You selected Campanula sessiliflora K.Koch, nom. illeg. This is a synonym for:

Accepted scientific name:
Campanula persicifolia subsp. sessiliflora (Velen.) Fed. ex Greuter & Burdet (accepted name) 1 literature reference for Campanula persicifolia subsp. sessiliflora (Velen.) Fed. ex Greuter & Burdet
Synonyms:
Campanula persicaster F.Herm. (synonym) 1 literature reference for Campanula persicaster F.Herm.
Campanula persicifolia var. latisepala Degen & Dörfl. (synonym) 1 literature reference for Campanula persicifolia var. latisepala Degen & Dörfl.
Campanula persicifolia var. sessiliflora Velen. (synonym) 1 literature reference for Campanula persicifolia var. sessiliflora Velen.
Campanula persicifolia var. snjagovi Velchev & P.Vassil. (synonym) 1 literature reference for Campanula persicifolia var. snjagovi Velchev & P.Vassil.
Campanula sessiliflora K.Koch, nom. illeg. (synonym) 1 literature reference for Campanula sessiliflora K.Koch, nom. illeg.
Common names: -
Classification:
Plantae
Phylum Magnoliophyta
Class Magnoliopsida
Order Campanulales
Family Campanulaceae
Genus Campanula
Species Campanula persicifolia
Distribution: Slowenia to Macedonia
Additional data: -
Source database: World Checklist of Selected Plant Families, 27 Nov 2009
Latest taxonomic scrutiny: Govaerts R., 13-Jun-2008
Online resource: http://apps.kew.org/wcsp/namedetail.do?accepted_id=365544&repSynonym_id=-9998&name_id=365544&status=true
CoL taxon LSID: urn:lsid:catalogueoflife.org:taxon:27128cfa-60a7-102d-be47-00304854f810:ac2010