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Milk thistle flowers isolated on a white background. Top view.

Cotton Thistle, Onopordum acanthium, sometimes posited as the Scotch Thistle, against a natural green background with copy space.

Nature's resilience: A solitary thistle stands tall amidst the sprawling fields, a testament to its strength and beauty in the face of the elements. #FieldElegance #NatureResilience

Echinops flower bud.

Image taken in May in the Alpes-de-Haute-Provence

Flowering Milk Thistle (Silybum marianum). Also known as Marian's Thistle, St. Mary's Thistle, Holy Thistle, and Blessed Thistle. Historically used as a medicinal herb. An invasive species in many areas.

Plants of Europe with purple or pink colours.

Scottish Thistle

Close up of an unopened thistle flower head. Cirsium. Selective focus. Areas out of focus.

Close up view of a thistle.

milk thistle flower isolated on white background with copy space for your text. Top view. Flat lay pattern.

Purple flowers garden background

Thistle on a white background

Close-up of artichoke (Cynara scolymus) plant blossoming purple colored, in the end of june, beginning of july in the vegetable garden in a summer sunny day.

Different flowers of milk thistle buds isolated on a white background. Silybum marianum.

Agricultural activity in Italy and organic farming: artichoke blooming flowers

Defocus globe gray Thistle flowers grass wild on green background. Globe-Thistle Flower. Coronavirus molecule. Virus, bacteria. Metaphor and symbol. Biological research. Out of focus.

Purple Thistle flower

Flower of wild milk thistle flower silybum marianum garden

Safflower (Carthamus tinctorius) on its way to blossom

The plant is dried on a white background

Scotch (or Scottish) thistle (Onopordum acanthium) is also known as cotton thistle. The photograph shows how it looks in its second year, which is when it grows to measure about 7 feet (over 2 metres) in height. Scotch thistle is biennial. At first a spiny rosette shows itself while a deep tap root is developing under the soil. In the second year, the large central stem grows and classic and impressive purple thistle flowers grow from June to July. It has been suggested that gardeners might plant this thistle deliberately just for this impressive display, together with its overall attractive pale grey-green colour. The ground in which this thistle flourishes was cleared of brambles just a year ago, with a view to turning the land into allotments for local gardeners. In the meantime, living seeds have developed, and now the area grows foxgloves, opium poppies, scarlet pimpernel, red dead-nettle, Rumex, purple vetch, stinging nettles and groundsel, to name but a few, in addition to the Scotch thistle.

Asteraceae in spring

Close up view of a bee on a thistle flower

Onopordum illyricum commonly known as borriquero thistle belonging to the compositae family in different stages of flowering pollinated by honey insects

green flowers garden background

dried blue thistle flower closeup in white back

Close up of Seed heads of coneflower (Echinacea sp.) in late autumn or early winter

Thistle flower and leaves with prickles isolated against white

Musk Thistle (Carduus nutans) in Jackson (Jackson Hole) at Teton County, Wyoming

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