The flower heads are slender (for a thistle), up to 2 inches (5 cm) long, and surrounded by spine-tipped bracts. The leaves are alternate, narrowly egg-shaped, and pinnately-lobed with spiny teeth.
Santa Catalina Mountains
Chihuahua Pines Picnic Area
Location: Near wash northeast of picnic tables.
6/13/16, 6/25/19