Xerophyte

A Xerophyte is a species of plant that has adapted to survive in an environment with little liquid water, such as an arid desert or an ice- or snow-covered region in the Alpine tundra. Xerophytes have adapted to be able to survive in these conditions, which are extreme for most plants.

Characteristics

Xerophytes have a number of adaptations that enable them to survive in dry environments. These include:

• Stomata that can open to allow air in and close to prevent water loss.
• Cuticles that are thick and waxy to reduce water loss.
• Leaf size and shape that reduces the surface area exposed to the air, reducing water loss.
• Root systems that are extensive and can reach deep into the soil to access water.
• Succulence, or the ability to store water in their leaves, stems, and roots.

Types of Xerophytes

There are several types of xerophytes, including:

• Ephemerals, which complete their life cycle during periods of available moisture, and survive dry periods as seeds.
• Succulents, which store water in their leaves, stems, and/or roots.
• Non-succulent perennials, which have adaptations such as small leaves and deep roots to survive dry periods.
• Shrubs and trees, which have deep root systems and thick bark to reduce water loss.

Examples of Xerophytes

Some examples of xerophytes include:

• The cactus family, which includes many succulent xerophytes.
• The Aloe genus, which includes many succulent xerophytes.
• The Agave genus, which includes many succulent xerophytes.
• The Joshua tree, a non-succulent perennial xerophyte.

See also

• Hydrophyte
• Mesophyte
• Halophyte

References

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