Polygonum alpinum subsp. alaskanum (Small) S.L. Welsh

Polygonum alpinum subsp. alaskanum (Small) S.L. Welsh is a synonym sensu FNA Ed. Comm., 2005 of:

Koenigia alaskana (Small) T.M. Schuster & Reveal var. alaskana, an accepted variety name sensu Schuster et al., 2015.