The order Doassansiales is a group of fungi within the class Exobasidiomycetes, primarily known for being plant pathogens. Members of this order are mostly smut fungi that infect aquatic or semi-aquatic plants, especially those in wetland environments. They have a specialized life cycle that often includes both saprobic and parasitic stages, producing spores that facilitate dispersal in water. Morphologically, they are characterized by teliospores that are typically formed on host tissues, sometimes causing visible smut-like galls or lesions. Doassansiales are ecologically significant for their role in regulating host plant populations and contributing to wetland ecosystem dynamics, and they are studied for their unique adaptations to aquatic habitats.