Plants strongly perennial with branched, woody base, stout, 11-30 cm, stipitate-glandular in inflorescence or throughout. Taproots becoming stout, woody. Stems erect to ascending, often arcuately so, much-branched proximally; main stem 0.4-1.3 mm diam. proximally. Leaves: stipules ± conspicuous, dull white, broadly lance-acuminate, 3-8 mm, apex mucronate; blade filiform to linear, 1-4.2 cm, somewhat fleshy, apex apiculate or spine-tipped; axillary leaves 2-4 per cluster. Cymes simple to 3-compound. Pedicels spreading to reflexed in fruit. Flowers: sepals connate 0.5-0.7 mm proximally, lobes 1-or 3-veined, lance-ovate to lanceolate, 2.5-4 mm, to 5 mm in fruit, margins 0.1-0.6 mm wide, apex acute to acuminate but often briefly rounded at tip; petals white, ± elliptic, 0.7-0.8 times as long as sepal; stamens 7-10; styles 0.4-0.6 mm. Capsules greenish to tan, (4-)5-6.5 mm, 1.1-1.3 times as long as sepals. Seeds reddish brown to dark brown, often with submarginal groove, broadly ovate, plump, 0.4-0.5 mm, smooth, often sculptured with parallel, wavy lines, papillae often present; wing often present, white, 0.1-0.2 mm wide, margins irregular.
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Herb, perennial, with thick, woody rootstock. Branches usually decumbent from base. Leaves prominently caudate, 10–2 long, 0.4–0.8 mm wide, mostly uniformly glandular-hairy. Stipules, long-acuminate, sometimes furcate, (4–) 6–8 mm long, shortly connate. Inflorescence many-flowered, lax, with dense glandular hairs 0.15–0.35 (–0.5) mm long. Pedicels 3–12 mm long, equalling or up to three times the length of sepals. Sepals lanceolate, 3–4 (–5) mm long (mostly 4–5.5 mm long in fruit); basal spots absent. Petals 3–4 mm long, white. Stamens (3–)8–10. Capsules narrowly ovoid, 5–7 mm long, 1–1.5 (–2) mm longer than sepals. Seeds broadly and obliquely pyriform, 0.4–0.6 mm long, red-brown to dark brown, smooth to obscurely papillose, scariously winged (wing often vestigial or occasionally absent), with wing margin erose-denticulate.
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