Eryngium giganteum (Cultivated- USA)

Eryngium giganteum M.Bieb., Fl. Taur.-Caucas. 1: 201 1808. (Syn: Eryngium asperifolium F.Delaroche; Eryngium glaucum Hoffm.);
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Eryngium giganteum (Miss Willmott’s ghost) is a species of flowering plant in the Apiaceae family, native to the Caucasus and Iran.

It is a short-lived herbaceous perennial thistle, growing to 1 m (3 ft 3 in), and producing branched heads of pale green conical flowerheads surrounded by spiny bracts in summer. The flowers turn blue at maturity. It usually dies after flowering and is therefore normally grown as a biennial.
The common name refers to Ellen Willmott, who is said to have carried seeds at all times, planting them in the gardens of fellow horticulturalists.[1]
(From Wikipedia on 29.9.13)
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Images by Ushadi (Inserted by J.M.Garg) (For more photos & complete discussions click on the links)

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Genus:   Eryngium
Botanical Name:  Eryngium x tripartitum  (fig 1,2) and
Eryngium giganticum   (fig 3,4 )
sea holly in Flower arranging show and trade…(5, 6)
First four taken at NYBG summer of 2008.  The trade pics from Kolkata 2007.
What has stayed with me over the years about sea holly, ever since I was about 5 years old or so …when I first saw my mom use them in dry flower arrangements is the heavenly blue… that somehow has light and shade and seems to play hide and seek, just like the she hen of the peacock family’s tail feathers… that are usually nothing spectacular… yet beautiful… that’s why I never had the heart to delete these pictures from 2007 and 08…

The attached image (Sea Holly 4 even stalks are blue E GIGANTICUM……) isn’t E. giganteum but would be one of the E. alpinum hybrids e.g. Eryngium x zabelii
without the lower leaves maybe also  Eryngium × olivierianum
This is as per feedback from David ji at Eryngium giganteum (website) > alpinum hybrid


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Eryngium giganteum (website) > alpinum hybrid

On these two pages
this picture
isn’t E. giganteum but would be one of the E. alpinum hybrids e.g. Eryngium x zabelii
compare https://www.inaturalist.org/observations/172693987
without the lower leaves maybe also Eryngium × olivierianum

Is it “https://www.greenhousemag.com/article/eryngium-zabelii-big-blue-culture-notebook-must-have-perennials/”?? (Eryngium zabelii Big Blue)


I wasn’t definite what the exact one pictured will be however there’s a public (viewable) facebook group dedicated to Eryngium and its cultivars where the admin Kathy Pike seems pretty knowledgeable and would probably be able to give the most reliable answers –
https://www.facebook.com/groups/725244401347246


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References:
Updated on December 31, 2025

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