HABIT
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AN ERECT, CAMPHOR-SCENTED,
VARIABLE HERB OR WOODY SHRUB, UP TO 2 M TALL.
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STEMS
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QUADRANGULAR AND SOFTY PUBESCENT.
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LEAVES
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THICK, BROADLY OVATE, 4-10 CM
LONG AND 2-6 CM WIDE, BASE ROUNDED OR SUBCORDATE, APEX ACUTE, MARGINS
CRENATE-SERRATE, HAIRY TO SOFTY PUBESCENT ON BOTH SIDES; PETIOLES 1-7.5 CM
LONG.
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FLOWERS
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FLOWERS BORNE IN DENSE WHORLS
IN LEAF AXILS BELOW AND IN DENSE, SPIKED INFLORESCENCES, 8-32 CM LONG ABOVE;
LIGHT PURPLE OR DARK RED WITH A DEEP BLUE LOWER LIP.
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FRUITS
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NUTLETS 2.5 MM LONG, BROADLY
OVOID WITH ROUNDED ENDS, SMOOTH, POLISHED, TURNING BLACK WHEN RIPE.
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