50 m.; but when grown older with the tendrils mature, it made
two ellipses, each at the rate of 2 hrs. 44 m. This species, unlike
the preceding, is incapable of twining round a stick: this does not
appear to be due to any want of flexibility in the internodes or to
the action of the tendrils, and certainly not to any want of the
revolving power; nor can I account for the fact. Nevertheless the
plant readily ascends a thin upright stick by seizing a point above
with its two opposite tendrils, which then contract spirally. If the
tendrils seize nothing, they do not become spiral.
The species last described, ascended a vertical stick by twining
spirally and by seizing it alternately with its opposite tendrils,
like a sailor pulling himself up a rope, hand over hand; the present
species pulls itself up, like a sailor seizing with both hands
together a rope above his head.
The tendrils are similar in structure to those of the last species.
They continue growing for some time, even after they have clasped an
object. When fully grown, though borne by a young plant, they are 9
inches in length. The three divergent toes are shorter relatively to
the tarsus than in the former species; they are blunt at their tips
and but slightly hooked; they are not quite equal in length, the
middle one being rather longer than the others.
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