Cypripedium x ventricosum Sw. 1800
Photos by Jan H. Larsen KJ Orchids Denmark
Common Name The Inflated Cypripedium
Flower Size 1.4" [6 cm]
A natural hybrid between C calceolus and C macranthos occuring in Russia, Mongolia, northeastern China and North & South Korea in open broad-leafed and mixed forests, shrubby thickets and forest meadows as a small to medium sized, cold growing terrestrial orchid with an erect, more or less pubescent stem carrying 3 to 5, broadly elliptic to ovate-elliptic, sometimes sparsely puberulous on the veins leaves that blooms in the spring on a usually 2 flowered inflorescence with leaf-like bracts.
Synonyms Cypripedium × agnicapitatum Y.N.Lee 2002; Cypripedium × barbeyi E.G.Camus, Bergon & A.Camus 1908; Cypripedium × freynii Karo 1896; Cypripedium × kesselringii G.Keller 1930; Cypripedium × krylowii Siuzew 1926; Cypripedium macranthos subsp. ventricosum (Sw.) Printz 1921; Cypripedium macranthos var. ventricosum (Sw.) Hook.f. 1890; Cypripedium × manchuricum Stapf 1927; Cypripedium × manchuricum var. virescens Stapf 1927; Cypripedium × morinanthum Y.N.Lee 2002; Cypripedium × roseum Y.N.Lee 2002; Cypripedium × sinapoides Y.N.Lee 2002; Cypripedium × ventricosum f. bicolor Aver. 1999; Cypripedium × ventricosum nothovar. virescens (Stapf) J.M.H.Shaw 2003
References W3 Tropicos, Kew Monocot list , IPNI ; Die Orchideen 3 Auflage Bd 1 Sonderabdruck aus Schlechter Lieferung 4 193 to 256 Brieger, Maatsch and Senghas 1971 as C manchurium photo ok; AOS Bulletin Vol 50 No 7 1981 Photo fide; Native Orchids of China in Colour Singchi, Zhanhuo and Yibo 1999 photo fide; Lindleyana Vol 15 No 4 2000; Orchid Digest Vol 65 #3 2001 photo fide; AOS Bulletin Vol 71 No 12 2002 Photo fide; AOS Bulletin Vol 76 #11 2007 photo fide; Orchid Digest Vol 74 #3 2010 photo fide; AOS Bulletin Vol 85 #6 2016 photo fide; AOS Bulletin Vol 88 #11 2019 as C x ventricosum notovar virescens photo fide;
Cypripedium ventricosum Sw. 1800 var alba
Photo by Carl & Linda Austin
to 
to EARLY
References W3 Tropicos, Kew Monocot list , IPNI ; AOS Bulletin Vol 50 No 7 1981 Photo fide; Orchid Digest Vol 65 #3 2001 Photo fide;
Cypripedium × ventricosum f. bicolor Aver. 1999
Photo by Leonid Averyanov
References W3 Tropicos, Kew Monocot list , IPNI ; Orchid Digest Vol 65 #3 2001 Photo fide;
--------------------------------------------------------------------------------------------------------------------------
