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RED STAR-THISTLE Centaurea calcitrapa (Asteraceae) Height to 70cm. Branched, superficially thistle like biennial. The reddish-purple flowers are borne in heads 8-10mm across, surrounded by much longer spiny bracts (July-Sept). It was introduced into Britain but is now established in a few sites, chiefly at Cuckmere Haven in Sussex.
- © PAUL STERRY/Nature Photographers
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- Contained in galleries