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]

Cypripedium parviflorum
Cypripedium parviflorum var. makasin Mackinac Island, Michigan
Scientific classification
Kingdom:	Plantae
Clade:	Tracheophytes
Clade:	Angiosperms
Clade:	Monocots
Order:	Asparagales
Family:	Orchidaceae
Subfamily:	Cypripedioideae
Genus:	Cypripedium
Species:	C. parviflorum
Binomial name
Cypripedium parviflorum Salisb.
Synonyms[1]
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

Taxonomy

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 Sheviak – Alaska
• 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

• 
  C. parviflorum var. parviflorum, showing pubescent bract and dark maroon sepals
• 
  C. parviflorum var. pubescens, showing yellow-green sepals spotted with maroon

References

External links

• Media related to Cypripedium parviflorum at Wikimedia Commons
• Data related to Cypripedium parviflorum at Wikispecies

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[es] Cypripedium parviflorum

[ru] Башмачок мелкоцветковый