Henry W. Coe - Wildflower Guide

Thistle, Milk Thistle, Holy Thistle

Scientific Name: Silybum marianum
Family: Aster, Sunflower, or Composite Family (Asteraceae)
Blooms: May through July
Facts: Annual or biennial. Disturbed areas. Not native. Invasive.


Photos by Sue Dekalb © 2012
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