Cypripedium parviflorum

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Cypripedium parviflorum
Cypripedium parviflorum var. makasin
Mackinac Island, Michigan
Scientific classification e
Kingdom: Plantae
Clade: Angiosperms
Clade: Monocots
Order: Asparagales
Family: Orchidaceae
Subfamily: Cypripedioideae
Genus: Cypripedium
Species: C. parviflorum
Binomial name
Cypripedium parviflorum
  • 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[2] or moccasin flower,[3] is a lady's slipper orchid native to North America.[1] It is widespread, ranging from Alaska south to Arizona and Georgia.[4]


C. parviflorum is a highly variable species, which is a result of both hybridization and phenotypic plasticity.[5]

Four varieties are widely recognized. They are:[6]

  • C. parviflorum var. exiliens SheviakAlaska
  • C. parviflorum var. makasin (Farwell) Sheviak – commonly called the "northern yellow lady's-slipper";[7] widely distributed over much of Canada and the northern United States
  • C. parviflorum var. parviflorum – commonly called the "small yellow lady's-slipper";[8] 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";[8] very widespread across much of United States, Canada, and St. Pierre & Miquelon; treated by many authors as a distinct species, Cypripedium pubescens


  1. ^ a b Kew World Checklist of Selected Plant Families
  2. ^ Cypripedium parviflorum New Endland Wildflower Society
  3. ^ Voitk, A & M. (2006) Orchids on the Rock: The Orchids of Newfoundland, Rocky Harbour, NL: Gros Morne Co-operating Association.
  4. ^ Cypripedium parviflorum distribution map Flora of North America
  5. ^ Cypripedium parviflorum Flora of North America
  6. ^ Cypripedium parviflorum North American Orchid Center
  7. ^ Northern Yellow Lady's-slipper (Cypripedium parviflorum var. makasin) Wisconsin Department of Natural Resources
  8. ^ a b Alan Weakley (2015). "Flora of the Southern and Mid-Atlantic States". 

External links[edit]