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Dendrobium indivisum [Blume] Miq. 1859 SECTION Aporum

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Common Name The Undivided Dendrobium [refers to the lip] - In Thailand - Tansian Mai

Flower Size .1 to .4" [.3 to .9 cm]

Found in Myanmar, Thailand, Vietnam, Malaysia, Sumatra, Java, Borneo, and the Molucca Islands in semi-deciduous and deciduous dry lowland forests and savana-like woodlands as a small to medium sized, hot to cool growing epiphyte at elevations of 400 to 1600 meters with curved, unbranched, leafy stems carrying, many, lanceolate, imbricating, spreading leaves that blooms on a very short inflorescence with a single, tiny, fan-shaped flower arising from the bases of the numerous imbricate leaves occuring in the summer to winter.

Water should be lessened in the fall and then in late winter almost curtailed. Fertilizer should be stopped as soon as the plant is not actively growing. Both water and fertilizer should be resumed with the onset of new growth in the spring.

Synonyms Aporum fuscum (P.O'Byrne) M.A.Clem. 2003; Aporum incrassatum Blume 1825; *Aporum indivisum Blume 1825; Aporum porphyrophyllum (Guillaumin) M.A.Clem. 2003; Callista eulophota (Lindl.) Kuntze 1891; Callista incrassata (Blume) Kuntze 1891; Callista indivisa (Blume) Kuntze 1891; Dendrobium eulophotum Lindl. 1859; Dendrobium incrassatum [Bl.]Miq. 1859; Dendrobium indivisum var. fuscum P.O'Byrne 1997; Dendrobium indivisum var. lampangense Rolfe 1925; Dendrobium indivisum var. pallidum Schweinf. 1985; Dendrobium neolampangense Aver. 1988; Dendrobium porphyrophyllum Guillaumin 1955

References W3 Tropicos, Kew Monocot list , IPNI ; Orchids of Burma Grant 1895/1995 as D eulophotum; Die Orchideen Von Java J.J.Sm. 1905; Materials For a Flora of the Malayan Penninsula Part 1 Ridley 1907 as D eulophotum; ; Die Orchideen Von Java Figuren Atlas J.J.Smith 1908 drawing fide; Orchidaceae Monandre-Dendrobiinae Fr. Kraenzlin 1910; Orchidaceae Monandre-Dendrobiinae Fr. Kraenzlin 1910 as D eulophotum; Contributions to the Knowledge of the Orchid Flora of Sumatra Schlechter 1911; Flora of Malaya Vol 1 Holttum 1953 drawing fide; The Orchids of Thailand Seidenfaden & Smitinand 1960 drawing fide; The Orchids of Thailand Seidenfaden & Smitinand 1960 as D indivisum var lampangense drawing fide; The Orchids of Thailand Seidenfaden & Smitinand 1965 corrections; The Orchids of Thailand Seidenfaden & Smitinand 1965 corrections as D indivisum var lampangense ; AOS Bulletin Vol 39 No 5 1970; Orchids of Asia Soon 1980 photo fide; Die Orchideen lieferung 11 Schlechter/Brieger 1981 as Aporum incrassatum; Opera Botanica #83 Orchid Genera in Thailand XII Dendrobium Sw. Seidenfaden 1985 drawing/photo fide; Opera Botanica #83 Orchid Genera in Thailand XII Dendrobium Sw. Seidenfaden 1985 as D indivisum var lamangense drawing fide; Opera Botanica #83 Orchid Genera in Thailand XII Dendrobium Sw. Seidenfaden 1985 as D indivisum var pallidum photo fide; Orchids of Java Comber 1990 photo fide; Orchids Travel By Air A Pictoral Safari Mulder, Mulder-Roelfsema and Schuiteman 1990 photo fide; The Orchids of Penninsular Malaysia and Singapore Seidenfaden & Wood 1992 drawing fide; The Plants of Mount Kinabalu Vol 2 Orchids Wood Beaman & Beaman 1993; A Checklist of the Orchids of Borneo Wood & Cribb 1994; Identification of the Orchids [Orchidaceae Juss.] Vietnam Averyanov 1994; Identification of the Orchids [Orchidaceae Juss.] Vietnam Averyanov 1994 as D porphyrophyllum; Orchid Species Culture, Dendrobium Bakers 1996; Dendrobium and their Relatives Lavarack, Harris and Stocker 2000 photo ok; Orchids of Sarawak Beaman, Wood, Beaman & Beaman 2001; Orchids of Sumatra Comber 2001 photo ok; A Field Guide to the Wild Orchids of Thailand Vaddhanaphuti 2001 photo ok; A field Guide to the Wild Orchids of Thailand Vaddhanaphuti 2001 as D indivisum var lampangense photo hmm; 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 3 2004; A field Guide to the Wild Orchids of Thailand Vaddhanaphuti 2005 photo fide; A field Guide to the Wild Orchids of Thailand Vaddhanaphuti 2005 as D indivisum var lampangense photo good; The Dendrobiums H. P. Wood 2006 photo fide; The Dendrobiums H. P. Wood 2006 as D porphyrophyllum photo fide; Malesian Orchid Journal Vol 6 2010; 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; Turczaninowia 16(4):26-46 NEW AND RARE ORCHIDS (ORCHIDACEAE) IN THE FLORA OF CAMBODIA AND LAOS Averyanov 2013 ; Dendrobium of Borneo Wood 2014 photo/drawing fide

Dendrobium indivisum var. fuscum P.O'Byrne 1997

A dark Color form f the species.

References W3 Tropicos, Kew Monocot list , IPNI ; Dendrobium of Borneo Wood 2014 photo/drawing fide

Dendrobium indivisum var. lampangense Rolfe 1925

Drawing by Seidenfaden

found in Laos, Thailand and Vietnam as a mini-miniature sized epiphyte that differs form the type in the lip shape

Synonyms Dendrobium neolampangense Aver. 1988

References W3 Tropicos, Kew Monocot list , IPNI ; Opera Botanica #83 Orchid Genera in Thailand XII Dendrobium Sw. Seidenfaden 1985 drawing/photo fide;

Dendrobium indivisum var. pallidum Schweinf. 1985

Plant and Flower

A pale yelow color form of the previous species.

References W3 Tropicos, Kew Monocot list , IPNI ; Opera Botanica #83 Orchid Genera in Thailand XII Dendrobium Sw. Seidenfaden 1985 drawing/photo fide; The Plants of Mount Kinabalu Vol 2 Orchids Wood Beaman & Beaman 1993; A Checklist of the Orchids of Borneo Wood & Cribb 1994; A field Guide to the Wild Orchids of Thailand Vaddhanaphuti 2005 photo fide; The Dendrobiums H. P. Wood 2006 photo fide; Dendrobium of Borneo Wood 2014 photo fide

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