Cypripedium calceolus

Family Orchidaceae
Subfamily Cypripedioideae (also placed in Cypripediaceae)
Tribe Cypripedieae
Subtribe Cypripediinae
Scientific name Cypripedium calceolus L.
Synonyms Calceolus alternifolius Saint-Lager; Calceolus marianus Crantz; Cypripedilon marianus (Crantz) Rouy; Cypripedium alternifolium Saint-Lager; Cypripedium atsmori C. Morren; Cypripedium boreale Salisbury; Cypripedium calceolus L. forma biflorum Rouy; Cypripedium calceolus L. forma triflorum Rouy; Cypripedium calceolus L. var. citrina B. Hergt; Cypripedium calceolus L. var. viridiflora M. Schulze; Cypripedium cruciatum Dulac; Cypripedium ferrugineum Gray; Cypripedium microsaccos Kränzlin
Common name (Japanese common name) karafuto-atsumori-sou (カラフトアツモリソウ, 樺太敦盛草 [meaning: Sakhalin atsumori-sou (atumori-sou = Cypripedium macranthos)])
(Chinese common name) shao lan (杓兰)
(English common name) Lady's-slipper
Distribution (Japan) Hokkaido
(Other nations) Russia, Korea, China, Europe, Canada, USA
Chromosomal number 2n=20
Description Plants 20-45cm tall. Leaves ca. 7-15cm long. Flowers yellow, ca. 3-4cm long, flowering in June to July. Terrestrial. Perennial plants.
Reference Cypripedium calceolus L.
Cypripedium calceolus Linnaeus
Cypripedium calceolus L.
Cypripedium calceolus L. 1753
Identity of Cypripedium calceolus (Orchidaceae) in Rebun Island: Comparative DNA analysis of related species
Flower visitors and pollinators of the lady's slipper orchid Cypripedium calceolus in an area protected for C. macranthos var. rebunense
Genetic Analyses of Genus Cypripedium Found in Northern Japanese Islands and Related Species Endemic to Northeast China
Note Rare species.
Photos below are those of an orchid which is a clone of a cultivated plant (Chinese type).

April 2010
at my home
April 2010
at my home
April 2010
at my home

April 2010
at my home