Cypripedium passerinum Richardson 1823 SECTION Cypripedium SUBSECTION Obtusipetala Photo courtesy of David Mcadoo

Full shadeCold LATESpring To Summer

Common Name The Sparrow's Egg Lady's Slipper

Flower Size 1.2" [3 cm]

A medium sized, cold growing terrestrial species from the province of Alberta and the state of Montana in moist and dry coniferous forests, wooded ravines, and littorals of streams and lakeshores with ovate-lanceolate, plicate, glandular-pubescent leaves that sheath the stem and blooms with solitary flowers on an erect, slender, inflorescence that appears in the late spring and summer.

SynonymsCypripedium passerinum f. minganense (Vict.) P.M.Br. 200; Cypripedium passerinum var. minganense Vict. 1929

References W3 Tropicos, Kew Monocot list , IPNI ; Orchid Digest Vol 47 No 1 1983 photo fide; Orchid Digest Vol 47 No 4 1983 photo; fide AOS Bulletin Vol 65 Vol 6 1996; Rudolf Schlechter Die Orchideen Band 1C lieferung 40 pg 2492 - 2564 Brieger 2000 ; Orchid Digest Vol 71 No 3 2007 photo;