Carex atratiformis

{{Short description|Species of sedge}}

{{Use dmy dates|date=January 2023}}

{{Speciesbox

| image = Carex_atratiformis_iNat-23703763.jpg

| image_caption =

| genus = Carex

| species = atratiformis

| authority = Britton, 1895

}}

Carex atratiformis, also known as scrabrous black sedge, is a species of flowering plant in the sedge family, Cyperaceae. It is native to Canada and the Northeastern United States.{{cite web|url=https://powo.science.kew.org/taxon/urn:lsid:ipni.org:names:45808-2|title=Carex atratiformis Britton|access-date=21 January 2023|publisher=Kew Science – Plants of the World Online}}