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Updated: June 18, 2025
Hooker, although incomplete, wellnigh demonstrate that these not only allure insects by a sweet secretion at the rim and upon the lid of the cup, but also that their capture, or the presence of other partly soluble animal matter, produces an increase and an acidulation of the contained watery liquid, which thereupon becomes capable of acting in the manner of that of Drosera and Dionaea, dissolving flesh, albumen, and the like.
And the Dionaea, or Venus's Fly-trap of the Southern States, has some leaves which fold together upon any insect that alights upon their upper surface; and by means of a row of long spines that fringes the leaves, they prevent his escape. The more active the struggles of the captive, the closer grows the hold of the leaf, and speedily destroys him.
Darwin has written a well-known work on the movements of climbing plants. He studied also the contrivances of certain insectivorous plants, such as the Drosera and the Dionaea, to seize their prey. The leaf-movements of the acacia, the sensitive plant, etc., are well known.
These, as we have heard, may before long be reprinted in a volume, and supplemented by some long-pending but still unfinished investigations upon the action of Dionaea and Drosera a capital subject for Mr. Darwin's handling.
Perhaps the nearest analogy may be found in such plants as Drosera and Dionaea; for here animal matter is digested and converted into peptone not within a stomach, but on the surfaces of the leaves. Calciferous Glands. But almost as many theories have been advanced on their use as there have been observers.
Why is the dental formula of the viverrinae different? What purpose has the long spur in the flower of Angraecum, or the marvellous bucket of Coryanthes, the flytrap of Dionaea, the pitcher of Nepenthes? What is the cause, what is the purpose, what is the plan in the scheme of nature, of these structures?
Only a brief chapter is devoted to Dionaea of North Carolina, the Venus's fly-trap, albeit, "from the rapidity and force of its movements, one of the most wonderful in the world."
But it has recently been found that the bladder is composed of two lobes, like the trap of its relative Dionaea, or the valves of a mussel-shell; that these open when the plant is in an active state, are provided with some sensitive bristles within, and when these are touched close with a quick movement.
Roth, a keen German botanist of the eighteenth century, was the first to detect, or at least to record, some evidence of intention in Drosera, and to compare its action with that of Dionaea, which, through Ellis's account, had shortly before been made known in Europe. For Roth surmised that both these plants were, in their way, predaceous.
That most expert of fly-catchers, Dionaea, of which so much has been written and so little known until lately, came very near revealing its secret to Solander and Ellis a hundred years ago, and doubtless to John Bartram, our botanical pioneer, its C probable discoverer, who sent it to Europe.
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