Cypripedium japonicum Thunb. 1784 SECTION Flabellinervia

Photo by Dr. Clark Riley and his Cypripedium Page

Flower in situ in Japan

Plants in situ in Japan

Photos by Natsui and his Japanese Native Plant Page

Full shade Cold Spring

Common Name The Japan Cypripedium - In Japan - Kumagae-So - In China Shan Mai Shao Lan

Flower Size 3.6" to 4" [9 to 10 cm]

Found in Japan, Taiwan and China in humus rich soils in forests and on shady slopes along ravines in bamboo at elevations of 1000 to 2000 meters as a small to medium sized, cold growing terrestrial with an erect 4 to 6" [10 to 15 cm] long, brown tomentose stem provided with several sheaths in the lower part and carrying 2, opposite, near the middle of the stem, orbicular, plicate, serrulate margined leaves that blooms in the spring on an erect, terminal, densely villose, 3" [7.5 cm] long, single flowered inflorescence with a leafy, rhombic-ovate to ovate-lanceolate, glabrous, minutely ciliate, longer than the ovary floral bract

Synonyms Cypripedium cathayenum S.S.Chien 1930; Cypripedium japonicum var. glabrum M.Suzuki 1980

References W3 Tropicos, Kew Monocot list , IPNI ; Icones plantarum formosanarum nec non et contributiones ad floram formosana Hayata 1912; Die Orchideen Schlechter 1915; Atlas des Orchidees Cultivees Constantin 1920 drawing fide; AOS Bulletin Vol 29 No 3 1960 photo fide; Encyclopedia of Cultivated Orchids Hawkes 1965; Die Orchideen #4 13-16 tafel 5 Rudolph Schlechter 1971 photo ok; AOS Bulletin Vol 44 #9 1975 photo fide; Orchid Digest Vol 48 No 1 1984 photo fide; Native Orchids of China in Colour Singchi, Zhanhuo and Yibo 1999 photo fide; Rudolf Schlechter Die Orchideen Band 1C lieferung 40 pg 2492 - 2564 Brieger 2000; Native Orchids of Shaanxi Shaanxi Science & Technology Press 2007 photo fide; AOS Bulletin Vol 77 #7 2008 photo fide; A Field Guide to the Orchids of China Singchi, Zhongjian, Yibo, Xiaohua and Zhanhuo 2009 photo fide; Flora of China Vol 25 Zhengyi, Raven & Deyuan 2009; Flora of China Vol 25 Illustrations Zhengyi, Raven & Deyuan 2010 drawing fide; AOS Bulletin Vol 80 #4 2011 photo fide; Atlas of Native Orchids of China Vol 1 Jin Xiaohua, Li Jianwu and Ye Deping 2019 photo fide