Herbs, perennial, procumbent. Stems 4-angled, sparsely scaberulous. Leaves on main stems in whorls of up to 6, sessile; blade drying ?papery, oblanceolate or narrowly obovate-oblong, (4-)10-20(-31) × (1-)2-4 mm, glabrous and smooth adaxially, glabrous or hairy and retrorsely aculeolate along midrib abaxially and along margins, base acute to cuneate, apex acute or acuminate; vein 1. Inflorescences with terminal and axillary, few-to several-flowered, usually regularly trichotomous cymes; bracts linear, ca. 2 mm; pedicels slender, 3-5 mm. Ovary ovoid, ca. 0.7 mm, glabrous. Corolla ?white, rotate, 2-2.5 mm in diam., lobed for 2/3 or more; lobes 4, ovate, obtuse. Mericarps ellipsoid, ca. 2 mm, glabrous. Fl. May-Jul, fr. Jul.
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