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In Zanonia Indica, which belongs to a different tribe of the family, the forked tendrils and the internodes revolve in periods between 2 hrs. 8 m. and 3 hrs. 35 m., moving against the sun. VITACEAE. In this family and in the two following, namely, the Sapindaceae and Passifloraceae, the tendrils are modified flower- peduncles; and are therefore axial in their nature.
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