The classification of our native yellow lady's-slippers has not been settled. Formerly, they were considered to be the same species as Eurasian yellow lady's-slippers -- Cypripedium calceolus. The modern trend is to separate the American plants from the Eurasian, but the number of American species is under debate. Some botanists recognize two species in northeastern U.S. -- Cypripedium parviflorum and Cypripedium pubescens, but these species are defined differently by different authorities.
• Family: Orchid (Orchidaceae)
• Habitat: bogs, shady swamps, wet woods
• Height: 18-24 inches
• Flower size: yellow lip petal 1 to 2 inches long
• Flower color:
• Flowering time: May to June
• Origin: native