Dendrobium macrum Schltr., in K.Schum. & Lauterb., Nachtr. Fl. Deutsch. Schutzgeb. Südsee (1905) 174; Repert. Spec. Nov. Regni Veg. Beih. 21 (1928) t. 211, fig. 796.
Type: Schlechter 14551 (holo B, lost).
Synonyms:
Rhizome very short, roots elongated, filiform, flexuose, glabrous. Stems crowded, erect, terete, unbranched, slender, 15-20 cm long, many-leaved. Leaves erect-patent, narrowly linear, 3-4 by 0.15-0.2 cm, apex minutely emarginate, papyraceous. Inflorescences arising laterally from the stem, 1-flowered, sessile. Ovary 0.3 cm long, cylindrical, glabrous. Floral bract minute, ovate, acuminate. Flower not resupinated, c. 0.6 cm across. Dorsal sepal ovate-oblong, 0.4 cm long, apex obtuse. Lateral sepals strongly obliquely ovate-oblong, much widened at the base, 0.4 cm long, apex obtuse. Petals obliquely linear-lanceolate, 0.4 cm long, apex acute. Lip 3-lobed above the middle, 0.6 by ; lateral lobes short, obtuse; midlobe much larger, very broadly ovate, shortly acuminate. Column short, clinandrium crenulate with a median dorsal tooth; column-foot large. Anther subquadrate, dorsally excised.
(after Schlechter, 1905).
Sepals and petals white, column and lower half of lip speckled with red.
Epiphyte in hill and montane forest. Altitude 600 to 1500 m.
New Guinea (endemic).
Papua New Guinea (Enga and Madang Provinces).
Intermediate growing epiphyte.
February, April, June, September.
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