touch-me-not

(noun) North American annual plant with usually yellow or orange flowers; grows chiefly on wet rather acid soil. Synonyms: jewelweed, lady's earrings, orange balsam, celandine, Impatiens capensis.

(noun) Mediterranean vine having oblong fruit that when ripe expels its seeds and juice violently when touched. Synonyms: squirting cucumber, exploding cucumber, Ecballium elaterium.

(noun) 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. Synonyms: sensitive plant, shame plant, live-and-die, humble plant, action plant, Mimosa pudica.