कृष्णनील (Anagallis arvensis L.)
Common Name : Scarlet pimpernel Family : Primulaceae Habit : A low-growing annual, up to 30 cm tall. Stem : Branching, decumbent, repent, or erect, herbaceous, 4-angled, glabrous to pubescent, sometimes rooting at the nodes. Leaves : Opposite, entire, sessile, ovate, to 2 cm long, 1.3 cm broad, clasping or not, with brown speckles below, variously pubescent, margins some what tuberculate. Flowers : Solitary flowers arise from the area between the stem and leaves (leaf axils) and occur on relatively long stalks (pedicels); bright blue. Fruits : Capsule, globose. Seeds : 1.3 mm long, trigonous, brown.