Twining

Definition and stakes

Portrait of Charles Darwin Charles Darwin,  The Movements and Habits of Climbing Plants

“ I have seen no instance of two species of the same genus twining in opposite directions, and such cases must be rare; but Fritz Müller [33] states that although Mikania scandens twines, as I have described, from left to right, another species in South Brazil twines in an opposite direction. It would have been an anomalous circumstance if no such cases had occurred, for different individuals of the same species, namely, of Solanum dulcamara (Dutrochet, tom. xix. p. 299) , revolve and twine in two directions: this plant, however; is a most feeble twiner. ”
Source: Gutenberg

Portrait of Charles Darwin Charles Darwin,  On the movements and habits of climbing plants (1865)

“ Some, but very few, tendril-bearing plants can spirally twine up an upright stick. Although the twining-power has generally been lost by tendril-bearers, either from the stiffness or shortness of the internodes, from the size of the leaves, or from other unknown causes, the revolving movement well serves to bring the tendrils into contact with surrounding objects. ”
Source: Wikisource

Portrait of Charles Darwin Charles Darwin,  The Movements and Habits of Climbing Plants

“ If we hold in our left hand a bundle of parallel strings, we can with our right hand turn these round and round, thus imitating the revolving movement of a twining plant, and the strings do not become twisted. But if we hold at the same time a stick in our left hand, in such a position that the strings become spirally turned round it, they will inevitably become twisted. ”
Source: Gutenberg

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