Dendrobium tridentiferum Lindl., London J. Bot. 2 (1843) 237.
Type: Not designated.
Stems stout, tall, leafy, internodes 2.5-3 cm long. Leaves oblong-lanceolate, 12 by 2.5 cm, rather fleshy, apex acute, obliquely bilobulate. Inflorescences short, 2-flowered. Flowers c. 2 cm across. Dorsal sepal oblong, keeled, apex acute. Lateral sepals obliquely ovate, apex acute; mentum very short, rounded. Petals oblong-lanceolate, apex acute. Lip 3-lobed, on the disc with a wart-like callus and a median keel; lateral lobes obliquely ovate, falcate, acute; midlobe ovate, acute.
(after Kraenzlin, 1910).
Colours: Flower perhaps white.
Habitat: Not known.
Flowering time in the wild: Not known.
Distribution: New Guinea (endemic).
Distribution in New Guinea: Not known.
Notes: One of the earliest species of section Grastidium to be described, but as yet also one of the most obscure ones.