Cypripedium calceolus, commonly known as Lady's Slipper or Yellow Lady's Slipper, has several synonyms that are used interchangeably. These synonyms include Cypripedium parviflorum var. pubescens, Cypripedium pubescens, Cypripedium parviflorum subsp. pubescens, and Cypripedium luteum. Lady's Slipper is a type of orchid that is native to North America and is known for its distinctive yellow and brown flower. It can be found in wooded areas, bogs, and swamps and has been used for medicinal purposes by Indigenous communities. The various synonyms for Cypripedium calceolus reflect the ongoing taxonomic classification of this species and the complexities of defining plant species.