Lax-stemmed herb, often rooting at nodes and finally ascending, forming dense masses. Bracts naviculate, 1.7-3 cm long, > acute or long acuminate. Corolla blue. Corolla lateral petals (2) with ovate-cordate limb 4-5 mm x 4-5 mm; claw < limb; third petal 3-4 mm long, remaining folded (involute). Filaments and style blue. Abundant in many inland disturbed sites.