Carex acutiformis, commonly known as the acute sedge, is a perennial grass-like plant that typically grows in wetland areas. It belongs to the family Cyperaceae. There are several synonyms for Carex acutiformis, including Carex intermedia, Carex rostrata, and Carex riparia. These synonyms refer to other species within the same family that share similar characteristics with Carex acutiformis. While these plants may look similar, they may have slightly different growth habits or physical features, such as differences in leaf blades or stem height. Regardless of their slight differences, all of these plants play important roles in wetland ecosystems by providing habitat and helping to filter water.