Herbs erect, branched from base and often with strict, narrowly ascending branches, 5–20 dm. Stems: internodes 4-lined at first, then 4-angled. Leaves spreading, sessile, amplexicaul; blade ovate-lanceolate to lanceolate or oblong, 40–85 × 18–37 mm on main stem, smaller distally and on branches, base rounded to cordate, margins plane, apex usually acute to apiculate, sometimes obtuse, midrib with 4–7 pairs of branches, tertiary veins densely reticulate toward margins. Inflorescences cylindric to narrowly pyramidal, 1–35-flowered. Flowers: sepals ovate to lanceolate or oblong-elliptic, subequal or equal, 8–13 × 4–8 mm, apex acute to acuminate; petals golden yellow, sometimes red-tinged, narrowly obovate to oblanceolate-falcate, 25–40 mm; styles (4–)5, 3–7 mm. Capsules ovoid, 12–20(–30) × 10–13 mm. Seeds 1.5 mm, narrowly winged; testa shallowly linear-reticulate.
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