Another introduction from Europe and Asia.  It is a biennial plant here but is said to require only one year in warmer climates.Musk Thistle (Carduus nutans)

The bud ready to explode into flower.Musk Thistle (Carduus nutans) Starting to Bloom

Because the head nods it is also called the Nodding Thistle.Musk Thistle (Carduus nutans)

Musk Thistle (Nodding Thistle) (Carduus nutans)

A field of Musk Thistle.Musk Thistle (Carduus nutans)

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