Dendrobium loesenerianum Schltr., Repert. Spec. Nov. Regni Veg. Beih. 1 (1912) 522; 21 (1923) t. 177, fig. 662.
Type: Schlechter 20280 (holo B, lost; iso AMES, BO, G, L, NSW).
Rhizome very short, roots elongated, filiform, flexuose, glabrous. Stems crowded, patent, slender, up to 60 cm long, many-leaved, not or sparsely branched. Leaf sheaths entirely covering the stem. Leaves erect-patent to subpatent, lanceolate, 5.5-8 by 1.1-1.3 cm, apex obliquely aristate-apiculate, thin-textured. Inflorescences racemose, very short, 3-8-flowered. Floral bracts ovate, much shorter than the pedicel and ovary, apex apiculate. Pedicel and ovary 1.7 cm long, slender, glabrous. Flowers resupinated or not, c. 2 cm across. Dorsal sepal oblong-elliptic, 1.1 cm long, apex obtuse. Lateral sepals obliquely oblong-elliptic, widened at the base, 1.1 cm long, apex obtuse; mentum conical, 0.6 cm long, obtuse. Petals obliquely oblong-subspathulate, c. 1 cm long, apex obtuse. Lip concave, at the base narrowly cuneate, in apical part obovate, 1.9 by 0.7 cm, apical margin undulate, pectinate-denticulate, apex hood-like. Column short, on either side just above the base with a small tooth; clinandrium 3-lobulate, lateral lobules falcate-triangular, subacute, the median longer and tooth-like; column-foot ligulate, 0.6 cm long, in the middle somewhat swollen and thickened. Anther subreniform-quadrate, at the back retuse, in front truncate, glabrous.
(after Schlechter, 1912).
Colours: Salmon-coloured with purple-red veins, apex of lip purple-red, anther violet.
Habitat: Epiphyte in lower montane forest. Altitude 1000 m.
Flowering time in the wild: September.
Distribution: New Guinea (endemic).
Distribution in New Guinea: Papua New Guinea (Sandaun Province: Torricelli Mountains).
Notes: Related to Dendrobium trichostomum.
Cultivation: Intermediate growing epiphyte.