Spirogyra belongs to the kingdom Plantae.
This green algae is a filamentous species that thrives in freshwater environments. Being part of the Plantae kingdom, spirogyra plays a significant role in aquatic ecosystems, contributing to the production of oxygen and serving as a food source for various organisms. Its defining characteristic is its spiral arrangement of chloroplasts, which gives it a distinctive appearance under the microscope. Thus, understanding its classification is crucial in studying biodiversity and ecological balance in freshwater habitats.