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Cypripedium parviflorum
Parviflorum.jpg
Cypripedium parviflorum var. makasin
Mackinac Island, Michigan
Scientific classification
Genus:
Cypripedium
Species:
parviflorum
Synonyms
  • Cypripedium luteum var. parviflorum (Salisb.) Raf.
  • Criosanthes parviflora (Salisb.) Raf.
  • Calceolus parviflorus (Salisb.) Nieuwl.
  • Cypripedium calceolus var. parviflorum (Salisb.) Fernald
  • Cypripedium hirsutum var. parviflorum (Salisb.) Rolfe
  • Cypripedium bulbosum var. parviflorum (Salisb.) Farw.
  • Cypripedium calceolus subsp. parviflorum (Salisb.) Hultén

Cypripedium parviflorum, commonly known as yellow lady's slipper or moccasin flower, is a lady's slipper orchid native to North America. It is widespread, ranging from Alaska south to Arizona and Georgia.

Taxonomy

C. parviflorum is a highly variable species, which is a result of both hybridization and phenotypic plasticity.

Four varieties are widely recognized. They are:

  • C. parviflorum var. exiliens SheviakAlaska
  • C. parviflorum var. makasin (Farwell) Sheviak – commonly called the "northern yellow lady's-slipper"; widely distributed over much of Canada and the northern United States
  • C. parviflorum var. parviflorum – commonly called the "small yellow lady's-slipper"; southern part of the species range, from eastern Nebraska and eastern Oklahoma east to Virginia and New Hampshire
  • C. parviflorum var. pubescens (Willdenow) O. W. Knight – commonly called the "large yellow lady's-slipper"; very widespread across much of United States, Canada, and St. Pierre & Miquelon; treated by many authors as a distinct species, Cypripedium pubescens
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