telegraph plant

telegraph plant

noun
a tick trefoil, Desmodium motorium, of the legume family, native to tropical Asia, noted for the spontaneous, jerking, signallike motions of its leaflets.

Origin:
1880–85

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World English Dictionary
telegraph plant
 
n
a small tropical Asian leguminous shrub, Desmodium gyrans, having small leaflets that turn in various directions during the day and droop at night

Collins English Dictionary - Complete & Unabridged 10th Edition
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