Dendrobium delacourii Guillaumin 1924 SECTION Stachyobium

Photo by Pieter C. Brouwer and his Nature Photo Website

Another Flower More Fimbriate Lip

Photo by Jay Pfahl

Flower Closeup

Photo by Dale and Deni Borders

Another Flower Form

Photo by David Morris

to to

Common Name Delacour's Dendrobium [American Ornithologist 1900's] - In Thailand Ueang Dok Ma Kham

Flower Size 1/2" [1.5 to 2 cm]

Found in Myanmar, Thailand, Laos and Vietnam in deciduous forests often in full sun, at elevations of 800 to 1300 meters as a mini-miniature sized, warm to cool growing epiphyte from with clustered, spindle-shaped, 5 to 6 noded, yellowish stems that are leafy the entire length carrying stout, papery, narrowly oblong, acute or unequally bilobed apically, pale green leaves that blooms from the summer till fall on an erect raceme with up to 10 flowers arising from the apex of newly developing pseudobulbs and can carry up to 5, not pleasingly fragrant flowers on the same growth.

They need less water and fertilizer in the early winter, with a gradual tapering off even further for the last month, allowing the roots to dry completly.

There are 3 very similar species if only the flowers are looked at, D delacourii, D simondii and D venustum. They are easily separated when the plants are taken into account. D delacourtii is 4" [10 cm] and under and has a terminal inflorescence carrying flowers with a wide open lip that is not inrolled around the column. D simondii is a 4 to 12" [10 to 30 cm] plant with leaves broadest towards apex and slightly obliquely bilobulate apex and has an inflorescence that arises from the upper leaf axils and has flowers with the mid lobe of the lip that is open around the column. D venustum has a 12 to 18" [30 to 45 cm] stem and has narrowly oblong leaves and blooms on a terminal flowering inflorescence with the lip more closed around the column

Synonyms Dendrobium rupicola var breve [Rchb.f] Atwood

References W3 Tropicos, Kew Monocot list , IPNI ; Flora of Malaya Vol 1 Orchids Holttum 1953; The Orchids of Thailand Seidenfaden & Smitinand 1960 drawing fide; The Orchids of Thailand Seidenfaden & Smitinand 1965 corrections; AOS Bulletin Vol 39 No 5 1970 photo fide; Beautiful Thai Orchid Species Kamemoto & Sagarik 1975 photo fide; Miniature Orchids Northern 1980 photo good; Die Orchideen lieferung 11/12 633 - 752 Brieger 1981 photo plant only; AOS Bulletin Vol 52 #1 1983 as D rupicolum var brevephoto fide; Opera Botanica #83 Orchid Genera in Thailand XII Dendrobium Sw. Seidenfaden 1985 drawing/photo fide; A Guide to Orchids of the World Hodgson, Paine & Anderson 1991 Photo good; Thai Orchid Species Rakpaibulsombay 1992 photo fide; Miniature Orchids McQueens 1992 photo fide; The Manual Of Cultivated Orchid Species Bechtel, Cribb & Laurent 1992 photo good; The Illustrated Encyclopedia of Orchids Pridgeon 1992 photo fide; Identification of the Orchids [Orchidaceae Juss.] Vietnam Averyanov 1994; Manual of Orchids Stewart 1995; Orchid Species Culture, Dendrobium Bakers 1996; Dendrobium and its Relatives Lavarack, Harris and Stocker 2000 photo ok; Australian Orchid Review Vol 66 No 4 2001; A Field Guide to the Wild Orchids of Thailand Vaddhanaphuti 2001 photo fide; A field Guide to the Wild Orchids of Thailand Vaddhanaphuti 2005 photo good; The Dendrobiums H. P. Wood 2006 photo fide; Wild Orchids in Myanamar Vol 3 Tanaka 2007 photo fide; Orchids of India A Glimpse Misra 2007; Mille Et Une miniOrchidees Roguenant 2009 photo fide; A Field Guide to the Orchids of China Singchi, Zhongjian, Yibo, Xiaohua and Zhanhuo 2009 photo fide; A Compendioum of Miniature Orchid Species Vol 1 Parsons and Gerritsen 2013 photo fide; Turczaninowia 16(4):26-46 NEW AND RARE ORCHIDS (ORCHIDACEAE) IN THE FLORA OF CAMBODIA AND LAOS Averyanov 2013 ; Wild Orchids of Myanmar Hyan Tun [Mr Myanmar] 2014 Photo fide