Tuesday, December 9, 2008

Carnivorous Plants

If you want to add a unique touch to your garden, carnivorous plants are bound to get attention. There are several interesting exotic species to consider, such as the ever popular Venus Flytrap or the Cobra plant. In areas that have high populations of bugs, they can lowers the amount of flies or other insects that bother you. While the benefit is strictly related to the size and type of carnivorous plants that you own, these plants can provide a small level of relief while providing entertainment to adults and children alike.

There are five different types of carnivorous plants. The most common type, is the Venus Flytrap found in cultivated varieties of the Dionaea muscipula family. Snap traps rely on a mouth that close in around its pray, where the plant will eat whatever it catches.

When a fly or insect walks on the surface, this activates a hair trigger and causes closure, as the traps closes it fills with an enzyme solution, and then it will dissolve the proteins from the insect. These traps rely on prey falling into the plant and them being unable to escape.

These plants range from colorful to bland, and do not have moving parts like their snap trap counterparts.

Sundew plants of the Venus Flytrap family are amongst the most interesting to watch. They are covered with dense, gland-tipped hairs and several tiny midge flies are stuck to the sticky hairs, which causes the insect to be enzymatically digested and absorbed by the plant. The type of secretion created by this particular plant can cause skin irritation to humans and therefore should be treated with caution.

The only carnivorous plant with a true "trapdoor" is the remarkable bladderwort. Numerous, tiny glands inside the bladder absorb most of the internal water and expel it on the outside, and as a result, a partial vacuum is produced inside the bladder and the pressure on the outside becomes greater than the inside. This causes the walls to squeeze inward and explains their slightly concave appearance. Unlike many carnivorous plant species, these are more commonly found underwater than above ground.

Another favorite carnivorous plant are the lobster-pot traps, and they come with a chamber that is easy to enter, and whose exit is either difficult to find or obstructed by inward-pointing bristles.

Corkscrew plants are interesting, in that, the inside of the plant mouth is filled with downward pointing obstructions, used to prevent it’s prey from escaping it’s grasp.

For those interested in borderline species, there are several varieties of plants that do not meet all of the requirements of carnivorous plants, but have sharing characteristics. Some of these type of plants come from the Martyniaceae family, such as the Brocchinia Roridula. They are not considered to be in the same classification as true carnivorous plants because they do not, attract, kill and digest prey.

If you decided to plant or house any type of carnivorous plant, you will need to be sure to keep them out of reach from children. Even though they are considered relatively harmless to humans, the type of digestive enzymes they produce to break down their captured prey, should be avoided.

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