Psammisia flexicaulis Sleumer, Feddes Repert. Spec. Nov. Regni Veg. 45: 17.  1938.  Type.  Ecuador.  Pastaza:  Canelos, 350 m, 16 Feb 1937 (fl), Schultz-Rhonhof 2217 (holotype, B†).  The holotype was destroyed and there are no known photos or duplicates.

    Epiphytic shrub, sometimes lianoid with branches to 3 m long;  stem thin, terete, glabrous;  twigs subterete, bluntly complanate, striate, glabrous or minutely puberulent.  Leaves chartaceous, elliptic, oblong-elliptic, or ovate-lanceolate, 10-25 x 3-8 cm, base cuneate to rounded, apex abruptly cuspidate-acuminate to acuminate, margin entire, glabrous or nerves puberulent beneath;  3(5-)-plinerved from near the base, midrib impressed to plane distally above, prominently raised beneath, inner lateral nerves joined with midrib for up to 1 cm, impressed above and prominently raised beneath, reticulate veinlets plane to slightly impressed above, slightly raised beneath but often not conspicuous;  petiole terete, rugose, 4-7(-9) mm long, glabrous to puberulent.  Inflorescence axillary, short-racemose,ca. 5-flowered;  rachis subterete, smooth, congested, to 12 mm long, glabrous;  floral bract erect or reflexed, ovate, acute,ca. 2 mm long;  pedicel subterete, thin, 9-17 mm long, glabrous or puberulent, with glandular fimbriae at distal tip;  bracteoles nearly basal, broadly ovate, acute,ca. 1-1.5 mm long, marginally glandular-fimbriate, the base sometimes darker in color and possibly there glandular.  Flowers with calyxca. 4 mm long;  hypanthium campanulate or cylindric,ca. 1-2.5 mm long, glabrous or puberulent;  limb campanulate-spreading,ca. 1.5-2 mm long andca. 3.5 mm diam.;  lobes broadly ovate, apiculate, less than 1 mm long, the margins appearing thin or torn;  sinuses acute;  corolla cylindric, swollen below, once-constricted near apex, 15-18 mm long and 4-5 mm diam., glabrous, sparsely glandular-fimbriate distally, rose-red basally turning white at constriction at throat, the lobes spreading and reflexed, oblong-triangular, acute,ca. 3 mm long, white;  stamen (8-)10,ca. 8.5-9 mm long;  filaments distinct,ca. 3 mm long, glabrous or minutely ciliolate distally, the connectives conspicuously spurred at apex, the alternate ones more prominent;  anthersca. 6.8-7 mm long;  thecaeca. 3.5-4.5 mm long, the base sometimes incurved;  tubules distinct or coherent near base,ca. 2.3-2.5 mm long, dehiscing by cleftsca. 1.5 mm long;  style exserted, glabrous.  Immature berry spherical,ca. 10 mm diam., green.

    Distribution.  Endemic to the Oriente of Ecuador;  tropical moist and wet forest to premontane wet and rainforest at 250-1450 m altitude.