You selected Carex retrorsa var. robinsonii Fernald. This is a synonym for:

Accepted scientific name:
Carex retrorsa Schwein. (accepted name) 1 literature reference for Carex retrorsa Schwein.
Synonyms:
Carex lupulina var. gigantoidea Dewey (synonym) 1 literature reference for Carex lupulina var. gigantoidea Dewey
Carex retrorsa var. gigantoides Farw. (synonym) 1 literature reference for Carex retrorsa var. gigantoides Farw.
Carex retrorsa var. multispicula Lepage (synonym) 1 literature reference for Carex retrorsa var. multispicula Lepage
Carex retrorsa var. robinsonii Fernald (synonym) 1 literature reference for Carex retrorsa var. robinsonii Fernald
Carex reversa Spreng. (synonym) 1 literature reference for Carex reversa Spreng.
Common names: -
Classification:
Plantae
Phylum Magnoliophyta
Class Liliopsida
Order Poales
Family Cyperaceae
Genus Carex
Distribution: Canada to N. & WC. U.S.A.
Additional data: -
Source database: World Checklist of Selected Plant Families, 27 Nov 2009
Latest taxonomic scrutiny: Govaerts R., 21-Jun-2005
Online resource: http://apps.kew.org/wcsp/namedetail.do?accepted_id=230323&repSynonym_id=-9998&name_id=230323&status=true
CoL taxon LSID: urn:lsid:catalogueoflife.org:taxon:f1cb9046-29c1-102b-9a4a-00304854f820:ac2010