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But in ascending the series from simple twiners to leaf-climbers, an important quality is added, namely sensitiveness to a touch, by which means the foot-stalks of the leaves or flowers, or these modified and converted into tendrils, are excited to bend round and clasp the touching object.
With respect to the sensitiveness of the foot-stalks of the leaves and flowers, and of tendrils, nearly the same remarks are applicable as in the case of the revolving movements of twining plants. As a vast number of species, belonging to widely distinct groups, are endowed with this kind of sensitiveness, it ought to be found in a nascent condition in many plants which have not become climbers.
The leaves have long foot-stalks, the flowers are small and yellow, and the capsules short and globose, containing five cells for the seed. The fruit ripens in September and October. The average yield in fibre to the acre is from four hundred to seven hundred pounds.
"It must be added that many leaves are furnished with muscles about their foot-stalks, to turn their surfaces to the air or light, as mimosa or Hedysarum gyrans. From all these analogies I think there can be no doubt but that leaves of trees are their lungs, giving out a phlogistic material to the atmosphere, and absorbing oxygen, or vital air.
Bryant in his Flora Diaetetica says that the bottoms of the flowers are eaten as artichokes. COW-PARSNEP. Heracleum Sphondylium. The inhabitants of Kamschatka about the beginning of July collect the foot-stalks of the radical leaves of this plant, and, after peeling off the rind, dry them separately in the sun; and then tying them in bundles, they lay them up carefully in the shade.
An example is furnished by those blind crabs named in the Origin of Species which inhabit certain dark caves of Kentucky, and which, though they have lost their eyes, have not lost the foot-stalks which carried their eyes. In describing the varieties which have been produced by pigeon-fanciers, Mr.
It is a more important fact that according to the high authority of Hofmeister, the young shoots and leaves of all plants move after being shaken; and with climbing plants it is, as we know, only during the early stages of growth that the foot-stalks and tendrils are sensitive.
We are thus led to conclude, that with pine-leaves there must be something attractive to worms in the base, notwithstanding that few ordinary leaves are drawn in by the base or foot-stalk. Petioles. We will now turn to the petioles or foot-stalks of compound leaves, after the leaflets have fallen off.
This is the case: I observed that the young flower-peduncles of the above Maurandia curved themselves a little towards the side which was touched. Morren found in several species of Oxalis that the leaves and their foot-stalks moved, especially after exposure to a hot sun, when they were gently and repeatedly touched, or when the plant was shaken.
As soon as we touched the shore the men rushed forward to meet us, and to shake hands, and, having left the muskets and revolvers judiciously out of sight in the boat, we were conducted to a cluster of huts, made of branches, or rather leaves, of the palm-tree, tied by their foot-stalks across two poles, and hanging down to the ground.
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