Dendrobium sanguinolentum Lindl. 1842 SECTION Calcarifera J.J.Sm Photo by Lourens Grobler

Flower from Borneo Photo courtesy of Peter O'Byrne, Dr. E.F. de Vogel and Jaap Vermeulen and Their Netherlands National Herbarium Website. and Flora Malesiana Vol III

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Common Name The Blood-Stained Dendrobium

Flower Size to 1" [to 2.5 cm]

A Malaysian, Thai, Sumatran and Bornean [Philippines?] species found in lowland and hill forests on roadside trees at altitudes of sealevel to 600 or 900 meters as a medium to large sized, warm, pendent growing epiphyte with purple, thick, horizontal to pendulous, cylindrical stems carrying many, evergreen, reddish or purple in youth, maybe deciduous leaves that have purple veined leaf sheaths and flowers in the summer and fall on a short to 1 to 1 1/2" [2.25 to 3.75 cm], raceme with a densely few to several [2 to 6], waxy, longlasting flowers arise from the nodes at the apex of leafless canes.

Fertilizer can be reduced through all the winter months but water should stay more constant with only a drier period for 1 to 2 months.

D kentrochilum is often cited as a synonym but it differs in the broader leaves and a lip with a deeper incision between the hypochile and the orbicular epichile as well as 1 to 2 flowered inflorescence.

Many authorities put D cerinum as a synonym of D sanguinolentum but I along with Cootes [1999] and Wood [2006] keep it separate pending more information.

I do not see how, if the determination of D cerinum as D sanguinolemntum iscorrect, #1 there are no lobes to the lip, this one has an entire apical lip and D sanguinolentum has a bilobed apical lip. More research needed here.

Synonyms Anisopetala sanguinolenta (Lindl.) M.A.Clem. 2003; Callista sanguinolenta (Lindl.) Kuntze 1891; Pedilonum sanguinolentum (Lindl.) Brieger 1981

References W3 Tropicos, Kew Monocot list , IPNI ; Materials For a Flora of the Malayan Penninsula Part 1 Ridley 1907; Orchidaceae Monandre-Dendrobiinae Fr. Kraenzlin 1910; Die Orchideen Schlechter 1915; Die Orchideen 2 Auflage Schlechter 1927; Icones Plantarum Vol 21 Hooker 1890 as D kentrochilum drawing ok; Atlas des Orchidees Cultivees Constantin 1920 drawing fide; Flora of Malaya Vol 1 Orchids Holttum 1953 drawing fide; The Orchids of Thailand Seidenfaden & Smitinand 1959 drawing does not match; Encyclopedia of Cultivated Orchids Hawkes 1965; Die Orchideen lieferung 11 Schlechter/Brieger 1981 as Pedilonum sanguinolentum; Orchid Digest Vol 47 No 5 1983 drawing/photo fide; Orchidiana Philipiniana Vol 1 Valmayor 1984 as D cerinum; Orchids of Java Comber 1990 photo fide; The Orchids of Penninsular Malaysia and Singapore Seidenfaden & Wood 1992 drawing fide; Thai Orchid Species Rakpaibulsombay 1992 photo fide to the second photo; The Plants of Mount Kinabalu Vol 2 Orchids Wood Beaman & Beaman 1993; A Checklist of the Orchids of Borneo Wood & Cribb 1994 drawing/photo ok; Manual of Orchids Stewart 1995; Orchid Species Culture; Dendrobium Bakers 1996; Dendrobium and its Relatives Lavarack, Harris and Stocker 2000 photo fide; The Orchids of the Philippines Cootes 2001 as D cerinum photo ok; Orchids of Sumatra Comber 2001 photo fide; A to Z of South East Asian Orchid Species Vol 1 O'Byrne 2001 photo fide; A to Z of South East Asian Orchid Species Vol 1 O'Byrne 2001 photo fide; Orchids of Sarawak Beaman, Wood, Beaman & Beaman 2001; Flora Malesiana Orchids of the Philippines Vol I Agoo, Shuiteman and de Vogel 2003; A field Guide to the Wild Orchids of Thailand Vaddhanaphuti 2005 photo fide; The Dendrobiums H. P. Wood 2006 photo fide; Malesian Orchid Journal Vol 3 2009; Philippine Native Orchid Species Cootes 2009 as D cerinum photo fide; The Orchids of Mount Kinabalu Vol 1 Wood, Beaman, Lamb, Chu Lun and Beaman 2011; The Orchids of Mount Kinabalu Vol 2 Wood, Beaman, Lamb, Chu Lun and Beaman 2011 photo good; Wild Orchids of Penninsular Malaysia Ong, O'Byrne, Yong & Saw 2011 photo fide; Dendrobium of Borneo Wood 2014 photo/drawing fide; Genera Orchidacearum Vol 6 Epidendrodeae Part 3 Pridgeon, Cribb, Chase and Rasmussen 2014

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