General Plant Information (Edit)
Plant Habit: Herb/Forb
Life cycle: Perennial
Sun Requirements: Partial or Dappled Shade
Partial Shade to Full Shade
Water Preferences: Mesic
Soil pH Preferences: Moderately acid (5.6 – 6.0)
Slightly acid (6.1 – 6.5)
Minimum cold hardiness: Zone 3 -40 °C (-40 °F) to -37.2 °C (-35)
Maximum recommended zone: Zone 8b
Plant Height: 6 to 15 inches
Flowers: Showy
Fragrant
Flower Color: Pink
Bloom Size: 2"-3"
Flower Time: Spring
Late spring or early summer
Summer
Underground structures: Rhizome
Wildlife Attractant: Bees
Toxicity: Other: Glandular hairs on the leaves and stems can cause a rash, similar to that caused by poison ivy, upon contact.
Propagation: Seeds: Other info: Require approximately 6 to 8 years to reach flowering size.
Propagation: Other methods: Division
Pollinators: Bees
Various insects
Containers: Needs excellent drainage in pots
Awards and Recognitions: Other: Provincial Flower of Prince Edward Island, Canada

Image
Common names
  • Moccasin Flower
  • Stemless Lady's Slipper
  • Nerve Root
  • Whippoorwill Moccasin
Botanical names
  • Accepted: Cypripedium acaule
  • Synonym: Cypripedium acaule f. biflorum
  • Synonym: Cypripedium acaule f. albiflora

Photo Gallery
Location: Cook, Minnesota
Date: 06/28/2009
photo by Captain Tenneal via Flickr: https://www.flickr.com/photo
Location: Central Pennsylvania
Date: 2020-05-16
Near a pond in wooded area

Date: 2005-05-27
Cypripedium acaule f. albiflora in its native habitat
Location: Caribou Maine
Date: June 2018
Location: My garden in the Northeast.
Date: 2005-06-02
Location: Ramapo National Park, NJ
Date: 2023-05-18
Location: Ramapo National Park, NJ
Date: 2023-05-18
Uploaded by Ursula

Date: c. 1898
illustration from Gibson's 'My Studio Neighbors', 1898
Location: Caribou Maine
Date: June 2018
Location: Interlochen, MI
Date: 2011-06-01
Location: Maine Woods
Date: 4000-06-04
Location: Michaux State Forest 
Date: 2021-05-27
Location: Western North Carolina
Posted with permission and photographed by Clint Calhoun
  • Uploaded by vic
Location: New Braintree, MA
Date: 2012-06-10
Location: Michaux State Forest 
Date: 2021-05-27

Date: 2005-05-27
Cypripedium acaule f. albiflora
Location: Interlochen, MI
Date: 2012-05-10
Uploaded by Ursula

Date: 2012-05-08
Location: Mason, New Hampshire (zone 5b)
Date: 2012
One of our wild Lady Slippers.  We have about 8 that grow along t
Location: Michaux State Forest 
Date: 2021-05-27
Moccasin flowers are darker this year than last
Location: Maine
Date: 2013-05-30
Pink lady's-slipper is the most common lady's-slipper in Maine.

Photo: Deborah Veen
Uploaded by Ursula
Uploaded by Ursula
Uploaded by Ursula
Uploaded by Ursula
Uploaded by Ursula
Location: Hollis, New Hampshire
Date: June 8, 2013
Uploaded by Ursula
Uploaded by SongofJoy

White form
Uploaded by SongofJoy
Uploaded by SongofJoy
Location: Interlochen, MI
Date: 2012-04-17
Uploaded by Ursula
Discussion Threads about this plant
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