Subshrubs, perennial, erect or ascending, sometimes caespitose, 5-40 cm tall. Rootstock stout, woody. Stems 4-angled, very shortly pilose at base, glabrous and smooth above. Leaves in whorls of 5-8, drying blackish, linear to linear-oblanceolate, 12-27 × 1-2 mm, glabrous or sparsely ciliolate toward acute apex; vein 1. Inflorescences terminal on main and short lateral branches, cymose to corymbiform, lax, few to several flowered; axes glabrous and smooth; bracts reduced or none; pedicels 1-4 mm. Ovary ovoid, ca. 1.5 mm, glabrous. Corolla white, cup-shaped to subrotate, 3.5-5 mm in diam., glabrous; lobes 4, lanceolate-oblong, slightly mucronulate. Fruit usually from 1 mericarp only, subglobose, 3-3.5 mm in diam., glabrous, smooth, white, with pericarp inflated, spongy to ± fleshy. Fl. Jun-Jul, fr. Jul-Aug.
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