Poa arctica subsp. williamsii (Nash) Hultén
Poa arctica subsp. williamsii (Nash) Hultén is a synonym sensu FNA Ed. Comm., 2007 of:
Poa arctica R. Brown subsp. arctica, an accepted subspecies name sensu FNA Ed. Comm., 2007.
Poa arctica subsp. williamsii (Nash) Hultén is a synonym sensu FNA Ed. Comm., 2007 of:
Poa arctica R. Brown subsp. arctica, an accepted subspecies name sensu FNA Ed. Comm., 2007.