Scientific Name: Cirsium horridulum Michx.

Caption: Illustration of Cirsium horridulum

Photographer: Britton, Nathaniel Lord and Addison Brown. An Illustrated Flora of the Northern United States, Cana

Image Source: http://compositae.lifedesks.org/node/76

Notes: Illustration of Cirsium horridulum

Full citation below:

Britton, Nathaniel Lord and Addison Brown.  An Illustrated Flora of the Northern United States, Canada and the British Possessions.  Vol 3.  Charles Scribner's Sons.  1913. 

Copyright: http://creativecommons.org/licenses/by-nc/3.0/

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