Dendrobium pleiostachyum Rchb.f., Gard. Chron. (1882, II) 520.
Type: Veitch cult. (Macfarlane) s.n.
Stems flexuose, grooved. Leaves not known. Inflorescences many, racemose, 2-3.5 cm long, straight, densely many(?)-flowered. Floral bracts triangular, minute, reflexed. Flowers c. 1.4 cm long. Dorsal sepal triangular, 0.4-0.5 cm by 2 mm, apex acute. Mentum one and a half times as long as the free part of the lateral sepals, obliquely truncate, hardly closed in front. Petals ovate-triangular, 0.4-0.5 cm by 2 mm, margins slightly erose. Lip narrowly pandurate-oblong, 1.4 by 0.3 cm, in the basal third with a crescent-shaped call. Column with large, denticulate stelidia, filament subulate.
(after Kraenzlin, 1910).
Colours: Flower white.
Habitat: Not known.
Flowering time in the wild: Not known.
Distribution: New Guinea (endemic).
Distribution in New Guinea: Papua New Guinea (South-eastern part).
Notes: A poorly known species of section Pedilonum.