Bulbophyllum orohense J.J.Sm., Meded. Rijks-Herb. 23 (1915) 11
Type: Pulle 1139 (holo L; not BO)
Rhizome pendulous, rooting at the base, branching, terete, branches (widely) patent, sheaths rather short, tubular, subulate-acuminate, keeled, when dried papillose, c. 0.5 cm. long. Pseudobulbs spirally arranged, 0.35 cm. long, 1-2 cm apart, at the very oblique base adnate to the rhizome, the free apex short and erect-patent, 1-leaved. Leaves narrowly lanceolate, acute, narrowed at base, 5-nerved, 1.25-2 cm. long. Inflorescences fascicled at the nodes of the rhizome, very short, 1-flowered; peduncle appressed, 0.08 cm long, with a few tubular peduncle-scales. Floral bract obliquely cup-shaped, enclosing the ovary, keeled, 0.07 cm. long. Flower glabrous, 0.36 cm. long. Median sepal erect, making an obtuse angle with the ovary and an acute angle with the lateral sepals, triangular-oblong, obtuse, concave, 3-nerved, 0.38 by 0.14 cm. Lateral sepals inserted on the column-foot, porrect, cohering up to the apex, obliquely triangular, somewhat falcate, rather obtuse, concave, 3-nerved, 0.37 cm. long, near the base 0.2 cm wide. Petals smaller, oblong, subulate-acuminate, near the top slightly dentate, 1-nerved, 0.23 by 0.08 cm. Lip attached to the column-foot by a thin, 3-nerved membrane, erect, above the base and above the middle obtusely recurved, 3-lobed, not ciliate, at the base semiorbicular incised, shortly obtusely 2-dentate, inside near the base with an erect, subconical, at the back concave horn; when flattened in outline subrhombic, 0.22 cm long, between the lateral lobes 0.08 cm wide; hypochile cuneate, concave, with a longitudinal, linear, convex-swollen band; lateral lobes erect, short, broadly subtriangular, slightly falcate-incurved, obtuse, convex, inside concave; mid-lobe porrect, ovate-elliptic, rounded, convex, somewhat fleshy, 0.08 cm long. Column without anther 0.07 cm long, clinandrium hollow, with wavy margins, filament subulate. Anther cucullate, papillose. Stigma longitudinal, elliptic. column-foot making an obtuse angle with the ovary, oblong, very obtuse, concave, somewhat fleshy, 0.17 cm long. Ovary shortly obconical, 6-grooved, ).05 cm long. (After Smith, 1916)
Colours: Flower yellowish green.
Habitat: Epiphyte in lower montane forest; 1400 m.
Flowering time in the wild: February.
Distribution: Malesia (New Guinea).
Distribution in New Guinea: Papua (Indonesia); see map 96-1318M.jpg.
Cultivation: Intermediate growing epiphyte.