Invasive Thistle on the Phantom Trail

Milk thistle (Silybum marianum)

Some invasive plants, such as this milk thistle (Silybum marianum) on the Phantom Trail in Malibu Creek State Park, appear to respond disproportionately to above average rainfall and become particularly large and prolific.

From Sunday’s trail run.

Related posts: Convoluted, Milk Thistle Seed Heads