You selected Betula forrestii var. calcicola (W.W.Sm.) Hand.-Mazz. This is a synonym for:

Accepted scientific name:
Betula calcicola (W.W.Sm.) P.C.Li (accepted name) 1 literature reference for Betula calcicola (W.W.Sm.) P.C.Li
Synonyms:
Betula delavayi var. calcicola W.W.Sm. (synonym) 1 literature reference for Betula delavayi var. calcicola W.W.Sm.
Betula forrestii var. calcicola (W.W.Sm.) Hand.-Mazz. (synonym) 1 literature reference for Betula forrestii var. calcicola (W.W.Sm.) Hand.-Mazz.
Common names: -
Classification:
Plantae
Phylum Magnoliophyta
Class Magnoliopsida
Order Fagales
Family Betulaceae
Genus Betula
Distribution: SC. China
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=21201&repSynonym_id=-9998&name_id=21201&status=true
CoL taxon LSID: urn:lsid:catalogueoflife.org:taxon:f29abbbe-29c1-102b-9a4a-00304854f820:ac2010