Carduus tenuiflorus was first described and published in Flora Londinensis 2(6): t. 55 (168,169). 1793. Germplasm Resources Information Network. «Carduus tenuiflorus information from NPGS/GRIN». Taxonomy for Plants. National Germplasm Resources Laboratory, Beltsville, Maryland: United States Department of Agriculture, Agricultural Research Service, National Genetic Resources Program, 09-05-2011. Arxivat de l'original el 18 de desembre 2011. [Consulta: 9 juny 2013].
Carduus tenuiflorus was first described and published in Flora Londinensis 2(6): t. 55 (168,169). 1793. Germplasm Resources Information Network. «Carduus tenuiflorus information from NPGS/GRIN». Taxonomy for Plants. National Germplasm Resources Laboratory, Beltsville, Maryland: United States Department of Agriculture, Agricultural Research Service, National Genetic Resources Program, 09-05-2011. Arxivat de l'original el 18 de desembre 2011. [Consulta: 9 juny 2013].