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The Collaborative International Dictionary
Telegraph plant

Telegraph plant \Telegraph plant\ (Bot.), A tick trefoil ( Meibomia gyrans formerly Desmodium gyrans), native of the East Indies; it is a leguminous plant whose lateral leaflets jerk up and down like the arms of a semaphore, and also rotate on their axes.

Wiktionary
telegraph plant

n. ''Codariocalyx motorius'', a tropical Asian shrub, one of the few plants capable of rapid movement.

WordNet
telegraph plant

n. erect tropical Asian shrub whose small lateral leaflets rotate on their axes and jerk up and down under the influence of sunshine [syn: semaphore plant, Codariocalyx motorius, Desmodium motorium, Desmodium gyrans]