Epiphytic vine;  mature stems terete, minutely striate, glabrous, grayish-brown when dry;  immature stems and twigs of new growth subterete or flattened, striate, glabrous, tan when dry.  Leaves coriaceous, opposite or subopposite, clasping the stem (slightly amplexicaul), oblong, elliptic or ovate-elliptic, 12-25 x 5-9 cm, basally rounded and auriculate, apically acuminate, bright green when fresh but becoming brown to somewhat flesh-colored when dry, glabrous;  pinnately veined, the midrib thickened and slightly elevated in proximal half becoming thin and plane to slightly impressed in distal half above, raised and conspicuous beneath, lateral nerves 5-8 per side, anastomosing near margins, impressed above and raised beneath, veinlets impressed above and slightly raised beneath;  petiole ca. 2 mm long, glabrous, difficult to distinguish.  Inflorescences 1-3 in axils of fallen leaves, racemose, 6-flowered;  rachis subterete or sharply angled, striate, glabrous, ca. 1 cm long and 1-1.5 mm in diam.;  floral bracts persistent, ovate, ca. 2 mm long and broad, marginally with a few tiny glandular fimbriae, and with a few short-tufted hairs at apex;  pedicels decussate, subterete, striate, glabrous, 15-18 x 1 mm;  bracteoles located two-thirds up the pedicel, similar to floral bracts but 1.5 mm long and broad.  Flowers with calyx glabrous, 4.5-5.5 mm long, red when fresh;  hypanthium campanulate, strongly rugose, 3-4.5 mm long and 4-5 mm in diam. at apex;  limb short-cylindric, 1-1.5 mm long including apiculate lobes;  sinuses flat;  corolla cylindric when fresh but conspicuously constricted in the distal half after drying, 13-15 mm long, glabrous but with scttered glandular fimbriae in the distal half, yellowish-green with pale or whitish-green lobes, each lobe with a short, red streak over a slightly thickened area in middle of lobe, the lobes triangular, 1.5 mm long, slightly spreading at anthesis;  stamens 10, ca. 7 mm long;  filaments distinct, densely short-pilose in distal half, ca. 1.5 mm long, slightly widened at base;  alternate connectives conspicuously thickened;  anthers 6-6.5 mm long including tubules;  thecae strongly granular;  tubules conically narrowed to apex, 1-1.5 mm long, dehiscent nearly along entire length;  style exserted at anthesis, ca. 18 mm long.  Berry not seen.

    Distribution.  Known only from the type locality, exactly along the Panama-Colombia border, at 1400-1500 m.  Rare and endangered.