It is most likely to be confused with a closely related species called prickly sow thistle (Sonchus asper), which looks very similar but has more prickly leaves than the sow thistle. The lobes in each ...

Care For best results when growing eryngiums, plant in spring or summer ... in milder climates and looks rather like leathery thistle leaves. In summer, the well branched stems carry small ...

However stem elongation ("bolting") occurs when the plant produces flowers ... However, it is the only thistle species in New Zealand that has spines on the foliage on the surface of leaves in ...