Stem sometimes branched, usually flexuous, 25--80 cm, glabrous or slightly pubescent distally. Leaves oblanceolate or narrowly elliptic-oblanceolate to obovate, 8--13 × 2.5--4.5 cm, adaxially glabrescent, abaxially pubescent particularly along veins, base usually narrowed and subcuneate, margin ciliate, apex acuminate. Cymes terminal and also axillary in distal part of stem, laxly several flowered; pedicels 1--6 cm, pubescent or glabrous. Flowers trumpet-shaped. Tepals purple-white, with purple spots adaxially, lanceolate, oblanceolate, or oblong, 2--4 cm × 4--11 mm, abaxially usually laxly pubescent; outer ones basally saccate. Stamens usually included. Ovary glabrous. Style subequaling stigmatic lobes. Capsule 2.5--3.5 × 5--6 mm. Fl. and fr. (?Apr--)Oct--Nov.
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