**Description:** A tall, biennial plant covered in sharp prickles; features large, rounded purple flower heads protected by spiny bracts.
**Size:** Reaches heights of 3 to 6 feet.
**Wildlife Value:** A premier nectar source for Monarch and Swallowtail butterflies. Goldfinches rely on the seeds for food and the fluff to line nests.
**Identification:** Distinguished from native thistles by the spiny "wings" that run down the length of the stem.
**Habitat:** Open meadows, pastures, and along sunny forest roads.