Carduus crispus

Krause ring thistle ( Carduus crispus )

The Krause Krause ring thistle or thistle ( Carduus crispus ) is a plant of the genus ring thistles ( Carduus ) in the sunflower family ( Asteraceae).

Description

The Krause thistle grows as a biennial herbaceous plant that reaches the plant height of 0.5 to 2 meters. It is a Hemikryptophyt. The stem is erect, moderately abundant branches and narrow winged krausig - thorny below the flower heads or even just a few millimeters spineless.

The stem leaves are alternate, pinnately divided, sitting with verschmälertem base, upper side glabrous or nearly glabrous, dull dark green above, white- or gray-tomentose or - rarely - at least almost to the edges tomentose hairy ( then the leaf veins are occasionally less tomentose and greenish).

The flowering period extends from July to September. Most three to five, rarely more or less, short -stalked basket- like inflorescences at the end of the stem and the branches. The flower heads are 1.5 to 2.5 cm long and about ¾ as thick. The bracts are more rows, almost needle -shaped narrow and run in a thin, less than 1 mm long sting out. They are spreading, the lower also slightly bent, hairy rare spinnwebig. There are only tubular flowers available that are hermaphroditic and purple.

The achenes are about 3 mm long. The pappus consists of white, about 1 cm long hair that are not feathery.

Occurrence

The general spread of the frills thistle extends from France to Norway, southward to northern Italy and Bulgaria, eastward to the Caucasus and Siberia, as well as Mongolia to China.

Synanthropic colonizes the Krause Thistle UK, North America and New Zealand and probably that of Mongolia and Japan.

The Krause thistle grows in Bach Staudenfluren on field - forest and roadsides, on railway land and dumps, as well as in open, disturbed, nitrogen- affected areas. It thrives on fresh to moist, fertile, humus-rich loam to sandy or clay soils. In the lowland area as it is missing, as are in rougher altitudes of the mountains, the foothills of the Alps and country; otherwise it occurs scattered and often in moderate individual- rich, loose stocks. It thrives rarely at altitudes above 1000 meters. Phytosociological it is Klassenkennart the tenacious ruderal ( Artemisietea ).