Rhynchospora

Rhynchospora is a genus of flowering plants in the sedge family, Cyperaceae. Commonly known as beak-rushes, these plants are found in wet or moist habitats worldwide, with the greatest diversity in tropical and subtropical regions. The genus is characterized by its distinctive fruit, which has a prominent, beak-like projection called a rostrum. This rostrum is an extension of the style and aids in seed dispersal.

Rhynchospora species exhibit a wide range of growth habits, from small, delicate annuals to larger, perennial tussocks. Their leaves are typically grass-like, and the inflorescences are usually spike-like clusters of small flowers. Many species are important components of wetland ecosystems, such as bogs, fens, and marshes, and play a role in nutrient cycling and soil stabilization. Some species are also significant in the diets of various animals.

The taxonomy of Rhynchospora is complex, with many species and numerous synonyms. Several species are found in North America, including Rhynchospora capitata and Rhynchospora corniculata, which are widespread in various wetland environments. Other species are more geographically restricted. Due to their specific habitat requirements, some Rhynchospora species are considered rare or endangered. Their identification often relies on detailed examination of floral and fruit characteristics.