Cypripedium parviflorum
Salisbury var. makasin (Farwell) Sheviak
[Cypripedium calceolus Linnaeus var. parviflorum (Salisbury) Fernald]
[Cypripedium calceolus Linnaeus var. pubescens (Willdenow) Correll]
Northern Small-flowered Yellow Lady's-slipper
Location Nova Scotia, New Brunswick, Quebec, Ontario, Manitoba, Saskatchewan, Alberta, British Columbia.
Specific Habitat

From Southern Canada in the East, through the Great Lakes to the Prairies and the Rocky Mountains. A plant of the calcareous fens, it also occurs in other wet sites, especially with organic-rich or sandy soils.

Flowering Season

May in the South through July in the North and West.


The outer surface of the sheathing bract is sparsely and inconspicuously pubescent to glabrous when young.
Flowers: small, with a lip of 15-29mm. Long sepals and petals, usually suffused with dark reddish-brown, or, in the West, often spotted and blotched. Scent intense and sweet.


Keys to separating this variety from the other yellow-flowered lady’s-slippers are the scent, the sparse pubescence, small flowers and colouration of the sepals and petals. It also has a much wider distribution than C. parviflorum var. parviflorum Hybridization between all of these varieties can make it very difficult to separate one from the other. After viewing many different populations, separations of the types of varieties can be made.


1993 AOS Bulletin 62 (4): 403
1994 AOS Bulletin 63 (6): 664-669
1995 AOS Bulletin 64 (6): 606-612
The Genus Cypripedium

Habitat Plant Flower

© Royal Botanical Gardens, Dr. Donald Gunn Image Collection.