30 cm long and 3-10 cm broad, with spiny toothed sections. If petioles are present then they are winged thorny.
In short, up to 1 cm long stems are two to eight basket- shaped inflorescences together in balls at the stem ends. The somewhat spinnwebig hairy flower heads have a height 10 to 20 mm and a diameter of 8 to 13 mm. The bracts are available in five to seven rows. Your mostly dark - purple, or rarely pale pink to white-colored tubular flowers are a total of 11 to 13 mm long with a 5-7 mm long corolla tube and 3 to 4.5 mm long corolla lobes.
The glossy achene is 2.5 to 3.5 mm in size with a feathery hairs and 9 to 11 mm long pappus.
Dissemination
The marsh thistle are found primarily in wet meadows, marshes, ditches, on the banks or in riparian forests. She likes damp and shady places at elevations up to 800 meters.
The natural range covers the whole of Europe and the temperate Siberia. In the northeastern United States as well as in Newfoundland, Labrador, Ontario, Quebec and British Columbia in Canada it is considered as a neophyte.
Swell
- David J. Keil: Cirsium in the Flora of North America: Cirsium palustre - Online. ( English )
- Swamp thistle. In: FloraWeb.de.