(ofCarduus acaulis L.)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 2. Salvius, Stockholm., available online athttps://www.biodiversitylibrary.org/page/358580 page(s): 1199 [details]
Compositae Working Group (CWG) (2025). Global Compositae Database. Polyacantha acaulis (L.) Hill. Accessed at: https://www.compositae.org/gcd/aphia.php?p=taxdetails&id=1192944 on 2025-09-13
original descriptionHerb. Brit. [Hill] 1 page(s): 71 [details]
original description(ofCarduus acaulis L.)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 2. Salvius, Stockholm., available online athttps://www.biodiversitylibrary.org/page/358580 page(s): 1199 [details]