You selected Galium ambiguum subsp. siskiyouense (Ferris) Dempster & Stebbins. This is a synonym for:

Accepted scientific name:
Galium stebbinsii subsp. siskiyouense (Ferris) ined. (accepted name)
Synonyms:
Galium ambiguum subsp. siskiyouense (Ferris) Dempster & Stebbins (synonym) 1 literature reference for Galium ambiguum subsp. siskiyouense (Ferris) Dempster & Stebbins
Galium ambiguum var. siskiyouense Ferris (synonym) 1 literature reference for Galium ambiguum var. siskiyouense Ferris
Common names: -
Classification:
Plantae
Phylum Magnoliophyta
Class Magnoliopsida
Order Rubiales
Family Rubiaceae
Genus Galium
Species Galium stebbinsii
Distribution: W. Canada
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=87567&repSynonym_id=-9998&name_id=87567&status=true
CoL taxon LSID: urn:lsid:catalogueoflife.org:taxon:f64f7178-29c1-102b-9a4a-00304854f820:ac2010