Caption: Illustration of Cirsium horridulum
Photographer: Britton, Nathaniel Lord and Addison Brown. An Illustrated Flora of the Northern United States, Cana
Notes: Illustration of Cirsium horridulum<br><p><strong>Full citation below: </strong></p><p>Britton, Nathaniel Lord and Addison Brown. <span style='text-decoration: underline;'>An Illustrated Flora of the Northern United States, Canada and the British Possessions</span>. Vol 3. Charles Scribner's Sons. 1913. </p>