Dendrobium sulcatum is native to India and Southeast Asia, including Myanmar, China, northern Thailand, Laos and Vietnam. In India, their natural habitats extend from the tropical valleys near Kalimpong and Darjeeling in Sikkim to the Khasi Hills (Khasia), Assam, Manipur and Megahalaya. In north-eastern India, they grow at heights of 500-1000 m.
It is a small to medium sized, warm growing epiphyte, which reaching 20-45 cm in height, that has flattened, 25 cm long, clavate pseudobulbs carrying 2 apical, ovate, 10-20 cm long leaves.
The Furrowed Lip Dendrobium blooms in the late spring on a short, pendulous inflorescence produced below the apical leaf and is not much longer with very short lived, fimbriate flowers. The flowers are 2.5-3.5 cm in diameter and have a shape similar to bowls or bells. The flakes of both whorls may be bright or faded yellow or orange-yellow with darker lines. The orange lip has red veins and brown or red-brown nerve veins on both sides at the base. The ruffle has a boat shape, it seems to be folded and has hairs along the banks. At the top, there are small, pincer-like appendages.
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