About Carex crus-corvi Shuttlew. ex Kunze
Carex crus-corvi, commonly known as raven's foot sedge or crowfoot sedge, is a species of flowering plant belonging to the family Cyperaceae. It is native to southern Ontario, Canada, and the central and southeastern United States. It has also been introduced to Belgium. This perennial plant grows up to 90 cm (3 ft) tall, is hardy to USDA zone 4, and is an obligate wetland species that occurs in a wide variety of wetland habitats.