Name two examples of heterosporous pteridophytes.

• Salvinia
• Azolla

Heterosporous pteridophytes are plants that produce two types of spores: microspores and megaspores. Here are two examples:

Salvinia

Salvinia is a floating aquatic fern known for its unique reproductive strategy. It produces both microspores and megaspores, allowing it to thrive in various water environments.

Azolla

Azolla is another aquatic fern that exhibits heterospory. It often grows in rice paddies and has a symbiotic relationship with nitrogen-fixing cyanobacteria, enhancing soil fertility.

Key Characteristics

• Both are aquatic ferns.
• They play important roles in their ecosystems.
• They contribute to nitrogen fixation and soil health.