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   Centaurea melitensis herb
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    Centaurea solstitialis
    geeldissel (English), golden star thistle (English), sonnwend-Flockenblume (German), St. Barnaby's thistle (English), yellow centaury (English), yellow cockspur (English), yellow star thistle (English)

    Centaurea solstitialis (Photo: Charles Webber © California Academy of Sciences) - Click for full size Centaurea solstitialis (Photo: © 2001 Tony Morosco) - Click for full size Star-thistle leaves, stem and flower head (Photo: © 2001 CDFA) - Click for full size Yellow star-thistle, right. Sicilian thistle left (Photo: © 2001 CDFA) - Click for full size Centaurea solstitialis (Photo: Jo-Ann Ordano © California Academy of Sciences) - Click for full size Centaurea solstitialis (Photo: Charles Webber © California Academy of Sciences) - Click for full size Centaurea solstitialis (Photo: © 2001 CDFA) - Click for full size Centaurea solstitialis (Photo: William R. Hewlett © California Academy of Sciences) - Click for full size Centaurea solstitialis infestation in California, USA (Photo: © 2001 CDFA) - Click for full size

    C. solstitialis (Yellow Starthistle) is a taller and more robust plant than C. melitensis. C. melitensis' central spines of the main phyllaries are 5-10 mm long, whereas they are longer (10-25 mm) on C. solstitialis (DiTomaso, 2001).
    Centaurea sulphurea


    C. melitensis' corolla is 10-20 mm long, whereas C. sulphurea's corolla is greater than 25 mm long (DiTomaso, 2001).
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The Global Invasive Species Database is managed by the Invasive Species Specialist Group (ISSG) of the IUCN Species Survival Commission. It was developed as part of the global initiative on invasive species led by the Global Invasive Species Programme (GISP) and is supported through partnerships with the National Biological Information Infrastructure, Manaaki Whenua-Landcare Research and the University of Auckland. Conditions of use.
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