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Venus flytrap

life science Maturity 7-9 Next article →

The Venus flytrap, known scientifically as *Dionaea muscipula*, is a unique carnivorous plant.

Drawing of Venus Flytrap
Drawing of Venus Flytrap

It is the only species within its genus, *Dionaea*. This plant is a member of the Droseraceae family. This family also includes the waterwheel plant and the sundews. Most Venus flytraps are native to specific wetlands in North and South Carolina.

Venus flytrap Map
Venus flytrap Map

They live in habitats like bogs, wet savannahs, and canebrakes. These environments are very low in nitrogen and phosphorus. Because the soil lacks these essential nutrients, the plant must find them elsewhere. It uses its specialized leaves to capture animals for nutrition.

The trapping mechanism of the Venus flytrap is highly sophisticated.

Dionaea muscipula closing trap animation
Dionaea muscipula closing trap animation

The leaf blade is divided into two distinct regions. First, there is a flat, heart-shaped petiole used for photosynthesis. Second, there are two terminal lobes that act as the actual trap. These lobes are hinged at the midrib and form a jaw-like structure. The inner surface of these lobes contains tiny, hair-like structures called trichomes. These are commonly known as trigger hairs or sensitive hairs.

Dionaea-muscipula-Ausloeseborste-Mikroskopaufnahme
Dionaea-muscipula-Ausloeseborste-Mikroskopaufnahme

When an insect or spider touches these hairs, the plant begins a rapid response.

To prevent wasting energy, the plant uses a specific counting mechanism.

Snap, Digest, Absorb - How the Venus flytrap processes prey 01
Snap, Digest, Absorb - How the Venus flytrap processes prey 01

If a prey item touches one trigger hair, the trap prepares to close. However, the lobes will only fully snap shut if a second hair is contacted within approximately twenty seconds. One hair touched twice in rapid succession can also trigger the closure. This safeguard ensures the plant does not waste energy on non-nutritional items like raindrops. The snap itself is incredibly fast, occurring in about one-tenth of a second. Once the prey is caught, the plant requires five more stimuli to begin full digestion. This ensures the captured animal is large enough to be worth the effort.

The physical structure of the plant varies based on its environment.

Dionaea muscipula akai ryu
Dionaea muscipula akai ryu

The plant grows from a short, bulb-like subterranean stem. This stem usually reaches a height of three to ten centimeters. There are four major forms of the plant: 'typica', 'erecta', 'linearis', and 'filiformis'. The 'typica' form is the most common and has broad petioles. The 'erecta' and 'linearis' forms have leaves that grow at a 45-degree angle. The 'filiformis' form is unique because it has extremely narrow, linear petioles. Many of these shapes change depending on the season or the amount of light available.

European discovery of the plant began in the mid-1700s.

In 1759, North Carolina Governor Arthur Dobbs wrote the first description of the plant. He sent a letter to botanist Peter Collinson describing a "Catch Fly Sensitive." Later, in 1768, botanist John Ellis provided the scientific name *Dionaea muscipula*. The genus name refers to the Greek goddess Aphrodite. The species name *muscipula* is Latin for mousetrap or flytrap. Some historical records also mention the name "tipitiwitchet." This term may have come from the Renape word *titipiwitshik*, meaning leaves that wind around prey.

The diet of the Venus flytrap is quite specific.

Dionaea, muscoid fly
Dionaea, muscoid fly

It primarily eats crawling arthropods rather than flying insects. Analysis shows that its diet is 33% ants and 30% spiders. Beetles and grasshoppers make up about 10% each. Flying insects account for less than 5% of what it consumes. The edges of the trap are lined with stiff, hair-like protrusions called cilia. These cilia mesh together to prevent large prey from escaping. However, the meshwork has small holes that allow tiny prey to pass through. The plant ignores these small insects because the energy cost of digestion would outweigh the nutritional benefit.

Despite its fame, the wild population of the Venus flytrap is in danger.

Venus flytrap Map
Venus flytrap Map

The plant relies on periodic forest fires to thrive. These fires clear away competing vegetation and keep the canopy open. The plant's trigger hairs even act as heat sensors to help it survive these fires. In the wild, the population has declined drastically. A 1979 estimate placed the population at 4,500,000 individuals. By 2019, a survey estimated only about 302,000 plants remained in the wild. This represents a massive reduction of more than 93% in just forty years.

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🖼️ Images & Media (10)
File:Drawing of Venus Flytrap.jpg
Drawing of Venus Flytrap.jpg
File:Venus flytrap Map.gif
Venus flytrap Map.gif
File:Dionaea muscipula closing trap animation.gif
Dionaea muscipula closing trap animation.gif
Venus Flytrap time lapse.webm
File:Snap, Digest, Absorb - How the Venus flytrap processes prey 01.png
Snap, Digest, Absorb - How the Venus...
File:Dionaea-muscipula-Ausloeseborste-Mikroskopaufnahme.jpg
Dionaea-muscipula-Ausloeseborste-Mikroskop...
File:Dionaea, muscoid fly.jpg
Dionaea, muscoid fly.jpg
File:Dionaea Paria beetle.jpg
Dionaea Paria beetle.jpg
File:Drosera falconeri Darwiniana.jpg
Drosera falconeri Darwiniana.jpg
File:Dionaea muscipula akai ryu.jpg
Dionaea muscipula akai ryu.jpg
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