Cypripedium acaule Ait.

University of Alberta Vascular Plant Herbarium Read more about this collection »

Leaves2 basal leaves; opposite; elliptic in shape; attach narrower end; slightly hairy (Moss, 1983). 10-20 cm long and 5-8 cm wide (Johnson et al., 1995). FlowersSingle flower on hairless stalk 10-30 cm tall; sepals and petals lance-shaped; additional sepals and petals yellow-green to greenish-brown; 2-5 cm long; pink lip 3-6 cm long; red veins; drooping; cleft in front (Moss, 1983). Flowers pink; lip showy pouch (Johnson et al., 1995). Fruits and SeedsCapsule; ascending; thousands tiny seeds (Johnson et al., 1995).

Scientific Name Cypripedium acaule Ait. Common Name stemless lady's slipper, moccasin flower (Johnson et al., 1995). General Description A perennial that grows 10-30 cm tall from thickened roots with a single, erect and hairy stem; bears pink flowers (Johnson et al., 1995). Leaves 2 basal leaves; opposite; elliptic in shape; attach narrower end; slightly hairy (Moss, 1983). 10-20 cm long and 5-8 cm wide (Johnson et al., 1995). Flowers

Single flower on hairless stalk 10-30 cm tall; sepals and petals lance-shaped; additional sepals and petals yellow-green to greenish-brown; 2-5 cm long; pink lip 3-6 cm long; red veins; drooping; cleft in front (Moss,…

Fruits and Seeds Capsule; ascending; thousands tiny seeds (Johnson et al., 1995). Phenology April to July (JSTOR). Notes

2n=20 (Moss, 1983). The hairs on the stems and leaves bear glands at their tips which may cause a rash if touched by skin (Johnson et al., 1995). Some Native peoples used the roots in a tea to treat headaches or as a…

Range/Distribution Alberta: NE corner of the province (Canadensys). CAN (NT, SK, MB, ON, QC, NL, NB, NS, PE); USA (MN, WI, MI, IL, IN, KY, TN, AL, GA, NC, SC, VA, WV, DE, MD, PA, NJ, NY, VT, NH, ME, MA, CT, RI) (USDA).

Page Citation

"Species Details - Cypripedium acaule Ait., University of Alberta Vascular Plant Herbarium." University of Alberta Museums Search Site, https://search.museums.ualberta.ca/g/1-4470/12-14631. Accessed 05 Mar. 2025.

11 results plotted on map in 10 markers.
Note: Only records with latitude and longitude coordinates are plotted on map.

41370 - Cypripedium acaule Ait.

University of Alberta Vascular Plant Herbarium

Common Namestemless lady's slipper, moccasin flower (Johnson et al., 1995). Place CollectedNorth America: Canada, Alberta, Richardson Lake Date Collected1971-07

36519 - Cypripedium acaule Ait.

University of Alberta Vascular Plant Herbarium

Common Namestemless lady's slipper, moccasin flower (Johnson et al., 1995). Place CollectedNorth America: Canada, New Brunswick, Rayworth Beach Date Collected1960-06-18

36521 - Cypripedium acaule Ait.

University of Alberta Vascular Plant Herbarium

Common Namestemless lady's slipper, moccasin flower (Johnson et al., 1995). Place CollectedNorth America: Canada, New Brunswick, Baie Verte Date Collected1939-06-01

26839 - Cypripedium acaule Ait.

University of Alberta Vascular Plant Herbarium

Common Namestemless lady's slipper, moccasin flower (Johnson et al., 1995). Place CollectedNorth America: Canada, Ontario, Casselman

5262 - Cypripedium acaule Ait.

University of Alberta Vascular Plant Herbarium

Common Namestemless lady's slipper, moccasin flower (Johnson et al., 1995). Place CollectedNorth America: Canada, Ontario, Lake Temagami, Bear Island Date Collected1925-06-07

49472 - Cypripedium acaule Ait.

University of Alberta Vascular Plant Herbarium

Common Namestemless lady's slipper, moccasin flower (Johnson et al., 1995). Place CollectedNorth America: Canada, Ontario, Orient Bay Date Collected1960-07-20

99758 - Cypripedium acaule Ait.

University of Alberta Vascular Plant Herbarium

Common Namestemless lady's slipper, moccasin flower (Johnson et al., 1995). Place CollectedNorth America: Canada, New Brunswick, Greenfield Date Collected1982-06-18

101537 - Cypripedium acaule Ait.

University of Alberta Vascular Plant Herbarium

Common Namestemless lady's slipper, moccasin flower (Johnson et al., 1995). Place CollectedNorth America: Canada, Ontario, Gravenhurst Date Collected1897-06-18

36343 - Cypripedium acaule Ait.

University of Alberta Vascular Plant Herbarium

Common Namestemless lady's slipper, moccasin flower (Johnson et al., 1995). Place CollectedNorth America: United States, Vermont, Chittenden County, Burlington Date Collected1942-05-30

101538 - Cypripedium acaule Ait.

University of Alberta Vascular Plant Herbarium

Common Namestemless lady's slipper, moccasin flower (Johnson et al., 1995). Place CollectedNorth America: United States, North Carolina, Buncombe County, Biltmore Date Collected1896-05-02

52566 - Cypripedium acaule Ait.

University of Alberta Vascular Plant Herbarium

Common Namestemless lady's slipper, moccasin flower (Johnson et al., 1995). Place CollectedNorth America: United States, Wisconsin, Shishebogama Lake

124585 - Cypripedium acaule Ait.

University of Alberta Vascular Plant Herbarium

Common Namestemless lady's slipper, moccasin flower (Johnson et al., 1995). Place CollectedNorth America: Canada, Alberta, Lake Athabasca, Fidler-Greywillow Wildland Park, Bustard Island Date Collected1984-07-05

124586 - Cypripedium acaule Ait.

University of Alberta Vascular Plant Herbarium

124587 - Cypripedium acaule Ait.

University of Alberta Vascular Plant Herbarium

Common Namestemless lady's slipper, moccasin flower (Johnson et al., 1995). Place CollectedNorth America: Canada, Alberta, Audet Lake Date Collected2002-06-22

136560 - Cypripedium acaule Ait.

University of Alberta Vascular Plant Herbarium

Common Namestemless lady's slipper, moccasin flower (Johnson et al., 1995). Place CollectedNorth America: Canada, New Brunswick, Baie Verte Date Collected1939-06-01

141131 - Cypripedium acaule Ait.

University of Alberta Vascular Plant Herbarium

Common Namestemless lady's slipper, moccasin flower (Johnson et al., 1995). Place CollectedNorth America: Canada, Alberta, Richardson River Date Collected2014-08-15

Species Details