Governor Laffan's Fern (Diplazium laffanianum) is classified as Extinct in the Wild, having last been seen in 1905 after human habitat destruction and introduction of invasive species.
Notes on verification
Confirmed by IUCN, peer-reviewed American Fern Journal paper, Bermuda's Department of Environment, and CPSG, with consistent details on species, status, last sighting, and causes. [cascade flags: wikipedia_dropped_other_sources_exist | tier=unverified indep_score=0.3 clusters=3 claim_tier=notable] [rescored 2026-09-15: curated origin-host map (PR #65); unclassified hosts no longer scored as aggregators]
Sources
- IUCN Red List raises more red flags for threatened species (seed:environment_and_wildlife)
- https://environment.bm/governor-laffans-fern (corroboration)
- https://www.cpsg.org/success-stories/governor-laffans-fern (corroboration)
- https://bioone.org/journals/american-fern-journal/volume-106/issue-3/AFJ-D-16-00005.1/Systematics-of-Diplazium-laffanianum-Athyriaceae-a-Fern-Species-Endemic-to/10.1640/AFJ-D-16-00005.1.short (corroboration)