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Bull thistle is an annual or biennial, herbaceous plant that invades disturbed areas throughout the United States. The spiny, spreading, winged stems are up to 7 ft. (2.1 m) tall. Leaves are 3-12 in. (7.6-30.5 cm) long, lance-shaped and very hairy.
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www.invasive.org/browse/subject.cfm?sub=3393
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Bull thistle stem leaves are more or less lance-shaped and; 3 to 12 inches long, prickly hairy on the top and very hairy underneath. Lobes on leaves are tipped with stout spines. ... Bull thistle flowerheads are 1.5 to 2 inches in diameter, 1 to 2 inches long, usually solitary, and more or less clustered at the ends of...
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www.invasive.org/weedcd/pdfs/wow/bull-thistle.pdf
www.invasive.org/weedcd/pdfs/wow/bull-thistle.pdf
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Bull thistle is native to Europe. ... Bull thistle can be found along in many prairies, dry pastures and roadsides in the Redwood National and State Parks. ... Although bull thistle is a biennial plant, infestations persist for years in grassy areas to the exclusion of other herbaceous plants due to the buildup of buried seed.
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www.nps.gov/redw/bullthis.htm
www.nps.gov/redw/bullthis.htm
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Cirsium vulgare - Wikipedia, the free encyclopedia
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Cirsium vulgare ( Spear Thistle , Bull thistle , Plumed thistle , Roadside thistle ; syn. C. lanceolatum ) is a species of the genus Cirsium , native throughout Europe, Asia and norther...
en.wikipedia.org/wiki/Cirsium_vulgare
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Bull Thistle, Common Thistle, Spear Thistle ... The leaves of the Bull Thistle are alternating and have simple blades. The leaf blades of the rosette are frequently bifid with pointed tips and are elliptic to ovate. They also may be unlobed to pinnately lobed with margins that are toothed and tipped with spines.
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alfalfa.okstate.edu/webnews/bullthistle.htm
alfalfa.okstate.edu/webnews/bullthistle.htm
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WELCOME TO OUR HIKING CLUB! ... The FLT Bullthistle Hikers Club Objectives Include The Following: ... Home About Us Hike Gallery Calendar Announcements Membership Contact Us Links...
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www.bullthistlehiking.org/
www.bullthistlehiking.org/
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A PLANTS profile of Cirsium vulgare (bull thistle) from the USDA PLANTS database ... Cirsium vulgare (Savi) Ten. bull thistle; ... bull thistle common thistle spear thistle; Cirsium thistle; Cirsium lanceolatum bull thistle;
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plants.usda.gov/java/profile?symbol=CIVU
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At 4 - 5 centimetres, bull thistle's large, bright pink (to dark purple) flowers are hard to miss. Blooms form at the ends of branches, supported by equally large, spine-covered bracts. Deeply divided leaves have stout spines at the ends and at the tips of each segment.
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www.weedsbc.ca/weed_desc/bull_thistle.html
www.weedsbc.ca/weed_desc/bull_thistle.html
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Range & Habitat: The Bull Thistle is a common plant that occurs in most counties of Illinois (see Distribution Map). It is adventive from Eurasia, and has existed in the United States since the 19th century, if not earlier.
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www.illinoiswildflowers.info/weeds/plants/bull_thistle....
www.illinoiswildflowers.info/weeds/plants/bull_thistle.htm
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