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1 The Trapa natans of Linnæus, or water chesnut, a prickly marsh plant of Europe and Asia. Hence our word "caltrop."
2 "Dira res alibi."
3 These two plants have no affinity whatever with the one just mentioned. The first of these so-called varieties is the Tribulus terrestris of Linnæus; and the second is identified by Fée, though with some doubt, with the Fagonia Cretica of Linnæus.
4 The Ononis antiquorum of Linnæus, the Cammock, or rest-harrow.
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