Asplenium unisorum
Asplenium unisorum, the singlesorus island spleenwort, is a species of fern endemic to the Hawaiian Islands. It only lives between 650 and 700 m (2,130 and 2,300 ft) in the Waiʻanae Range on the island of Oʻahu. It is classified as critically endangered, with a fragmented, actively shrinking mature population of around 1,150.
| Asplenium unisorum | |
|---|---|
| |
Scientific classification 
| |
| Kingdom: | Plantae |
| Clade: | Tracheophytes |
| Division: | Polypodiophyta |
| Class: | Polypodiopsida |
| Order: | Polypodiales |
| Suborder: | Aspleniineae |
| Family: | Aspleniaceae |
| Genus: | Asplenium |
| Species: | A. unisorum
|
| Binomial name | |
| Asplenium unisorum | |
| Synonyms[4] | |
|
Diellia unisora Wagner | |
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 (2,130 and 2,300 ft) in the Waiʻanae Range on the island of Oʻahu.[1] It is classified as critically endangered, with a fragmented, actively shrinking mature population of around 1,150.[1]
Description
[edit]It grows 5–30 mm (0.2–1.2 in) tall, with a 5–10 mm (0.2–0.4 in) 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 2–5 cm (0.8–2.0 in) long.[6] Branching off from the stalks, the fronds of the fern are 8–30 cm (3.1–11.8 in) tall by 0.5–3 cm (0.2–1.2 in) broad.[6]
References
[edit]- ^ 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.
- ^ "No common name (Asplenium unisorum)". Environmental Conservation Online System. U.S. Fish & Wildlife Service. Retrieved 20 June 2024.
- ^ "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.
- ^ a b "Asplenium unisorum (Wagner) Viane)". Global Biodiversity Information Facility. Retrieved 1 January 2025.
- ^ "Asplenium unisorum (W.H. Wagner) Viane". Integrated Taxonomic Information System. Retrieved 20 June 2024.
- ^ a b c d "Singlesorus Island Spleenwort". U.S. Fish & Wildlife Service. Retrieved 2025-02-25.
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