Hieracium caesium var. ratisbonense Zahn Syn. Deut. Schweiz. Fl. : 1793 (1901)

Nomenclatural References

• literature : Syn. Deut. Schweiz. Fl., ed. 3 [Hallier & Brand] 1793. 1901 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: 77139194-1