Cypripedium reginae Walter 1788 SECTION Cypripedium SUBSECTION Obtusipetala Photo by Jim Fowler and his P-Base Orchid North American Orchid Website

Back side Of Flowers Photo courtesy of Joseph Dougherty.

to EARLY

Common Name Showy Lady's Slipper or Queen Lady's Slipper

Flower Size to 4" [to 10 cm]

This medium sized, cold growing terrestrial is from northeastern and north central North America and is found on the margins of wet bogs and has a stem carrying 7, ovate-lanceolate, suberect to spreading, plicate, subacute leaves with undulate margins that blooms in the spring through early fall on a slender, terminal inflorescence that has from 1 to rarely 4, color variable flowers subtended by a leafy bract.

Synonyms Calceolus hirsutus Nieuwl. 1913; Calceolus reginae Nieuwl. 1913; Cypripedium album Ait. 1789; Cypripedium canadense Michx. 1803; Cypripedium hirsutum [Farwell] Miller 1768; Cypripedium hirsutum f. album R.Hoffm. 1922; Cypripedium humile Salisb. 1791; Cypripedium reginae f. albolabium Fernald & B.G.Schub. 1948; Cypripedium reginae f. album (Aiton) House 1923; Cypripedium reginae var. album (Aiton) Rolfe 1911; Cypripedium spectabile Sw. 1791; Fissipes hirsuta Farwell 1917

References W3 Tropicos, Kew Monocot list , IPNI ; Die Orchideen Schlechter 1915 photo fide; Atlas des Orchidees Cultivees Constantin 1920 drawing fide; AOS Bulletin Vol 26 No 7 1957 painting; AOS Bulletin Vol 27 No 10 1958 photo; AOS Bulletn Vol 31 No 6 1962 photo; AOS Bulletin Vol 6 1963 photo; AOS Bulletin Vol 33 No 5 1964 photo; Encyclopedia of Cultivated Orchids Hawkes 1965; AOS Bulletin Vol 39 No 4 1970 photo; Die Orchideen #4 13-16 tafel 5 Rudolph Schlechter 1971 photo ok; AOS Bulletin Vol 49 NO 3 1980; Orchid Digest Vol 44 No 6 1980 photo fide; AOS Bulletin Vol 50 No 6 1981 photo; Orchid Digest Vol 46 No 6 1982 drawing/photo fide; AOS Bulletin Vol 55 No 1 1986 photo; AOS Bulletin Vol 56 No 1 1987 photo; AOS Bulletin Vol 56 No 9 1987; Schlechteriana Vol 4 No 1/2 1993 photo; Schlechteriana Vol 4 No 4 1993 photo; AOS Bulletin Vol 63 No 4 1994 photo; AOS Bulletin Vol 64 No 4 1995 Photo; AOS Bulletin Vol 66 No 2 1997 photo; AOS Bulletin Vol 66 No 6 1997 photo; AOS Bulletin Vol 68 No 4 1999 photo; AOS Bulletin Vol 69 No 9 2000 photo; Rudolf Schlechter Die Orchideen Lieferung 40 2000; AOS Bulletin Vol 72 No 3 2003 photo; AOS Bulletin Vol 73 No 4 2004 photo; AOS Bulletin Vol 73 No 5 2004 photo; AOS Bulletin Vol 73 No 8 2004 photo; AOS Bulletin Vol 74 No 10 2005 photo; AOS Bulletin Vol 75 No 10 2006 photo; Orchid Digest Vol 71 No 1 2007 photo; AOS Bulletin Vol 78 No 5 2009 photo;

Cypripedium reginae f. albolabium Fernald & B.G.Schub. 1948

A white color form of the previous species

References W3 Tropicos, Kew Monocot list , IPNI ; AOS Bulletin Vol 72 No 2 2003 photo; Wild Orchids of the Prairies and Great Plains of North America P M Brown 2006

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