How are Casuarinaceae plants adapted to dry habitats?

Plants in the Casuarinaceae family are well-adapted to dry habitats, such as coastal strands and poor soils, through several specialized structural features:

• Reduced Leaves: The plants possess tiny, scalelike leaves arranged in whorls along their branches, which minimizes the surface area available for water loss.1
• Grooved Branches: The slender, green branches are deeply grooved, providing a protected environment for the plant's stomates (microscopic pores).1
• Protective Hairs: Long plant hairs protrude from these grooves, acting as a protective barrier for the stomates located along the side walls. This structure helps shield the pores from direct contact with dry air, thereby reducing transpiration.1

These adaptations allow the trees and shrubs of this family to thrive in environments where water conservation is critical.1