Cypripedium reginae Walter
Showy Lady's Slipper
Orchidaceae (Orchid Family)
USDA Symbol: CYRE6
A stout, hairy, often twisted, leafy stalk bearing 1-3 large flowers with a white and pink, pouch-like lip petal.
This plant, the tallest and most beautiful of our northern native orchids, is especially common in the Great Lakes region. It has been overpicked and should be protected from further exploitation. Small White Lady's Slipper (C. candidum), a smaller plant, has a little flower with a white lip petal; it occurs in limestone soil and boggy places from Saskatchewan east to Ontario and New York, south to Virginia and Alabama, west to Missouri, and north to Nebraska and the Dakotas.
From the Image Gallery
Plant CharacteristicsDuration: Perennial
Leaf Complexity: Simple
Fruit Type: Capsule
Size Notes: Up to about 3 feet tall.
Bloom InformationBloom Color: White , Pink , Purple
Bloom Time: May , Jun , Jul , Aug
DistributionUSA: AL , AR , CT , GA , IA , IL , IN , KY , MA , MD , ME , MI , MN , MO , NC , ND , NH , NJ , NY , OH , PA , TN , VA , VT , WI , WV
Canada: NB , NL , NS , ON , PE , SK
Native Distribution: Saskatchewan east to Newfoundland, south to North Carolina, west to Arkansas, and north to Minnesota and North Dakota.
Native Habitat: Swamps and moist woods, especially limestone sites.
Growing ConditionsSoil Moisture: Moist
BenefitWarning: The glandular hairs of the foliage may cause a rash similar to that caused by Poison Ivy (Toxicodendron radicans). POISONOUS PARTS: Glandular, irritating hairs on leaves. Symptoms include skin irritation after contact. Toxic Principle: Unidentified.
Conspicuous Flowers: yes
National Wetland Indicator Status
From the National Organizations DirectoryAccording to the species list provided by Affiliate Organizations, this plant is on display at the following locations:
Mt. Cuba Center - Hockessin, DE
Web ReferenceWebref 38 - Flora of North America (2019) Missouri Botanical Garden, St. Louis, MO & Harvard University Herbaria, Cambridge, MA.
Webref 23 - Southwest Environmental Information Network (2009) SEINet - Arizona Chapter
Additional resourcesUSDA: Find Cypripedium reginae in USDA Plants
FNA: Find Cypripedium reginae in the Flora of North America (if available)
Google: Search Google for Cypripedium reginae
MetadataRecord Modified: 2023-04-24
Research By: TWC Staff