Stems very slender, three to eight inches long, branching from the base, spreading, procumbent, with smaller branches ascending. Leaves broadly ovate, obtuse at tips, rounded or heart-shaped at base, scallop-toothed, the lower ones opposite and petioled, the upper ones alternate and sessile; the whole plant clothed with fine, soft hair. Flowers axillary and single, on very slender, hairy peduncles longer than the leaves; calyx-lobes hairy and larger than the corolla, which is pale blue and about a quarter-inch broad. Capsule heart-shaped, thickened, much broader than long, few-seeded.
Means of control the same as for Purslane Speedwell.