Clavicipitaceae is a family of fungi known for its parasitic and symbiotic relationships with plants, particularly grasses. This family includes various genera, such as Claviceps, which is famous for producing ergot, a compound that can be toxic to humans and animals. These fungi typically grow on the seeds of their host plants, affecting their development and health. Members of the Clavicipitaceae family play significant roles in ecosystems, influencing plant populations and interactions. Some species are used in traditional medicine, while others are studied for their potential applications in agriculture and biotechnology. Understanding these fungi helps researchers explore their ecological and economic impacts.