Wedgeleaf primrose is a small alpine herb with pink flowers and broad-stemmed basal leaves that grows in moist tundra and meadows. Plants grow 2-10 cm tall from fibrous roots. The leaves are all basal, broad-petioled, oblanceolate to cuneiform, with the upper third dentate, 1-8 cm long. The stem is leafless and relatively stout, bearing 1-4 flowers. The pedicels are 3-20 mm long, bending. Flowers are homostylous (all plants have the same length of stamens and styles), unusual for a Primula. The calyx is 3-6 mm long, with triangular lobes, and the five pink petals are 1-2 cm across. Each petal is lobed into two sections, pink to violet in color. Plants do not have farina (a dusty-white covering), a diagnostic character for some members of the genus. This is the most common primrose in the park, distinguished by its oblanceolate leaves with toothed upper margin, and very small stature.
Wedgeleaf primrose is perennial. It flowers in early to mid-summer.
Primula cuneifolia subsp. saxifragifolia is monoecious with bisexual flowers. The genus Primula is typically insect-pollinated, but P. eximia is self-fertilizing. Unlike many species in the genus, arctic primrose has homostylous flowers (styles as the same length as the stamens), which allow it to self-fertilize. This is what distinguishes this subspecies from P. cuneifolia subsp. cuneifolia (Kelso 1992).
Primula cuneifolia spp. saxifragifolia is an amphi-Beringian endemic, occurring in Alaska and adjacent Eurasia and British Columbia. This species occurs in the southern half of Alaska: from coastal Seward Peninsula, through the southwestern coast to the Kuskokwim Mtns., Alaska Range, west through the Aleutian chain, east to the Kenai and Chugach Mtns., and south to Vancouver Island. This species farthest inland localities are in Denali, including sites both south and north of the Alaska Range crest, and in the Kantishna Hills.