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(of a leaf) having its base folded and partly enclosing the leaf next above it, as in an iris.‘The leaves in the genus Iris are equitant that is they are 2-ranked and folded in half lengthwise.’‘Most Nartheciaceae can be recognised by their isobifacial, equitant leaves.’
Late 18th century from Latin equitant- ‘riding on horseback’, from the verb equitare.
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