Silybum.
Family Asteraceae > Subfamily Carduoideae > Tribe Cardueae > Subtribe Carduinae.
Plants of the World Online and Mabberley recognise 2 species – Silybum marianum and Silybum eburneum.
Native to the Mediterranean and the Middle East they hybridise readily.
Silybum marianum is the one most commonly seen.
J.F.
