Orchids of Manitoba 1

# Common Name Scientific Name Rank
1. Small Round-leaf Orchid Amerorchis rotundifolia (Banks) Hulten,
[Orchis rotundifolia Banks]
n/a
2. Dragon's Mouth * Arethusa bulbosa L. S2
3. Grass Pink; Swamp-Pink * Calopogon tuberosus (L.) BSP var. tuberosus
[Calopogon pulchellus (Salisb.) R.Br.]
S2
4. Fairy Slipper; Venus' Slipper; Calypso Calypso bulbosa (L.) Oakes var. americana (R. Brown) Luer. n/a
5. Long-Bracted Orchid Coeloglossum viride Hartman,
[Habenaria viridis (L.) R. Br.]
SU
6. Spotted Coralroot Corallorhiza maculata Raf. n/a
7. Striped Coralroot Corallorhiza striata Lindl. S2
8. Northern or Early Coralroot Corallorhiza trifida Chat. n/a
9. Pink or Stemless Lady's Slipper;
Moccasin Flower
Cypripedium acaule Ait. n/a
10. Hybrid: Small White × Yellow Lady's-Slipper * Cypripedium ×andrewsii Fuller nm. andrewsii,
[C. calceolus var. parviflorum × C. candidum]
n/a
11. Hybrid: Small White × Yellow Lady's-Slipper * Cypripedium ×andrewsii Fuller nm. favillianum (Curtis) Boivin,
[C. calceolus var. pubescens × C. candidum]
n/a
12. Ram's-Head Lady's-Slipper * Cypripedium arietinum R. Br. S2?
15. Small Yellow Lady's-Slipper (variety) Cypripedium calceolus L. var. parviflorum (Salisb.) Fern. n/a
14. Flat-Petaled Yellow Lady's-Slipper (variety) Cypripedium calceolus L. var. planipetalum Vict. & Rousseau SU
13. Large Yellow Lady's-Slipper (variety) Cypripedium calceolus L. var. pubescens (Willd.) Correll n/a
16. Small White Lady's-Slipper * Cypripedium candidum Mahl. S1
17. Franklin's, Sparrow-Egg or Northern White Lady's-Slipper Cypripedium passerinum Richards n/a
18. Showy Lady's-Slipper Cypripedium reginae Walt. S3?
19. Lesser Rattlesnake Plantain Goodyera repens (L.) R. Br. var. ophiodes Fern. n/a
20. Tesselated Rattlesnake Plantain * Goodyera tesselata Lodd. S2
21. Loesel's Twayblade Liparis loeselii (L.) Richard S3
22. Auricled Twayblade * Listera auriculata Wieg. S1
23. Northern Twayblade * Listera borealis Morong. S2
24. Heart-Leaved Twayblade Listera cordata (L.) R. Br. n/a
25. White Adder's-Mouth Malaxis monophylla (L.) var. brachypoda (Gray) Morris & Eames S2?
26. Bog Adder's-Mouth Malaxis paludosa (L.) Sw. S1
27. Green Adder's-Mouth * Malaxis unifolia Michx. S2?
28. Tall Leafy White Orchid Platanthera dilatata (Pursh.) Lindl. ex Beck,
[Habenaria dilatata (Pursh.) Hook.]
n/a
29. Hooker's Orchid * Platanthera hookeri (Torr.) Lindl.,
[Habenaria hookeri Torr.]
S2
30. Tall Leafy Green Orchid Platanthera hyperborea (L.) Lindl.,
[Habenaria hyperborea (L.) R.Br.]
n/a
31. Ragged Fringed Orchid * Platanthera lacera (Michx.) G. Don,
[Habenaria lacera (Michx.) Ladd.]
S2
33. Blunt-Leaf Orchid Platanthera obtusata (Pursh.) Lindl.,
[Habenaria obtusata (Pursh.) Richards]
n/a
34. Large Round-Leaved Orchid Platanthera orbiculata (Torr.) Lindl.,
[Habenaria orbiculata (Pursh.) Torr.]
S3
32. Western Prairie Fringed Orchid * Platanthera praeclara Sheviak & Bowles, Lindley,
[Habenaria leucophaea (Nutt.) A. Gray]
S1
35. Small Purple Fringed Orchid * Platanthera psycodes (L.) Lindley,
[Habenaria psycodes (L.) Spren.]
S1
36. Rose Pogonia * Pogonia ophioglossoides (L.) Ker S1
37. Slender Ladies'-Tresses Spiranthes lacera (Raf.) Raf.,
[S. gracilis (Bigel) Beck]
n/a
38. Great Plains Ladies'-Tresses * Spiranthes magnicamporum Sheviak S1?
39. Hooded Ladies'-Tresses Spiranthes romanzoffiana Cham. n/a

* very rare and/or endangered

1 Used with permission:
Dr. Karen Johnson, Curator of Botany
Manitoba Museum of Man and Nature
Winnipeg, Manitoba, Canada

Note: the first three columns are from Dr. Johnson's report; the Rank column is from other sources:

  • Manitoba Conservation Data Centre: Species Database: Reports: Monocot Species of Concern
  • Rare Plants of Manitoba   Manitoba Wildlife Branch   2000-11-27

    Rank ranges from S1 (Most rare) to S5 (Least rare);  and is for the province of Manitoba.
    For more information on these designations, see:  Manitoba Conservation Data Centre: Species Database: Status Ranking

    Note: the Manitoba-CDC database also shows Nodding Ladies'-Tresses (Spiranthes cernua) in the province, with a Rank of SR.