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.
- RHS A-Z encyclopedia of garden plants. United Kingdom: Dorling Kindersley. 2008. p. 1136. ISBN 1405332964.
- "RHS Plant Selector - Eryngium giganteum". Retrieved 19 June 2013.
- "RHS Plant Selector - Eryngium giganteum 'Silver Ghost'". Retrieved 19 June 2013.
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