Working party on Taxonomy, Nomenclature and Registration

Populus ×canadensis ‘I-214’ stand in the Bormida river valley (Alessandria, Italy) - Photo by L. Vietto Salix alba stand near Minsk, Belarus - Photo by J. Kuzovkina  

The International Poplar Commission (IPC) is appointed as the International Cultivar Registration Authority (ICRA) for the genus Populus and as the International Cultivar Registration Authority (ICRA) for the genus Salix by the Commission for Nomenclature and Cultivar Registration of the International Society for Horticultural Science (ISHS).

The working party on Taxonomy, Nomenclature and Registration acts as the ICRA for both genera on behalf of IPC.

Officers of the WP1 are:

Julia Kuzovkina (USA), Chairperson
University of Connecticut
Storrs-Mansfield, CT 06269
United States of America
Tel: (1-860) 4863438 
E-mail: [email protected]

Lorenzo Vietto (Italy), Vice-Chairperson
CREA, Unità di Ricerca per le Produzioni Legnose Fuori Foresta (PLF)
Strada Frassineto 35
15033 Casale Monferrato (AL)
Tel: (39-0142) 330916
E-mail: [email protected]


Tasks of the Working party

  • To publish the International Register of Populus Cultivars and the International Register of Salix Cultivars.
  • To publish Checklists of all known epithets and commercial synonyms for cultivars of Populus L. and Salix L.
  • To accept registration the new cultivars must be appropriately named following the rules of the International Code of Nomenclature for Cultivated Plants (ICNCP).
  • To update, amend and reissue the Registers periodically.
  • To publicize the registration procedure for Populus and Salix cultivars to the widest appropriate audience.
  • To cooperate with statutory plant registration authorities regarding the cultivar epithets for Populus L. and Salix L.

The importance of registering cultivar names with ICRA 

How to name a new cultivar 

Registration of Poplar cultivars

Registration of Willow Cultivars

Publications of the Working party




last updated:  Wednesday, January 20, 2021