Shrubs or sometimes climbing herbs or epiphytic and becoming woody, branching near the base; branches terete to ? angulate, slender, jointed, usually nodose. Leaves short-petiolate; the lamina subcoriaceous to ? succulent, ovate to lanceolate, short-to long-acuminate at the apex, often becoming caudate apically, rounded to attenuate at the base, the costa and lateral veins prominent or not beneath. Flowers 5-merous, terminal, solitary or in few-flowered corymbs, short-pedicellate; calyx broadly campanulate or narrowly tubular, the lobes ovate or subulate; corolla showy, salmon-pink throughout, or red basally and yellow apically, the tube abruptly or gradually inflated, abruptly constricted at the throat, the lobes obsolete to small or linear-oblong, usually reflexed; stamens in-cluded to shortly exserted, the filaments inserted near the base of the corolla tube, the anthers linear to oblong, basifixed, rounded to ? emarginate at the apex; the style cylindrical, included to exserted, the stigma bilobate. Capsules split-ting septicidally, beaked by the persistent style; seeds irregularly covered with numerous short projections, dark brown on drying. Pollen grains united in tetra-hedral tetrads, 62-66 microns; single grains 3-porate, the pores well-defined and cir-cular, 6-8 microns in diameter, the pores of 2 contiguous grains separated by the rein-forced, internal walls; exine 4 microns thick; sexine thicker than nexine, reticulate, heterobrochate, the lumina 0.5-8 microns, the muri 1-1.5 microns wide (L. princeps from Colombia) .
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