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Sea holly grows in a tall, clumping format, maxing out around 2 to 3 feet tall and 1 to 2 feet wide in its second season. It can live for decades in the right conditions. Even better?
Eryngium maritimum, the sea holly or sea eryngo, or sea eryngium, is a perennial species of flowering plant in the family Apiaceae and native to most European coastlines. It resembles a thistle in appearance because of its burr-shaped inflorescences. Despite its common name, it is not a true holly but an umbellifer.
Eryngium bourgatii, the Mediterranean sea holly (also known as Pyrenean eryngo), is a species of flowering plant in the family Apiaceae native to Andorra, France and Spain, as well as parts of the Levant, Morocco and Turkey. [1] It is an herbaceous perennial, growing to 15–45 cm (6–18 in) tall.
Common names include eryngo and sea holly (though not to be confused with true hollies, of the genus Ilex). These are annual and perennial herbs with hairless and usually spiny leaves . The dome-shaped umbels of steely blue or white flowers have whorls of spiny basal bracts .
Try these dramatic sea holly varieties for year-long displays of thistle-style flower heads and highly textural foliage
Acanthus ilicifolius, commonly known as holly-leaved acanthus, sea holly, and holy mangrove, is a species of shrubs or herbs, of the plant family Acanthaceae, native to Australia, Australasia, and Southeast Asia. It is used as medicine in asthma and rheumatism.
Acanthus mollis is a leafy, clump-forming perennial herb with tuberous roots. It has a basal rosette of dark glossy green, lobed or divided, glabrous leaves 50 cm (20 in) long and 30 cm (12 in) wide on a petiole 20–30 cm (7.9–11.8 in) long.
Eryngium ebracteatum is an evergreen herbaceous perennial growing to a height of 1.5 meters. The species has grey-green lance shaped leaves which in contrast to other South American Eryngium are almost or entirely spineless.