Asplenium unisorum

Asplenium unisorum
Potted small fern with pinnate light-green leaves and brown leaf axes
Scientific classification Edit this classification
Kingdom: Plantae
Clade: Tracheophytes
Division: Polypodiophyta
Class: Polypodiopsida
Order: Polypodiales
Suborder: Aspleniineae
Family: Aspleniaceae
Genus: Asplenium
Species:
A. unisorum
Binomial name
Asplenium unisorum
(Wagner) Viane
Synonyms

Diellia unisora Wagner

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.

Description

It grows 5–30 mm (0.2–1.2 in) tall, with a 5–10 mm (0.2–0.4 in) diameter. Leaf stalks branch off the main stem, which also features a few "small black scales". The stalks themselves are "black and shiny", around 2–5 cm (0.8–2.0 in) long. 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.

References

  1. 1 2 3 4 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. 1 2 "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. 1 2 3 4 "Singlesorus Island Spleenwort". U.S. Fish & Wildlife Service. Retrieved 2025-02-25.