General Plant Information (Edit)
Plant Habit: Herb/Forb
Life cycle: Annual
Sun Requirements: Full Sun to Partial Shade
Water Preferences: Dry Mesic
Plant Height: 12 to 24 inches (30-60 cm)
Flower Color: Yellow
Flower Time: Spring
Late spring or early summer
Summer
Late summer or early fall
Underground structures: Taproot
Suitable Locations: Xeriscapic
Uses: Will Naturalize
Pollinators: Various insects
Miscellaneous: With thorns/spines/prickles/teeth

Image
Common names
  • Maltese Star Thistle
  • Napa Star Thistle
  • Malta Star Thistle
  • Cockspur Thistle

Photo Gallery
Location: Pasture
Date: 2023-05-08
Highly invasive!!!
Location: Santa Monica Mountains National Recreation Area, California
Date: 2012-05-25
Location: Santa Monica Mountains National Recreation Area, California
Date: 2009-12-05
Location: Santa Monica Mountains National Recreation Area, California
Date: 2010-02-12
Location: Santa Monica Mountains National Recreation Area, California
Date: 2012-08-04
Location: Santa Monica Mountains National Recreation Area, California
Date: 2010-04-09
Location: Santa Monica Mountains National Recreation Area, California
Date: 2011-05-21

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