Herbs erect or ascending, rarely with rooting base, <bushy>, 1.5–3.3 dm. Stems: internodes (at least some) 4-lined, without black glands. Leaves spreading, sessile or petiolate (to 0.5 mm); blade narrowly elliptic or narrowly oblong to linear, <usually conduplicate, sometimes falcate>, 13–22 × 1.5–8 mm, base cuneate, margins plane, apex acute to subacute, midrib with 2–4 pairs of branches, black glands marginal. Inflorescences subcapitate to cylindric, 1–7-flowered. Flowers 20–35 mm diam.; sepals markedly imbricate, spreading in fruit, broadly to narrowly ovate, unequal, 6–9 × 2–3 mm, apex acute to acuminate; petals yellow, obovate or oblong-obovate, (10–)12–15 mm; stamens 40–80(–100); anther gland amber; styles 6–9 mm. Capsules ovoid, 6–9 × 4–4.5 mm, with longitudinal vittae. Seeds not carinate, 1 mm; testa minutely and shallowly pitted. 2n = 16.
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