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The globe thistle species are perennial herbaceous plants.They form rhizomes as perennial organs. The independently upright stems are angular. The alternately arranged leaves are one to two-pinnately divided and white, woolly and tomentose on the underside.
Echinops sphaerocephalus is a glandular, woolly perennial herbaceous plant with an average height of 50–100 centimetres (20–39 in), occasionally reaching 200 cm (80 inches). [4] Its erect branching, gray, slightly wrinkled and hairy stems bear the occasional large, soft, sharply toothed, sharp-lobed pointed green leaves.
It is a compact, bushy herbaceous perennial thistle, growing to 60 cm (24 in) tall, with broad prickly leaves and bearing globes of steel-blue flowers 2.5 cm - 4.5 cm in diameter, in late summer. [5] Echinops ritro [6] and the subspecies E. ritro subsp. ruthenicus [7] have gained the Royal Horticultural Society's Award of Garden Merit ...
Milk thistle flowerhead Cirsium arizonicum, showing arachnoid cobwebbiness on stems and leaves, with ants attending aphids that might be taking advantage of the shelter. Thistle is the common name of a group of flowering plants characterized by leaves with sharp spikes on the margins, mostly in the family Asteraceae. Prickles can also occur all ...
The oil, extracted from the seeds of the cardoon, and called artichoke oil, is similar to safflower and sunflower oil in composition and use. [28] Cardoon is the feedstock for the first biorefinery in the world converting the installations of a petrochemical plant in Porto Torres , Sardinia , providing biomass and oils for the building blocks ...
Echinops exaltatus is the largest of all globe thistles, a branching perennial herb up to 150 cm (60 inches or 5 feet) tall. One plant can produces several flower heads , each with a very nearly spherical array of white or pale blue disc florets but no ray florets .