Asplenium unisorum, the singlesorus island spleenwort,[5] is a species of fern endemic to the Hawaiian Islands.[1] It only lives between 650 and 700 m in the Wai'anae Mountains on the island of O'ahu.[1] It is classified as critically endangered, with a fragmented, actively shrinking mature population of around 1,148.[1]

Description

It grows 0.5-3.0cm tall, with a 0.5-1.0cm diameter.[6] Leaf stalks branch off the main stem, which also features a few "small black scales".[6] The stalks themselves are "black and shiny", around 2.0-5.0cm long.[6] Branching off from the stalks, the fronds of the fern are 8.0-30.0cm tall by 0.5-3.0cm broad.[6]

References

  1. ^ a b c d Keir, M.; Sugii, N.; Gon, S.M.; Chau, M.; Kwon, J.; Weisenberger, L. (2017) [errata version of 2016 assessment]. "Asplenium unisorum". IUCN Red List of Threatened Species. 2016: e.T78775516A115493966. doi:10.2305/IUCN.UK.2016-1.RLTS.T78775516A78775751.en.
  2. ^ "No common name (Asplenium unisorum)". Environmental Conservation Online System. U.S. Fish & Wildlife Service. Retrieved 20 June 2024.
  3. ^ "Endangered and Threatened Wildlife and Plants; Endangered Status for Three Plants From the Waianae Mountains, Island of Oahu, HI". Federal Register. 59 (122): 32932–32938.
  4. ^ a b "Asplenium unisorum (Wagner) Viane)". Global Biodiversity Information Facility. Retrieved 1 January 2025.
  5. ^ "Asplenium unisorum (W.H. Wagner) Viane". Integrated Taxonomic Information System. Retrieved 20 June 2024.
  6. ^ a b c d "Singlesorus Island Spleenwort". U.S. Fish & Wildlife Service. Retrieved 2025-02-25.


Allikas: https://en.wikipedia.org/wiki/Asplenium_unisorum
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