You selected Galium laevigatum Bartl. ex DC. This is a synonym for:

Accepted scientific name:
Galium microphyllum A.Gray (accepted name) 1 literature reference for Galium microphyllum A.Gray
Synonyms:
Galium laevigatum Bartl. ex DC. (synonym) 1 literature reference for Galium laevigatum Bartl. ex DC.
Galium nitens M.E.Jones (synonym) 1 literature reference for Galium nitens M.E.Jones
Galium repens Sessé & Moç. (synonym) 1 literature reference for Galium repens Sessé & Moç.
Relbunium laevigatum (DC.) Hemsl. (synonym) 1 literature reference for Relbunium laevigatum (DC.) Hemsl.
Relbunium microphyllum (A.Gray) Hemsl. (synonym) 1 literature reference for Relbunium microphyllum (A.Gray) Hemsl.
Relbunium microphyllum var. hispidulum Greenm. (synonym) 1 literature reference for Relbunium microphyllum var. hispidulum Greenm.
Relbunium microphyllum var. setulosum Greenm. (synonym) 1 literature reference for Relbunium microphyllum var. setulosum Greenm.
Rubia laevigata DC. (synonym) 1 literature reference for Rubia laevigata DC.
Common names: -
Classification:
Plantae
Phylum Magnoliophyta
Class Magnoliopsida
Order Rubiales
Family Rubiaceae
Genus Galium
Distribution: Texas, New Mexico, Arizona, E. Mexico
Additional data: -
Source database: World Checklist of Selected Plant Families, 27 Nov 2009
Latest taxonomic scrutiny: Govaerts R., 11-Nov-2003
Online resource: http://apps.kew.org/wcsp/namedetail.do?accepted_id=86815&repSynonym_id=-9998&name_id=86815&status=true
CoL taxon LSID: urn:lsid:catalogueoflife.org:taxon:f143faf0-29c1-102b-9a4a-00304854f820:ac2010