HABIT	AN ERECT, SPREADING, BRANCHED, ANNUAL HERB.
STEMS	ABOUT 50 CENTIMETERS IN HEIGHT, WITH HAIRS SPRINGING FROM TUBERCLES.
LEAVES	STALKLESS, OPPOSITE, LANCEOLATE, 2 TO 8 CENTIMETERS LONG, POINTED AT THE TIP, AND HEARTSHAPED AT THE BASE.
FLOWERS	THE FLOWERS OCCUR SINGLY IN THE AXILS OF THE LEAVES. THE FLOWER TUBE IS PALE BLUE, WITH THE LIMB ABOUT 1.5 CENTIMETERS IN DIAMETER, AND THE PETALS POINTED.
FRUITS	THE FRUIT IS ELLIPSOID, AND IS ENCLOSED BY THE CALYX.
SEEDS	THE NUTLETS 4, ABOUT 5 MM LONG, AND ROUGH ON THE INNER SURFACE, SMOOTH AND POLISHED ON THE BACK; GREYISH WHITE.