Cymbidium dayanum Rchb.f 1869 SECTION Himantophyllum Schlechter 1924

Flower

Photos by Eric Hunt

FragranceFull sunCoolTo Hot SummerFall

Common Name Day's Cymbidium [English Orchid Grower 1800's] - In Japan Hetsuka-ran - In China Dong Feng Lan

Flower Size 1.6 to 2" [4 to 5 cm]

This medium sized, hot to cool growing epiphytic or terrestrial species occurs low down on tree trunks in evergreen lowland forests at elevations of 200 to 1800 meters and can be found in Assam India, eastern Himalayas, Sikkim, Thailand, Cambodia, China, Vietnam , Borneo, Malaysia, the Philippines, Sulawesi, Sumatra, Taiwan, Ryukyu Islands and Japan, with indistinct, strongly compressed-ellipsoid pseudobulbs enveloped by scarious, persistent leaf bases and cataphylls and carrying 5 to 12, disitichous, narrow-linear, dark green, slightly leathery, pale green, acute to acuminate, sessile [no petiole] leaves with the articulation 1.2 to 2.4" away from the base that blooms in the summer and fall on a basal, erect to pendant, several [5 to 15] flowered, 9" [22.5 cm] long, racemose scape subtended with pink veined sheaths and triangular, acute, purplish floral bracts and carrying mostly non-fragrant flowers, and needs even year round conditions.

Synonyms Cymbidium acutum Ridl. 1896; Cymbidium aestivum Z.J.Liu & S.C.Chen 2004; Cymbidium alborubens Makino 1902; Cymbidium angustifolium Ames & C.Schweinf. 1920; Cymbidium dayanum subsp. leachianum (Rchb.f.) S.S.Ying 1989; Cymbidium dayanum var. albiflorum S.S.Ying 1995; Cymbidium dayanum var. austrojaponicum Tuyama 1941; Cymbidium eburneum var. austrojaponicum (Tuyama) M.Hiroe 1971; Cymbidium eburneum Lindley var dayanum Hkr. f. 1891; Cymbidium eburneum var dayi Jennings 1875; Cymbidium leachianum Rchb.f. 1878; Cymbidium poilanei Gagnep. 1931; Cymbidium pulcherrimum Sander 1891; Cymbidium simonsianum King & Pantl. 1895; Cymbidium simonsianum f. vernale Makino 1912 Cymbidium sutepense Rolfe ex Downie 1925

References W3 Tropicos, Kew Monocot list , IPNI ; The Orchids of Sikkim-Himalaya Part 1 King & Pantling 1898 as C simonsianum drawing fide; Die Orchideen Schlechter 1915 as C acutum; Flora of Malaya Vol 1 Holttum 1957; AOS Bulletin Vol 28 No 11 1959 photo ok; The Orchids of Thailand Seidenfaden & Smitinand 1961; The Orchids of Thailand Seidenfaden & Smitinand 1959 as C sutupense drawing good; The Orchids of Thailand Seidenfaden & Smitinand 1965 corrections; The Orchids of Thailand Seidenfaden & Smitinand 1965 corrections as C sutepense; Encyclopedia of Cultivated Orchids Hawkes 1965; Orchids of Southern Ryukyu Islands Garay & Sweet 1974; Indian Orchids Guide to Identification and Culture Vol 2 Pradhan 1979 as C simonsianum drawing fide; AOS Bulletin Vol 50 No 5 1981 photo fide; AOS Bulletin Vol 50 No 5 1981 as C simonsianum photo fide; The Complete Writings on Philippine Orchids Vol 1 Quisumbing 1981 drawing/photo fide; The Manual of Cultivated Orchids Bechtel, Cribb, Launert 1992 drawing fide; Opera Botanica #72 Orchid Genera in Thailand XI Cymbidiaeae Seidenfaden 1983 drawing fide; Orchid Digest Vol 48 No 3 1984 as C acutum photo fide; Orchid Digest Vol 48 No 3 1984 photo fide; Orchid Digest Vol 48 No 3 1984 as C angustifolium; Orchidiana Philipiniana Vol 1 Valmayor 1984; Rudolf Schlechter Die Orchideen Band 1B lieferung 25 1520 - 1584 Brieger 1991 photo fide; The Orchids of Penninsular Malaysia and Singapore Seidenfaden & Wood 1992 drawing fide; The Manual of Cultivated Orchids Bechtel, Cribb, Launert 1992 drawing fide; Thai Orchid Species Rakpaibulsombat 1992 photo fide; The Plants of Mount Kinabalu Vol 2 Orchids Wood Beaman & Beaman 1993 photo fide; A Checklist of the Orchids of Borneo Wood & Cribb 1994; Identification of the Orchids [Orchidaceae Juss.] Vietnam Averyanov 1994; Orchids Australia Vol 10 No 5 1998 photo as C simmonsissimum; Native Orchids of China in Colour Singchi, Zhanhuo and Yibo 1999 photo fide; Orchids of Sumatra Comber 2001 photo ok; Orchids of Sarawak Beeman & Wood 2001 photo fide; The Orchids of the Philippines Cootes 2001 photo fide; Orchids of Bhutan Pearce & Cribb 2002 photo fide; Lindleyana Vol 17 No 1 2002; Flora Malesiana Orchids of the Philippines Vol I Agoo, Shuiteman and de Vogel 2003; AOS Bulletin Vol 73 No 10 2004 photo; AOS Bulletin Vol 74 No 12 2005 photo fide; A field Guide to the Wild Orchids of Thailand Vaddhanaphuti 2005 photo fide; The Genus Cymbidium Du Puy & Cribb 2007 photo/drawing fide; Orchids of India A Glimpse Misra 2007; Wild Orchids of the Cameron Highlands REACH 2009 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 Zhengyi, Raven & Deyuan 2009 as C aestivum; Flora of China Vol 25 Illustrations Zhengyi, Raven & Deyuan 2010 drawing fide; Flora of China Vol 25 Illustrations Zhengyi, Raven & Deyuan 2010 as C aestivum drawing fide; The Atlas of Wild Orchids in Hainan Island, China Shenyan and Junmei 2010 photo fide; Orchid Digest Vol 76 #3 2012 photo fide; AOS Bulletin Vol 81 #2 2012 photo fide; The Orchids of Mount Kinabalu Vol 2 Wood, Beaman, Lamb, Chu Lun and Beaman 2011 photo fide; Wild Orchids of Penninsular Malaysia Ong, O'Byrne, Yong & Saw 2011 photo fide; A to Z of South East Asian Orchid Species Vol 2 O'Byrne 2011 photo fide; AOS Bulletin Supplement Cymbidiums Vol 87 #10 2018 photo fide; Orchid Digest Vol 83 #1 2019 photo fide; Atlas of Native Orchids of China Vol 2 Jin Xiaohua, Li Jianwu and Ye Deping 2019 photo fide;

Cymbidium dayanum var. albiflorum S.S. Ying 1995

Photo courtesy of Oak Hill Gardens

A white color variety of the previous species.

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