Cypripedium yatabeanum Makino 1899 SECTION Bifolium

Photo by © Christian Lueg and Ground Orchid Website

Common Name Spotted Lady's Slipper - Yatabe's Cypripedium [Japanese professor of Biology 1800's] - In Japan - Kibana-No-Atsumori-So

Found in the Aleutian Islands and Japan in seepage areas and boggy grasslands as a small to medium sized, cold growing species with 2 oblong, plicate, subopposite on stem leaves that blooms in the early summer an erect, to 12" [30 cm] long, single flowered inflorescence with a foliaceous, ovate-lanceolate floral bract.

This was thought to be a variety of C. guttatum Sw. yet differs in size, color and location so has been given species status.

Synonyms Cypripedium guttatum subsp. yatabeanum (Makino) Hultén 1968; Cypripedium yatabeanum Makino 1899

References W3 Tropicos, Kew Monocot list , IPNI ; AOS Bulletin Vol 29 No 3 1960; The Native Orchids of the United States and Canada Luer 1975 drawing/photos fide; AOS Bulletin Vol 50 No 7 1981 as Cypripedium sp Sachalin Island Photo fide; Orchid Digest Vol 47 No 4 1983 photo fide as C guttatum var yatabeanum; Orchid Digest Vol 62 #1 1998 photo fide; AOS Bulletin Vol 67 No 6 1998 photo fide; Rudolf Schlechter Die Orchideen Band 1C lieferung 40 pg 2492 - 2564 Brieger 2000; Orchid Digest Vol 71 No 3 2007 photo fide; AOS Bulletin Vol 89 #1 2020 drawing/photo fide