Mimosa invisa C. Mart.
Common Name : Giant sensitive plant
Family : Fabaceae

HABIT |
A FAST GROWING, ABUNDANTLY THORNY, BIENNIAL OR PERENNIAL SHRUB. |
STEMS |
BUNCHING, OFTEN SCRAMBLING OVER OTHER PLANTS, FOUR-ANGLED, THE ANGLES USUALLY WITH A LINE OF SHARP, HOOKED PRICKLES. |
LEAVES |
ALTERNATE, BRIGHT GREEN, FEATHERY AND FERN-LIKE, EACH LEAF DIVIDED INTO FIVE TO SEVEN PAIRS OF SEGMENTS. EACH SEGMENT CARRIES ABOUT TWENTY PAIRS OF VERY SMALL LEAFLETS WHICH CLOSE UP WHEN DISTURBED, INJURED, OR AT NIGHTFALL. |
FLOWERS |
VERY SMALL PALE PINK FLOWERS OCCUR AS ROUND, FLUFFY BALLS, ABOUT 12 MM ACROSS, ON SHORT STALKS IN THE LEAF JOINTS. |
FRUITS |
PODS ARE CLUSTERED, EACH ABOUT 25 MM LONG AND 6 MM BROAD WHEN RIPE. CLOTHED WITH SMALL PRICKLES, THESE LATER BREAK INTO FOUR OR FIVE ONESEEDED PIECES. |
SEEDS |
2-3.5 MM LONG; FLATTENED OVATE; YELLOW-BROWN; GLOSSY; THERE IS HORSESHOE SHAPED RING ON EACH FACE. |