Bulbophyllum elongatum (Blume) Hassk., Cat. Hort. Bot. Bogor (1844) 39
Basionym: Ephippium elongatum
Rhizome 5-13 mm diam., sections between pseudobulbs 3-17 cm long. Pseudobulbs distant, ovoid, 0.8-1.6 by 0.6-1.5 cm. Petiole 5.5-22 cm. Leaf blade elliptic, 20-50 by 6-16 cm, index (length/width) 3.1-3.9; acute to acuminate. Inflorescence a dense raceme, with the flowers in irregular whorls, erect to patent, 24-65 cm, 30-100-flowered. Peduncle 14-53 cm; bracts 7-8, the longest 25-80 mm long. Rachis 3-12 cm, nodding near its base. Floral bracts ovate, 7-13 by 1.5-4 mm, acute. Pedicel and ovary 5-6 mm long. Median sepal elliptic, 12.5-17.5 by 3.8-4 mm, index 3.3-4.6; obtuse to acuminate, margins entire; glabrous, base rather narrowly attached; rather thin. Lateral sepals somewhat falcate, 12-16 by 3.5-4.5 mm, index 3.2-4; acute to acuminate, otherwise as the median sepal. Petals porrect, falcate, linear, tapering from a wide base, 10.5-15 by 1.2-1.8 mm, index 7.2-10; obtuse to acute, margins entire; glabrous, base broadly attached; thin, top thickened; with 1 vein. Lip reflexed in the basal half, triangular with a projecting, linguiform top, 2.7-3.3 by 2.4-3 mm, index 1-1.2; rounded, margins entire; glabrous, rather thin, top thick; adaxially flat near the base, with 3 ridges without protruding knobs: 2 weak, rounded ridges, most conspicuous distally, the space in between channelled and with a inconspicuous, rounded median ridge with longitudinal rows of minute papillae on its crest proximally; abaxially with rather inconspicuous, truncate ridge up to about 1/2 of the length of the lip. Column 4.4-5 mm long. Stelidia narrowly triangular, 1.5-2.2 mm long, acute, with a small, antrorse, deltoid, obtuse to acute tooth along the upper margin; with an often inconspicuous, deltoid, obtuse tooth along the lower margin, at the base. (After Vermeulen, 2002)
Colours: Sepals and petals white with purple spots. Lip yellow with fine red dots.
Flowering time in the wild: March, November, December.
Distribution: Malesia (Peninsular Malaysia, Sumatra, Java, Borneo, New Guinea, Philippines).
Distribution in New Guinea: Papua (Indonesia); Papua New Guinea; see map 96-583M.jpg.