Tall herbs, the stems relatively slender, drying sulcate, glabrous or scabridulous pubescent; roots orange. Leaves opposite, ovate to linear, coriaceous, scabrous, 'A number of synonyms are given by Werner, 1960. Only the above name has been used for Panamanian material. Werner also presented a number of infraspecific taxons. at least above, digitately nerved. Inflorescences of solitary or geminate flowers in the axils of upper leaves, sometimes aggregated into racemes or panicles; peduncles stout, bibracteate in the upper '/2. Flowers showy, the calyx tubular, 5 or 10 nerved, apically 3-6 lobate, the lobes sometimes irregular, corolla tubular salverform, the tube long and slender, the limb spreading with 5 rounded lobes; stamens 4, the filaments inserted '/2 way up the tube, ciliate, the anthers long sagittate, included; style bent apically, the stigma running along one side Or the style apex. Capsule included, the seeds relatively large.
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