Oberonia microtatantha Schltr., Repert. Spec. Nov. Regni Veg. 17 (1921) 371
Type: Kempf s.n. (border between German and English New Guinea) (holo B, lost)
Epiphytic, small, up to 12 cm high. Rhizome very short; roots filiform, flexuose, slender, glabrous. Stems flexuose, 3-4-leaved, c. 3.5 cm long. Leaves erect-patent, equitant, linear-falcate, acute, 3-5.5 cm long, near the middle 0.25-0.33 cm wide. Inflorescence subsessile, elongated, narrow, up to 12 cm long, c. 0.3 cm diam. across the flowers, very many-flowered. Floral bracts ovate, acuminate, subpatent, with irregular margins. Flowers almost whorled, extremely small, glabrous, not resupinated, hardly more than 0.1 cm across. Sepals patent, broadly ovate, obtuse. Lateral sepals oblique. Petals oblong-elliptic, obtuse, with slightly irregular margins, a little shorter than the sepals. Lip erect, a little longer than the sepals, deeply 3-lobed, at the base somewhat cordate, lateral lobes obliquely quadrate, broadly obtuse, mid-lobe almost twice as large as the lateral lobes, narrowed at the base, suborbicular, notched at the apex, in apical half with irregular margins. Column very short, rather thick. Ovary cylindrical, glabrous, 0.08 cm long. (After Schlechter, 1921)
Colours: Not recorded.
Habitat: Not recorded.
Flowering time in the wild: Not recorded.
Distribution: Malesia (New Guinea, endemic).
Distribution in New Guinea: Papua New Guinea ('near border between German and British New Guinea'), exact locality not recorded.
Cultivation: Epiphyte. Requirements unknown.