Cypripedium calceolus L. var. parviflorum (Salisb.) Fernald 1946

SECTION Cypripedium SUBSECTION Cypripedium

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Flower and Plant in situ Photos courtesy of Joseph Dougherty

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Common Name Yellow Lady's Slipper - Shoe-Carrying Cypripedium

Flower Size Up to 6 1/2" [up to 16.25]

Found in NE America and adjacent Canadian areas, as a large sized, cold to cool growing terrestrial orchid from swamps and bogs from sea level to 2500 meters with short stems carrying 3 to 5, plicate, petiolate, elliptic to ovate or ovate-lanceolate, acute leaves which blooms in the mid-spring through mid-summer on a slender stalked, erect, terminal inflorescence with a solitary [rarely 2] flower and a leaf-like bract arising from the center of the semi-mature leaves that is said to be synomonous with C. parviflorum.

Synonyms Calceolus alternifolius St. Lager 1880; Calceolus alternifolius St.-Lég. 1889; Calceolus marianus Crantz 1769; Calceolus parviflorus (Salisb.) Nieuwl. 1913; Criosanthes parviflora Raf. 1836; Cypripedium alternifolium St.-Lag. 1880; Cypripedium assurgens Raf. 1833; Cypripedium bifidum Raf. 1833; Cypripedium boreale Salisb. 1796; Cypripedium cruciatum Dulac 1868; Cypripedium ferrugineum Gray 1821; Cypripedium luteum Aiton ex Raf. 1828; Cypripedium luteum var. parviflorum (Salisb.) Raf. 1828; Cypripedium makasin Farw. 1918; *Cypripedium parviflorum Salisb. 1791; Cypripedium parviflorum f. albolabium Magrath & J.L.Norman 1989; Cypripedium parviflorum var. makasin (Farw.) Sheviak 1993; Cypripedium parviflorum var. parviflorum; Cypripedium parvulum Fedde 1915; Cypripedium pubescens var. makasin Farw. 1918

References W3 Tropicos, Kew Monocot list , IPNI ; AOS Bulletin Vol 32 No 6 1963 as C parviflorum; Die Orchideen #3 9-12 tafel 4 Rudolph Schlechter 1971 drawing ok; AOS Bulletin Vol 50 No 6 1981 photo; Orchid Digest Vol 46 No 6 1982 photo fide as C parviflorum; AOS Bulletin Vol 61 No 6/548-9 1992 photo; Schlechteriana Vol 4 No 4 1993 as C parviflorum; AOS Bulletin Vol 63 No 4 1994 photo; AOS Bulletin Vol 64 No 6 1995 photo as C parviflorum; AOS Bulletin Vol 69 No 9 2000 as C parviflorum; AOS Bulletin Vol 71 No 11 2002 drawing; AOS Bulletin Vol 73 No 5 2004 photo; AOS Bulletin Vol 73 No 8 2004 photo; Orchid Digest Vol 71 No 1 2007 photo; Orchid Digest Vol 71 No 3 2007 photo;

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