| Asplenium unisorum | |
|---|---|
| |
Scientific classification 
| |
| Kingdom: | Plantae |
| Clade: | Embryophytes |
| Clade: | Tracheophytes |
| Division: | Polypodiophyta |
| Class: | Polypodiopsida |
| Order: | Polypodiales |
| Suborder: | Aspleniineae |
| Family: | Aspleniaceae |
| Genus: | Asplenium |
| Species: | A. unisorum
|
| Binomial name | |
| Asplenium unisorum | |
| Synonyms4 | |
|
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
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
References
- 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.
- "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.
- "Singlesorus Island Spleenwort". U.S. Fish & Wildlife Service. Retrieved 2025-02-25.