Dendrobium verruculosum Schltr., Repert. Spec. Nov. Regni Veg. Beih. 1 (1912) 519; 21 (1923) t. 176, fig. 658.
Type: Schlechter 19635 (holo B, lost).
Rhizome very short, roots elongated, filiform, flexuose, glabrous. Stems crowded, erect to patent, slender, up to 45 cm long, many-leaved, not branching. Leaf sheaths entirely covering the stem, densely verruculose. Leaves patent, lanceolate-ligulate, 4.5-5.5 by 0.8-1.2 cm, apex acute, apiculate. Inflorescences racemose, very short, 5-7-flowered. Floral bracts ovate, much shorter than the pedicel and ovary, apex shortly acuminate. Pedicel and ovary 2 cm long, slender, glabrous. Flowers resupinated or not, c. 2 cm long. Dorsal sepal ovate-elliptic, 0.8 cm long, apex obtuse. Lateral sepals very broadly obliquely triangular, 0.8 cm long, apex apiculate; mentum conical, 1.3 cm long, obtuse. Petals obliquely oblong-ligulate, 0.65 cm long, apex obtuse. Lip concave, with a narrow claw, gradually widened a little towards the apex, 1.5 by 0.5 cm, apical margin serrate-dentate, c. 6-plicate, apex hood-like, truncate, distinctly shorter than the column. Column short; column-foot 1.3 cm long, adnate to the margins of the lip for more than half its length, near the apex with an elliptic cavity which has a marginal tooth. Anther rounded-cucullate, in front broadly obtuse and papillose.
(after Schlechter, 1912).
Colours: Flowers orange-yellow with lighter tips, column light yellow, anther violet.
Habitat: Epiphyte in lower montane forest. Altitude 600 to 1450 m.
Flowering time in the wild: January to May, October.
Distribution: New Guinea (endemic).
Distribution in New Guinea: Papua (Jaya Wijaya Regency); Papua New Guinea (Southern Highlands, Morobe, and Oro Provinces).
Notes: One of several species in the Calyptrochilus group in which the lip is distinctly shorter than the column.
Cultivation: Intermediate growing epiphyte.