Ackerfield, J. (2022). Hiding in plain sight: Two new species of alpine thistles, Cirsium culebraensis and C. funkiae (Cardueae) from the southern Rocky Mountains (United States). <em>The International Compositae Alliance.</em> 1(1): 7, figs. 3-5, photogrs., available online athttps://doi.org/10.53875/capitulum.01.2.01[details]
Compositae Working Group (CWG) (2025). Global Compositae Database. Cirsium culebraense Ackerf.. Accessed at: https://www.compositae.org/gcd/aphia.php?p=taxdetails&id=1665364 on 2025-03-26
original descriptionAckerfield, J. (2022). Hiding in plain sight: Two new species of alpine thistles, Cirsium culebraensis and C. funkiae (Cardueae) from the southern Rocky Mountains (United States). <em>The International Compositae Alliance.</em> 1(1): 7, figs. 3-5, photogrs., available online athttps://doi.org/10.53875/capitulum.01.2.01[details]