Hieracium aphyllum subsp. singulare
Synonymy
Source: Greuter, W. (2006+): Compositae (pro parte majore). – In: Greuter, W. & Raab-Straube, E. von (ed.): Compositae. Euro+Med Plantbase - the information resource for Euro-Mediterranean plant diversity.
Hieracium aphyllum subsp. singulare in Reichenbach, Icon. Fl. Germ. Helv. 19(2): 69. 1906
Content
Bibliography
A. Ascherson, P. F. A. & Graebner, K. O. R. P. P. 1930–1935: Synopsis der mitteleuropäischen Flora 12(2) [Zahn, K. H.]. – Leipzig (as Hieracium aphyllum subsp. neosingulare)