Annual; possibly stoloniferous; glabrous (or nearly so); leaves 1-6 cm long, 3-5 mm wide, the elongated petioles widening to oblanceolate, entire, slightly fleshy blades; flowers on slender peduncles; calyx 3-3.5 mm long, glabrous, the lobes ovate-acute, about 1 mm long; corolla whitish, 2.5 mm long, throat tubular-campanulate, lobes about 0.8 mm long, obtuse, finely pubescent within; style 0.6 mm long, curved; stigma capitate; capsule 2-celled, 3.5-4 mm long, globose-ovoid; seeds many, cross-ribbed, 0.4 mm long, little longer than wide, grayish-brown, the ridges sharp. Flowers May to July.