Cypripedium kentuckiense

Cypripedium kentuckiense, the Kentucky lady's slipper or southern lady's slipper, is a member of the orchid genus Cypripedium. Members of this genus are commonly referred to as lady's slipper orchids.

Cypripedium kentuckiense

Vulnerable  (NatureServe)[1]
Scientific classification
Kingdom: Plantae
Clade: Tracheophytes
Clade: Angiosperms
Clade: Monocots
Order: Asparagales
Family: Orchidaceae
Subfamily: Cypripedioideae
Genus: Cypripedium
Species:
C. kentuckiense
Binomial name
Cypripedium kentuckiense
C.F.Reed

Originally thought to be an aberrant form of Cypripedium parviflorum var. pubescens, the morphology of C. kentuckiense suggests it is a species of its own. However, molecular evidence suggests that C. kentuckiense is more closely related to Cypripedium parviflorum var. parviflorum than it is to Cypripedium parviflorum var. pubescens.

Description

C. kentuckiense has the largest flower of in the genus Cypripedium. The petals and sepals are greenish striped and mottled with purple while the very large lip, or pouch, is a creamy ivory or pale yellow. The plant can be up to 70 cm tall and has bract leaf-like leaves that are up to 12 cm long. Each plant is usually single-flowered.

  • Cypripedium kentuckiense

Range

Cypripedium kentuckiense is found in a large swathe through the central portion of the United States including Texas, Mississippi, Kentucky, Ohio, Missouri, Arkansas, Oklahoma, Louisiana, and Tennessee. Additionally, there is a small patch in Lancaster County, Virginia.[2][3][4] However, the range of this species is not continuous; it mostly consists of relatively isolated patches. It is most often found in deep ravines on acidic and sandstone soils.

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References
  1. Cypripedium kentuckiense NatureServe
  2. US Department of Agriculture plants profile
  3. Biota of North America Program, county distribution map
  4. Digital Atlas of the Virginia Flora, Cypripedium kentuckiense C.F.Reed
  • Phillip Cribb & Peter Green (1997). The Genus Cypripedium (a botanical monograph). Kew Royal Botanic Gardens, Timber Press ISBN 0-88192-403-2
  • Case, M.A, H.T. Mlodozeniec, L.E. Wallace, and T.W. Weldy. 1998. Conservation genetics and taxonomic status of the rare Kentucky Lady's Slipper: Cypripedium kentuckiense (Orchidaceae). American Journal of Botany, vol. 85, num. 12: 1779-1786
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