dcsimg
2010 Zoya Akulova   cc-by-nc

Woodwardia (Chainfern) is a genus of herb in the family blechnoids. This genus is extinct. They are native to Canada and The Contiguous United States. They have alternation of generations.

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  • URI: http://eol.org/schema/terms/extinct
  • Definition: A taxon is Extinct when there is no reasonable doubt that the last individual has died. A \r\ntaxon is presumed Extinct when exhaustive surveys in known and/or expected habitat, \r\nat appropriate times (diurnal, seasonal, annual), throughout its historic range have failed \r\nto record an individual. Surveys should be over a time frame appropriate to the taxon’s life cycle and life form.
  • Attribution: http://www.iucnredlist.org/technical-documents/categories-and-criteria
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EOL has data for 17 attributes, including:

Known occurrences, collected specimens and observations of chainfern. View this species on GBIF