Synonyms
Aster alpigenus subsp. haydenii (Porter) Cronquist
Oreostemma alpigenum subsp. haydenii (Porter) Semple
Aster alpigenus var. haydenii (Porter) Cronquist
Oreastrum haydenii (Porter) Rydb.
Aster haydenii Porter
Oreostemma haydenii (Porter) Greene