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Buds will be developed in the axils of the nearest leaves, and it will be shown that each is a compound leaf with two appendages at its base, called stipules, and with a tendril at its apex.
When a tendril has caught a yielding object, this is sometimes enveloped and still further secured by the spiral folds, as I have seen with Passiflora quadrangularis; but this action is of little importance. A far more important service rendered by the spiral contraction of the tendrils is that they are thus made highly elastic.
It is stated by that observer, "that a thread weighing no more than the thirty-second of a grain, if placed on the tendril of the Passiflora gracilis, will cause it to bend; and merely to touch the tendril with a twig causes it to bend; but if the twig is at once removed, the tendril soon straightens itself.
When a tendril has not succeeded in clasping a support, either through its own revolving movement or that of the shoot, or by turning towards any object which intercepts the light, it bends vertically downwards and then towards its own stem, which it seizes together with the supporting stick, if there be one. A little aid is thus given in keeping the stem secure.
After their development the tendrils contract spirally, and become woody and very strong. A tendril in this state supported nearly seven ounces, and would apparently have supported a considerably greater weight, had not the fibres of flax to which the discs were attached yielded.
I hooked a tendril on to a twig; and in 1 hr. 45 m. it was curved considerably inwards; in 2 hrs. 30 m. it formed a ring; and in from 5 to 6 hours from being first hooked, it closely grasped the stick. A second tendril acted at nearly the same rate; but I observed one that took 24 hours before it curled twice round a thin twig.
He bent his head close to hers, conscious of a caressing tendril of hair that touched his cheek, and the sweet warmth and fragrance of her; and peering through the draperies saw their pursuing motor car at pause, not at the curb, but in the middle of the street before the house. The man's arm still rested on the sill of the window; the pale oval of the face above it was still vague.
Such cases never really occur; for, as already stated, when a tendril has caught a support and is spirally contracted, there are always as many turns in one direction as in the other; so that the twisting of the axis in the one direction is exactly compensated by the twisting in the opposite direction.
There, where Hannibal defeated Flaminius, the grape vines clung to each other with the friendly grasp of their green tendril fingers; while, by the wayside, lovely half-naked children were watching a herd of coal-black swine under the blossoms of fragrant laurel. Could we rightly describe this picturesque scene, our readers would exclaim, "Delightful Italy!"
They paused momentarily by a vine-covered wall and he felt a cool frond reach out to caress his shoulder while a long tendril curled gracefully about his forearm between the upper and the lower wrists.
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