Habit : An erect annual tall herb, simple or dichotomously branched with stems and branches dark-green, glabrous or sparsely pubescent, young branches nearly quadrangular.
Leaves : Ovate or elliptic, membranous darkgreen, glabrous or sparsely hairy, deeply impressed between the nerves , apex obtuse, base decurrent into petiole, margins sharply serrate, petiolate.
Inflorescence : Terminal spikes.
Flowers :
Deep-blue, sessile, glabrous, slender, nearly continuous, rachis dark-green, bracteates, bracts lanceolate, acuminate with a long acumen and scarious margins.