Dendrobium kelamense Metusala, P.O’Byrne and J.J.Wood 2010

SECTION Calcarifera

Photo By © Destario Metusala and World Press Orchid Article Website

Common Name The Bukit Kelam Dendrobium [A mountain in west Kalimantan Borneo]

Flower Size .8" [2 cm]

Found in western Kalamantan Borneo in hill forests at elevations of 500 to 800 meters as a large sized, warm growing epiphyte with clustered, spreading, erect to arching, simple, terete, broadest in the middle, green in youth becoming reddish brown and longitudinally sulcate with age stems carrying deciduous, elliptic to oblong, tapering to an obliquely acute apex, undulate margins, thin textured, mid nerve prominent on abaxial surface leaves that blooms in the spring on a pendulous, 3.4" [8.5 cm] long, 5 to 12 flowered inflorescence arising with triangular, acute floral bracts.

Similar to D panduriferum but D kelamense is distinguished by the glossy yellow flowers boldly marked with maroon red, narrower obtuse and shortly acuminate petals and a lip with spreading, obtuse side lobes, a broadly ovate to almost rectangular mid lobe which is pleated for some distance inwards from the margins which are undulating and denticulate to irregulaily erose, and a disc with a raised "U" shaped callus between the side lobes.

Synonyms Dendrobium subquadratum J.J. Sm. 1908; Sayeria subquadrata (J.J. Sm.) Rauschert 1983

References W3 Tropicos, Kew Monocot list , IPNI ; *Malesian Orchid Journal Vol 5 2010 photo/drawing fide; Dendrobium of Borneo Wood 2014 photo/drawing fide