23, 2nd 7 15
24, 3rd 5 0 (about)

In the foregoing Table, which includes twining plants belonging to
widely different orders, we see that the rate at which growth travels
or circulates round the axis (on which the revolving movement
depends), differs much. As long as a plant remains under the same
conditions, the rate is often remarkably uniform, as with the Hop,
Mikania, Phaseolus, &c. The Scyphanthus made one revolution in 1 hr.
17 m., and this is the quickest rate observed by me; but we shall
hereafter see a tendril-bearing Passiflora revolving more rapidly. A
shoot of the Akebia quinata made a revolution in 1 hr. 30 m., and
three revolutions at the average rate of 1 hr. 38 m.; a Convolvulus
made two revolutions at the average of 1 hr. 42 m., and Phaseolus
vulgaris three at the average of 1 hr. 57 m. On the other hand, some
plants take 24 hrs. for a single revolution, and the Adhadota
sometimes required 48 hrs.; yet this latter plant is an efficient
twiner. Species of the same genus move at different rates. The rate
does not seem governed by the thickness of the shoots: those of the
Sollya are as thin and flexible as string, but move more slowly than
the thick and fleshy shoots of the Ruscus, which seem little fitted
for movement of any kind. The shoots of the Wistaria, which become
woody, move faster than those of the herbaceous Ipomoea or
Thunbergia.

We know that the internodes, whilst still very young, do not acquire
their proper rate of movement; hence the several shoots on the same
plant may sometimes be seen revolving at different rates. The two or
three, or even more, internodes which are first formed above the
cotyledons, or above the root-stock of a perennial plant, do not