Cirsium congestum DC., Prodr. 6: 641. 1838 Cirsium congestum DC., Prodr. 6: 641. 1838is basionym for Cirsium sorocephalum subsp. congestum (DC.) Yıldız, Dirmenci & Arabacı in Güner & al., Türk. Bitkileri List.: 145. 2012Taxon for this nameCirsium congestum DC., Prodr. 6: 641. 1838