Stems erect, sparingly branched, 1-1.5(-20) dm, stipitate-glandular, especially distally; rhizomes slender or slightly thickened; bulblets absent. Leaves whorled to opposite distally; petiole 0.4-1.5 cm, eciliate; blade lanceolate to elliptic or oblanceolate, 6-15 × 2-6 cm, base rounded to cuneate, slightly decurrent, margins entire, slightly revolute or plane, eciliolate, apex acute, surfaces punctate at least abaxially, stipitate-glandular abaxially and, sometimes, adaxial veins sparsely pubescent; venation pinnate-arcuate. Inflorescences terminal, panicles, 6-25 cm. Pedicels 0.3-0.6 cm, stipitate-glandular. Flowers: sepals 5, calyx not streaked, 4-6 mm, stipitate-glandular at least marginally, lobes lanceolate, margins darkly thickened; petals 5, corolla yellow, not streaked, rotate to slightly campanulate, 6-11 mm, lobes with margins entire, apex acute to obtuse, finely and minutely stipitate-glandular; filaments connate 1.3-1.7 mm, shorter than corolla; staminodes absent. Capsules 3-5 mm, not punctate, glabrous.
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