Arctagrostis latifolia subsp. nahanniensis A.E. Porsild

Arctagrostis latifolia subsp. nahanniensis A.E. Porsild is a synonym sensu Soreng et al., 2000+ of:

Arctagrostis latifolia (R. Brown) Grisebach subsp. latifolia, an accepted subspecies name sensu FNA Ed. Comm., 2007.