HABIT	AN ERECT, PUBESCENT OR HISPIDLY HAIRY ANNUAL HERB UP TO 50 CM TALL.
STEMS	GROOVED WITH QUADRANGULAR BRANCHES.
LEAVES	OPPOSITE, 2.5-7.5 CM LONG AND 0.8-1.3 CM WIDE; LINEAR OR LINEAR-LANCEOLATE, APEX OBTUSE, MARGINS ENTIRE OR SLIGHTLY SERRATE, OFTEN SLIGHLY RECURVED, HISPID ON BOTH SIDES, BASE TAPERING.
FLOWERS	WHITE, SESSILE OR NEARLY SO, BORN IN TEMINAL WHORLS, 1.3-2 CM IN DIAMETER
FRUITS	NUTELETS SMALL, OBOVOID-OBLONG, DARK BROWN OR BLACK, SHINING.