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Carduus is a genus of flowering plants in the family Asteraceae, and the tribe Cardueae, ... The flower heads are solitary or borne in inflorescences of up to 20.
Carduus nutans is a biennial plant in the daisy and sunflower family Asteraceae with the common names musk thistle, [1] nodding thistle, and nodding plumeless thistle. It is native to regions of Europe, Central Asia, and North Africa, where it is a scattered pasture plant.
Flower heads are 2–5 per cluster, densely matted with cobwebby hairs at the base of the phyllaries and spiny towards the tips. Corollas are pink to purple, approx. 1.0–1.4 cm (0.4–0.6 in) long, and the fruits are brown to gold, with a bristly, minutely barbed pappus.
This is a descriptive name, referring to the bluish colour of the flower heads. Such descriptive names for tribes are not valid under the International Code of Nomenclature for algae, fungi, and plants, which requires them to be based on a generic name. The name has been corrected by some authors to Cynareae, but this was not the name that was ...
Carduus marianus L. Silybum marianum is a species of thistle. ... The flower heads are 4 to 12 cm long and wide, of red-purple colour.
A few sessile flowers (from two to five) are gathered in an inflorescences very close together and even agglomerated, at the top of the stems. The flower heads show a short, leafy peduncle that supports a hemispheric to ovoidal structure, composed of several bracts. Flowers are violet-purple and 2–2.5 centimetres (0.79–0.98 in) in diameter.
Carduus tenuiflorus is a species of flowering plant in the family Asteraceae. It is known variously as slender-flower thistle, [1] sheep thistle, [1] shore thistle, [1] slender thistle, [1] winged plumeless thistle, [2] winged slender thistle [1] and winged thistle. [1] It is native to western Europe and Northwest Africa, and is an introduced ...
Carduus smallii (Britton) H.E.Ahles, syn of var. vittatum Cirsium smallii Britton, syn of var. vittatum Cirsium horridulum , called bristly thistle , purple thistle , or yellow thistle is a North American species of plants in the tribe Cardueae within the family Asteraceae .