A polyploid complex was described by E. B. Babcock and G. Ledyard Stebbins in their 1938 monograph The American Species of Crepis: their interrelationships and distribution as affected by polyploidy and apomixis.
A poliploid komplexet először E. B. Babcock és G. Ledyard Stebbins írták le, 1938-as monográfiájukban (The American Species of Crepis: their interrelationships and distribution as affected by polyploidy and apomixis).