Atlas of North European vascular plants
Hultén & Fries 1986
1877 Tragopogon heterospermus Schweigg.
Syn.: T. floccosus Waldst. & Kit. subsp. heterospermus (Schweigg.) C. Regel
This species is restricted to the SE. Baltic region. Same very closely related (apomictic?) taxa (T. brevirostris DC., T. floccosus Waldstr. & Kit., T. podolicus DC., T. dasyrhynchus Artemczuk, T. volgensis S. Nikit., T. eliator Steven etc.) occur in the E. European and W. Asiatic area, approximately marked on the map.