⚠ Version 1 of The Plant List has been superseded.

This name is in version 1.1 of The Plant List, record tro-50122944, and has not been changed.

Carex atrata var. nigra W. Boott is a synonym of Carex helleri Mack.

This name is a synonym of Carex helleri Mack..

The record derives from Tropicos which reports it as a synonym (record 50122944) with original publication details: Rep. U.S. Geogr. Surv., Wheeler, Vol. 6, Botany 6: 278 278 1879.

Full publication details for this name can be found in IPNI: urn:lsid:ipni.org:names:45805-2.