Scientists aim to describe a single 'tree of life' that reflects the evolutionary relationships of living things. However, evolutionary relationships are a matter of ongoing discovery, and there are different opinions about how living things should be grouped and named. EOL reflects these differences by supporting several different scientific 'classifications'. Some species have been named more than once. Such duplicates are listed under synonyms. EOL also provides support for common names which may vary across regions as well as languages.

Preferred marks the preferred classification for this taxon.

Recognized By Rank Classification
Species 2000 & ITIS Catalogue of Life: April 2013
view in classification
Species Import
BOLDS resource for species-level taxa
BioImages resource Species
Botany resource
DiscoverLife map resource
  • Polemonium caeruleum
EOL Group on Flickr
view in classification
B - Fachrichtung Stauden - Stauden
  • Polemonium caeruleum
Flora Helvetica - rest
  • Polemonium caeruleum
GBIF Elevation Data Species
GBIF national node classification resource: Germany Subspecies
Global Biotic Interactions Species
Global Compendium of Weeds Species
  • Polemonium caeruleum
Go Botany: New England Wild Flower Society
IABIN resource
BOLDS images II Species
Integrated Taxonomic Information System (ITIS)
view in classification
Inventaire National du Patrimoine Naturel Species
NCBI Taxonomy
view in classification
National Wetland Plant List 2013
NatureServe resource Species
Flora Helvetica
Plants of Switzerland by Flora Helvetica
  • Polemonium caeruleum
BHL: BioDivLibrary's photostream outlinks
  • Polemonium caeruleum
Taxonomic Hierarchy of COL-China 2012
view in classification
Tropicos resource
USDA PLANTS Structured Data
  • Polemonium caeruleum
USDA Plants
Wikimedia Commons
iNaturalist Images Species
iSpot links Species
  • Polemonium caeruleum


EOL content is automatically assembled from many different content providers. As a result, from time to time you may find pages on EOL that are confusing.

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