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
NatureServe resource Species
BOLDS resource for species-level taxa
Chiricahua National Monument - Plants
  • Pellaea atropurpurea
Coronado National Memorial Ferns
  • Pellaea atropurpurea
DiscoverLife map resource
  • Pellaea atropurpurea
EOL Group on Flickr
Go Botany: New England Wild Flower Society Import
Integrated Taxonomic Information System (ITIS)
view in classification
NCBI Taxonomy
view in classification
BOLDS images II Species
Southeast Arizona Group Chiricahua NM
  • Pellaea atropurpurea
Southeast Arizona Group Coronado NMem
  • Pellaea atropurpurea
Chiricahua National Monument Ferns
  • Pellaea atropurpurea outlinks
The Coronado National Memorial - Plants
  • Pellaea atropurpurea
Tropicos resource
Tropicos resource Species
USDA PLANTS Structured Data
  • Pellaea atropurpurea
USDA Plants
iNaturalist Images Species


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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