Epiphytic shrub 2-4.5 dm tall;  stem terete, glabrous, the bark cracking irregularly and exfoliating in thin strips;  twigs subterete to terete, moderately to densely puberulent.  Leaves congested, thick and fleshy when fresh becoming thin and wrinkled when dry, oblong, obovate, somewhat spatulate, or rarely oblong-elliptic, (1-)1.5-2.5(-3) x (0.7-)1-1.8 cm, base broadly cuneate to obtuse, apex obtuse to broadly rounded, with a deciduous or persistent, weakly short-pilose apiculus 1-2 mm long, margin entire and slightly revolute, both surfaces minutely puberulent, also with weakly and minutely glandular-fimbriate with fimbriae ca. 0.1 mm long;  5-(-7)-plinerved from the base, midrib and lateral nerves conspicuously raised above and beneath, reticulate veinlets slightly raised on both surfaces;  petiole subterete, flattened above, 1-2(-4) mm long, puberulent.  Inflorescence of solitary, subsessile flowers in the axils of the upper leaves;  floral bract ovate, rounded, ca. 0.5 mm long, puberulent;  pedicel subterete, striate, 1-2 mm long;  bracteoles subopposite, broadly oblong to ovate, loosely clasping, 1.5-2 x 2-3 mm, fused below into a cupule 0.5-1 mm long, minutely appressed puberulous.  Flowers 4-merous, with calyx ca. 4.5-5.5 mm long;  hypanthium cylindric, ribbed, 2-3 mm long, puberulous;  limb 1-2.5 mm long;  lobes erect, lanceolate to narrowly triangular, acute to acuminate, 1.6-2.2 x ca. 1 mm at base, minutely puberulous;  sinuses acute;  corolla white, barrel-shaped to somewhat funnel-form or cylindric-campanulate, 5.5-10 mm long and 3.5-9 mm apical diam., glabrous to sparingly spiculate, the lobes oblong-elliptic to broadly deltate, acute, 3.5-5 x ca. 3-4 mm;  stamen 8, ca. 5 mm long;  filaments 1.5-2.5 mm long, weakly ciliate;  anthers 2.5-3.5 mm long;  thecae smooth, 1.5-2 mm long;  tubule 1, ca. 1-1.6 mm long, dehiscing by a single, more or less terminal, obliquely introrse, circular pore;  style 4.8-5.3 mm long, glabrous.  Berry translucent white.

    Distribution.  Panama, Costa Rica, Colombia, and Ecuador;  rare, and known only from ca. 12 collections altogether;  rainforest at 450-530 m altitude.

    This species seemingly is always associated with a colony of aggressive ants.