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Terrestrial or epiphytic, caulescent, spreading, prostrate, pendulous, to erect herbs or small shrubs, without modified stems. Stems rarely branched. Leaves opposite, equal or unequal in a pair, venation pinnate, foliar nectaries absent. Flowers axillary, solitary or in fasciculate few-10-flowered inflorescences; epedunculate; bracteoles small (in Guianan species), sometimes caducous; usually pedicellate. Calyx lobes 5, usually free nearly to base; corolla usually red, less commonly yellow, rarely greenish or cream, tubular or ventricose, limb 5-lobed; stamens exserted or included, filaments basally connate, anthers coherent in 2 pairs, dehiscing by longitudinal slits, thecae parallel, not divergent; staminode absent or minute; disc a single dorsal 2-lobed gland or rarely 5 separate glands; ovary superior, stigma stomatomorphic or 2-lobed. Fruit a fleshy, indehiscent, white or colored berry.
Perennial suffrutescent or succulent herbs or small shrubs, stems often having adventitious roots at the nodes, epiphytic or terrestrial, habit erect, spreading, prostrate or pendulous. Leaves opposite, more or less petiolate, those of a pair equal to strongly unequal; blades various in shape, usually with a character-istic indumentum. Flowers axillary, sometimes showy, more or less pedicellate,
