Shrubs to giant trees. Leaves simple, 1-foliolate, or digitately 3-7-foliolate. Inflorescence terminal, an open or congested panicle or raceme, or reduced to a single flower. Flowers with the calyx cupular, campanulate or tubular, truncate, bilabiate or shallowly 5-lobed; corolla white, yellow, lavender, magenta, or red, tubular-infundibuliform to tubular-campanulate (Panama), glabrous or puberu-lous on the tube outside; anthers glabrous, the thecae straight, divaricate; pollen grains single, 3-colpate, the exine finely reticulate; ovary linear oblong, often somewhat lepidote, the ovules 2-multi-seriate in each locule. Fruit a subterete elongate-linear or short oblong capsule, dehiscing more or less perpendicularly to the septum, smooth to irregularly wavy-muricate, glabrous to lepidote or variously pubescent; seeds thin and bialate with hyaline-membranaceous wings, or thick, corky and suborbicular without wings
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