Herb, very small or to 1 m tall, branched, essentially glabrous; stems 6-ribbed. Petioles obscure; blades oblanceolate, acute at apex, narrowly tapered to base, to 3.5 cm long and 1.2 cm wide, densely punctate, crenate; major veins usually 2 or 3 on each side. Flowers solitary or clustered in leaf axils, 4-parted, 4-5 mm wide; pedicels slender, 4-6 mm long; sepals ovate, rounded at apex, 3-veined, ciliate, ca 1.3 mm long; corolla deeply lobed, to 2.7 mm long, densely pilose inside at base, the lobes rounded at apex, white or tinged with lavender; stamens 4, exserted, ca 2 mm long; anthers as broad as long, dehiscing upward; ovary ovoid, glabrous; style to 2.7 mm long, simple, longer than ovary. Capsules ovoid, 2-valved; seeds numerous, minute, irregularly ovoid, reticulate. Croat 4160.