Gray, A. (1883). Contributions to North American Botany. I. Characters of new Compositae, with revisions of certain genera, and critical notes. <em>Proc. Amer. Acad. Arts.</em> 19: 1-96. page(s): 57 [details]
Compositae Working Group (CWG) (2021). Global Compositae Database. Cnicus grahamii A.Gray. Accessed at: https://www.compositae.org/aphia.php?p=taxdetails&id=1180712 on 2024-05-06
original descriptionGray, A. (1883). Contributions to North American Botany. I. Characters of new Compositae, with revisions of certain genera, and critical notes. <em>Proc. Amer. Acad. Arts.</em> 19: 1-96. page(s): 57 [details]