Hieracium praecox subsp. billetianum Zahn Syn. Mitteleur. Fl. 12(2): 295 (1931)

Nomenclatural References

• literature : Syn. Mitteleur. Fl. [Ascherson & Graebner] 12(2): 295. 1931 BHL link from IPNI metadata.
• person : Karl Hermann Zahn (1865-1940) Based on occurrence of standard abbreviation 'Zahn' in the authors string.
• database : IPNI record: 77095915-1