Bull Thistle Identification and Management - Penn State Extension
Learn how to distinguish bull thistle (Cirsium vulgare) from Canada thistle and how to control it in turf and landscape. Bull thistle is a biennial with spiny leaves and pink to purple flowers that reproduces only from seeds.
Identification and Management of Bull Thistle
Bull thistle, also called spear thistle, is a biennial weed native to Eurasia and widely established in North America. Learn how to identify, prevent, and control this spiny plant that competes with native and agricultural plants.
Cirsium vulgare - Wikipedia
Cirsium vulgare, also known as spear thistle, bull thistle, or common thistle, is a plant native to Europe, Asia and Africa. It is a tall thistle with spiny leaves and purple flowers, and is the national flower of Scotland.
Bull Thistle | Cornell Weed Identification
Learn how to identify Bull Thistle, a biennial weed with spiny leaves and purple flowers, and how to control it chemically or non-chemically. See photos of Bull Thistle seedlings, leaves, stems, flowers, and seeds.
Bull thistle | College of Agricultural Sciences - Oregon State …
Bull thistle is a noxious weed that forms rosettes the first year and branches the second year. It has dark green, spiny leaves and bright pink, gumdrop shaped flowers with cottony seeds.
Bull thistle - Extension at the University of Minnesota
Bull thistle is a biennial herbaceous plant that grows up to seven feet tall and has spiny leaves and flower heads. It colonizes disturbed areas and is not eaten by livestock. Learn how to identify and report bull thistle in Minnesota.
Bull thistle . Family: Asteraceae . Range: Found in every state in the U.S. Habitat: Disturbed areas including rangeland, pastures, forest clearcuts, roadsides and waste areas. Also occurs in foothills, dry meadows and riparian areas. Origin: Native to Europe. Impact: Bull thistle is not palatable to livestock and reduces the forage
BULL THISTLE Common name(s): Bull thistle, spear thistle Scientific name: Cirsium vulgare Family: Sunflower or Aster family (Asteraceae) Reasons for concern: This aggressive and persistent species can quickly take over both disturbed and unattended areas, and outcompete native species, reducing plant diversity and wildlife habitat.
Bull thistle identification and control - King County
Bull thistle is a widespread biennial (2-year life cycle) thistle originally from Europe and Asia, but now introduced throughout North America. It can grow 2 to 6 feet tall. Leaves are deeply lobed and hairy. There are coarse hairs on leaf tops, making leaf feel rough to the touch, and woolly hairs on the underside. Long, sharp spines grow on ...
Bull thistle | AZ Invasive Plants - University of Arizona
Bull thistle is highly competitive and aggressive, and forms dense colonies that choke out native vegetation important to wildlife and pollinators. Seeds germinate rapidly and are spread by wind. An individual plant can produce up to 100,000 seeds. Many native thistles can look similar to …