Cypripedium parviflorum

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Cypripedium parviflorum
Cypripedium parviflorum var. makasin
Mackinac Island, Michigan
Scientific classification edit
Kingdom: Plantae
Clade: Tracheophytes
Clade: Angiosperms
Clade: Monocots
Order: Asparagales
Family: Orchidaceae
Subfamily: Cypripedioideae
Genus: Cypripedium
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] It grows in fens, wetlands, shorelines, and damp woodlands.[5]


C. parviflorum is a highly variable species, which is a result of both hybridization and phenotypic plasticity.[6]

Four varieties are widely recognized. They are:[7]

  • C. parviflorum var. exiliens SheviakAlaska
  • C. parviflorum var. makasin (Farwell) Sheviak – commonly called the "northern yellow lady's-slipper";[8] widely distributed over much of Canada and the northern United States
  • C. parviflorum var. parviflorum – commonly called the "small yellow lady's-slipper";[9] 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";[9] 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 "Cypripedium parviflorum". World Checklist of Selected Plant Families (WCSP). Royal Botanic Gardens, Kew.
  2. ^ "Cypripedium parviflorum". Go Botany. New England Wildflower Society.
  3. ^ Voitk, Andrus; Voitk, Maria (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. ^ "Burke Herbarium Image Collection". Retrieved 2022-07-15.
  6. ^ Sheviak, Charles J. (2002). "Cypripedium parviflorum". In Flora of North America Editorial Committee (ed.). Flora of North America North of Mexico (FNA). Vol. 26. New York and Oxford – via, Missouri Botanical Garden, St. Louis, MO & Harvard University Herbaria, Cambridge, MA.
  7. ^ "Cypripedium parviflorum". North American Orchid Conservation Center (NAOOC), Smithsonian Environmental Research Center. 2018.
  8. ^ "Northern Yellow Lady's-slipper (Cypripedium parviflorum var. makasin)". Wisconsin Department of Natural Resources.
  9. ^ a b Weakley, Alan (2015). "Flora of the Southern and Mid-Atlantic States". Archived from the original on 2018-10-06. Retrieved 2018-01-23.

External links[edit]