Broomrape, Northern Groundcone, Poque: Boschniakia rossica (Synonyms: Boschniakia glabra, Orobanche glabra, Orobanche rossica)
The following species are members of the figwort family which have now been included in the broomrape family:
Pale Indian Paintbrush, Port Clarence Indian Paintbrush: Castilleja caudata var. caudata (Synonyms: Castilleja pallida ssp. caudata, Castilleja pallida var. caudata)
Elegant Indian Paintbrush, Elegant Paintbrush, Red Paintbrush: Castilleja elegans (Synonyms: Castilleja pallida ssp. elegans, Castilleja pallida var. elegans)
Polar Eyebright: Euphrasia disjuncta (Synonyms: Euphrasia arctica var. disjuncta, Euphrasia subarctica) - There are collections of this species from the Park but range maps from the USDA website show that it is found in eastern Canada, so I don't know why there's a discrepency between scientific name and range.
Capitate Lousewort: Pedicularis capitata (Synonym: Pedicularis nelsonii)
Labrador Lousewort: Pedicularis labradorica var. labradorica (Synonym: Pedicularis euphrasioides)
Bumble-bee Flower, Woolly Lousewort: Pedicularis lanata (Synonyms: Pedicularis kanei, Pedicularis lanata ssp. yukonensis, Pedicularis wildenowii)
Arctic Lousewort, Langsdorf Lousewort, Langsdorf's Lousewort: Pedicularis langsdorfii (ssp. arctica or ssp. langsdorfii ?)
Crimson-tipped Lousewort, Oeder's Lousewort: Pedicularis oederi (Synonym: Pedicularis versicolor)
Fernweed, Sudeten Lousewort, Sudetic Lousewort: Pedicularis sudetica (varieties albolabiata, interioides, interior, or pacifica ?)
Verticillate Lousewort, Whorled Lousewort: Pedicularis verticillata (Synonym: Pediculariopsis verticillata)
Arctic Rattlebox, Yellow Rattle: Rhinanthus minor ssp. groenlandicus (Synonyms: Rhinanthus arcticus, Rhinanthus borealis, Rhinanthus groenlandicus, Rhinanthus minor ssp. borealis) - I am unsure whether this species is found inside Denali National Park, but there is a chance it could be in the vicinity of the park entrance.