Milk Thistle Spiky Purple Flower heads Milk Thistle is easily distinguished by the milky white veins on the leaves Milk Thistle leaves in close up Milk Thistle is a close relative of Sow Thistle, also included in this blog. Click to share on Facebook (Opens in new window)Click to share on Twitter (Opens in new window)Click to share on Pinterest (Opens in new window)Click to email this to a friend (Opens in new window)Like this:Like Loading...