The Stemless Thistle (Onopordum acaulon) is a weed native to the Mediterranean. Seen flowering along the edges of a creekbed in the northern Flinders Ranges in October.
Stemless Thistle
Australian Lesser Wanderer Butterfly on Milk Thistle
Australian Lesser Wanderer Butterfly (Danaus petilia) feeding on Milk Thistle (Silybum marianum) at Wilpena Pound.
Saffron Thistle
Carthamus lanatus, Saffron Thistle, is an introduced species seen in disturbed soils and waterways in the Flinders Ranges.