Cymbidium dayanum Rchb.f 1869 SECTION Himantophyllum Schlechter 1924

Flower Closeup Photos by © Eric Hunt and his Orchid Species Photo Website

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Common Name Day's Cymbidium [English Orchid Grower 1800's]

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

This medium sized, cold to warm growing epiphytic species occuring low down on tree trunks 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, in evergreen lowland forests at elevations of 300 to 1800 meters, with indistinct, strongly compressed-ellipsoid pseudobulbs enveloped by scarious, persistent leaf bases and cataphylls and carrying 5 to 8, 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 alborubens Makino 1902; Cymbidium angustifolium Ames & C.Schweinf. 1920; Cymbidium dayanum subsp. leachianum (Rchb.f.) S.S.Ying 1989; Cymbidium dayanum var. austrojaponicum Tuyama 1941; Cymbidium eburneum var. austrojaponicum (Tuyama) M.Hiroe 1971; Cymbidium eburneum Lindley var dayanum Hkr. f. 1891; Cymbidium leachianum Rchb.f. 1878; Cymbidium poilanei Gagnep. 1931; Cymbidium pulcherrimum Sander 1891; Cymbidium simonsianum King & Pantl. 1895; Cymbidium sutepense Rolfe ex Downie 1925

References W3 Tropicos, Kew Monocot list , IPNI ; AOS Bulletin Vol 28 No 11 1959 photo; The Orchids of Thailand Seidenfaden & Smitinand 1959; The Orchids of Thailand Seidenfaden & Smitinand 1959 as C sutupense drawing; AOS Bulletin Vol 50 No 5 1981 photo; AOS Bulletin Vol 50 No 5 1981 photo as C simonsianum; Orchid Digest Vol 48 No 3 1984 as C angustifolium; Orchidiana Philipiniana Vol 1 Valmayor 1984; A Checklist of the Orchids of Borneo Wood & Cribb 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; Orchids of Bhutan Pearce & Cribb 2002; 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; The Genus Cymbidium Du Puy & Cribb 2007

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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