Canada thistle

Creeping Thistle (Cirsium arvense).

Introduced rhizomatous perennial often about 1 m tall, with relatively small flowering heads (involucre less than 2 cm high), leaves not densely woolly on either the upper or lower surface, moist disturbed sites from low elevation open areas to open montane understory.

Cirsium arvense

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Uploaded on Jan 31, 2011

This is part of a series of videos providing key characteristics for the identification of invasive plants listed in Wisconsin's invasive species administrative rule NR 40. These videos are produced by Dr. Mark Renz of the University of Wisconsin-Madison. For more information on invasive plants and invasive plant management in Wisconsin visit http://ipcm.wisc.edu/Publications/WeedSciencepublications/tabid/116/Default.aspx

Uploaded on Sep 21, 2009

Good things from Canada: Rush, Justin Morneau, Tuquks. Bad things from Canada: Anne Murrary, Canada Thistle. Just kidding about Canada Thistle. We'll show you how to kill this weed in this week's weed of the week.

Uploaded on Aug 11, 2009

KAXE Phenologist John Latimer talks about the Canada Thistle, one of two common types of tall thistle in Northern MN.

Uploaded on Aug 13, 2009

Professional Horticulturist and Master Gardener Ellen Nibali identifies the Canada Thistle (cirsium arvense) and explains how to remove this invasive plant from your garden.

Click here to read our publication on invasive species for even more information: http://www.hgic.umd.edu/_media/documents/publications/hg88.pdf

This video is brought to you by the Home and Garden Information Center, part of University of Maryland Extension. Learn about our Grow It Eat It campaign, which provides resources and encourages people to start their own food gardens. http://www.growit.umd.edu/

Check out our facebook page for more gardening advice: http://www.facebook.com/UMDHGIC#!/GIEIMaryland

Intro Credit: "Invasion of the Body Snatchers: (1956); Allied Artists. Music and shot of woman screaming used here in accordance with Fair Use.

Shot and Edited by: Alix Watson and Emily Heimsoth