lady's-thistle

[ ley-deez-this-uh l ]
/ ˈleɪ dizˌθɪs əl /

noun

a composite plant, Silybum marianum, of the Mediterranean region, having glossy, spiny leaves and purplish-red flower heads.
Also called holy thistle, milk thistle.

Origin of lady's-thistle

First recorded in 1545–55