genus Silybum

Thesaurus

Noun

1.genus Silybum - small genus of east African herbs Silybumasterid dicot genus - genus of more or less advanced dicotyledonous herbs and some trees and shrubsaster family, Asteraceae, Compositae, family Asteraceae, family Compositae - plants with heads composed of many florets: aster; daisy; dandelion; goldenrod; marigold; lettuces; ragweed; sunflower; thistle; zinniablessed thistle, holy thistle, lady's thistle, Our Lady's mild thistle, Silybum marianum, milk thistle - tall Old World biennial thistle with large clasping white-blotched leaves and purple flower heads; naturalized in California and South America