WordNet sense 1 (North American annual plant with usually yellow or orange flowers; grows chiefly on wet rather acid soil):

celandine, jewelweed, lady's earrings, orange balsam

WordNet sense 2 (Mediterranean vine having oblong fruit that when ripe expels its seeds and juice violently when touched):

squirting cucumber, exploding cucumber

WordNet sense 3 (prostrate or semi-erect subshrub of tropical America, and Australia; heavily armed with recurved thorns and having sensitive soft grey-green leaflets that fold and droop at night or when touched or cooled):

live-and-die, action plant, humble plant, shame plant, sensitive plant