Linnaeus, C. (1753). Species plantarum, exhibentes plantas rite cognitas ad genera relatas cum differentiis specificis, nominibus trivialibus, synonymis selectis, locis natalibus, secundum systema sexuale digestas. Vol 1. Salvius, Stockholm., available online athttps://www.biodiversitylibrary.org/page/358012 page(s): 822 [details]
Compositae Working Group (CWG) (2025). Global Compositae Database. Carduus cyanoides var. polyclonos L.. Accessed at: https://www.compositae.org/gcd/aphia.php?p=taxdetails&id=1227864 on 2025-09-13
original descriptionLinnaeus, C. (1753). Species plantarum, exhibentes plantas rite cognitas ad genera relatas cum differentiis specificis, nominibus trivialibus, synonymis selectis, locis natalibus, secundum systema sexuale digestas. Vol 1. Salvius, Stockholm., available online athttps://www.biodiversitylibrary.org/page/358012 page(s): 822 [details]