Blooms: May-June
Habit: herb
Duration: perennial
Origin: Native
Conservation Status: Endangered
Distribution: Occurring east of the Cascades crest in Washington; Alaska south to California, east to the Rocky Mountains; throughout most of Canada and the central, southeastern, and northeastern regions of the U.S.
Habitat: Bogs and damp woods.
Habit: herb
Duration: perennial
Origin: Native
Conservation Status: Endangered
Distribution: Occurring east of the Cascades crest in Washington; Alaska south to California, east to the Rocky Mountains; throughout most of Canada and the central, southeastern, and northeastern regions of the U.S.
Habitat: Bogs and damp woods.
Species Description:
General: Sparsely pubescent, perennial herbs, the stems 1.5-4 dm. tall, glandular, leafy throughout.
Leaves: Leaves alternate, broadly elliptic to elliptic-lanceolate, 6-17 cm. long and up to 7 cm. wide, sessile and slightly sheathing.
Flowers: Flower solitary, terminal, subtended and usually exceeded by an erect, leaf-like bract; sepals and petals greenish-yellow to purplish-brown, wavy-margined, the upper sepal the largest, 2.5-4 cm. long, the lower pair completely fused; 2 small petals narrower and longer than the sepals; the third petal (lip) pouch-like, 2-3 cm. long, yellow, often purplish-dotted around the orifice; fertile stamens 2, the third sterile stamen petal-like, up to 10 mm. long, triangular, lobed at the base.
Fruits: Capsule.
General: Sparsely pubescent, perennial herbs, the stems 1.5-4 dm. tall, glandular, leafy throughout.
Leaves: Leaves alternate, broadly elliptic to elliptic-lanceolate, 6-17 cm. long and up to 7 cm. wide, sessile and slightly sheathing.
Flowers: Flower solitary, terminal, subtended and usually exceeded by an erect, leaf-like bract; sepals and petals greenish-yellow to purplish-brown, wavy-margined, the upper sepal the largest, 2.5-4 cm. long, the lower pair completely fused; 2 small petals narrower and longer than the sepals; the third petal (lip) pouch-like, 2-3 cm. long, yellow, often purplish-dotted around the orifice; fertile stamens 2, the third sterile stamen petal-like, up to 10 mm. long, triangular, lobed at the base.
Fruits: Capsule.
Accepted Name:
Cypripedium parviflorum Salisb.Synonyms:
Cypripedium calceolus L.
Cypripedium calceolus L. var. parviflorum (Salisb.) Fernald
Cypripedium parviflorum Salisb. var. makasin (Farw.) Sheviak
Cypripedium parviflorum Salisb. var. parviflorum
Cypripedium parviflorum Salisb. var. pubescens (Willd.) Knight
Treated in Flora of the PNW as:
Cypripedium calceolus var. parviflorum
Additional Resources:
PNW Herbaria Specimens: View list of Cypripedium parviflorum specimens in the Consortium of Pacific Northwest Herbaria database.
WTU Herbarium Specimens: View list of Cypripedium parviflorum specimens in the WTU Herbarium database.
Washington Flora Checklist: Cypripedium parviflorum treatment.
E-Flora BC: Cypripedium parviflorum atlas page.
CalPhotos: Cypripedium parviflorum images.
USDA Plants Database: Cypripedium parviflorum.
Jim Riley
Dana Visalli
Dana Visalli
Dana Visalli
Dana Visalli
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 WA Native Plant Society |
