Clermontia peleana subsp. singuliflora
|Scientific Name:||Clermontia peleana Rock subsp. singuliflora (Rock) Lammers|
Clermontia gaudichaudii Hillebr. var. singuliflora Rock
|Taxonomic Source(s):||Wagner, W.L., Herbst, D.R. and Lorence, D.H. 2005 onwards. Flora of the Hawaiian Islands website. Available at: http://botany.si.edu/pacificislandbiodiversity/hawaiianflora/index.htm.|
|Red List Category & Criteria:||Critically Endangered B1ab(iii)+2ab(iii); D ver 3.1|
|Assessor(s):||Bruegmann, M., Caraway, V.L. & Keir, M.|
Clermontia peleana subsp. singuliflora is assessed as Critically Endangered. The taxon is endemic to the island of Hawaiʻi and has an extent of occurrence of 4 km². It has experienced severe and ongoing decline in habitat and numbers due to the impacts of invasive plants and animals. Its area of occupancy is 4 km² and declining. Its distribution is severely limited, occurring in only one subpopulation. This qualifies the taxon for a ranking of Critically Endangered under criteria B1ab(iii)+2ab(iii); D.
|Previously published Red List assessments:|
Endemic to the Hawaiian islands, between 530 and 1,150 m elevation on the island of Hawaiʻi.
Native:United States (Hawaiian Is.)
|Range Map:||Click here to open the map viewer and explore range.|
The taxon is extremely rare, with a total known population of seven individuals in a single subpopulation.
|Current Population Trend:||Stable|
|Habitat and Ecology:|
The taxon is an epiphytic shrub or small tree found in Hawaiian wet forest.
|Continuing decline in area, extent and/or quality of habitat:||Yes|
The major threats to this taxon include direct competition by invasive non-native plant species, and predation and habitat degradation by non-native animals, particularly feral pigs and goats, which degrade the habitat and harm the plants through predation, trampling, and rooting for food. Alien plants also threaten the species by altering its habitat and competing with it for moisture, nutrients, light, and space. Rats pose a threat to the species through predation of its plant parts and fruits; and introduced slugs and snails threaten the species by feeding on its leaves, stems, and seedlings. Since the species is epiphytic, it is threatened by wind and falling tree branches.
The taxon is on the U.S. Endangered Species List, and also on the State of Hawaiʻi Endangered Species List. The single subpopulation does not occur in any protected area, but it is managed and monitored by the Hawaiʻi State Plant Extinction Prevention Program. Ex situ cultivation and propagule storage is ongoing. Outplantings have occurred, but it is not known whether they have produced any viable offspring. Further research is needed on general ecology, life history, population size, distribution, and trends; population genetics, and threats.
IUCN. 2016. The IUCN Red List of Threatened Species. Version 2016-2. Available at: www.iucnredlist.org. (Accessed: 04 September 2016).
Plant Extinction Prevention Program. 2014. Program annual report, fiscal year 2014 (July 1, 2013-June 30, 2014). Unpublished.
U.S. Fish and Wildlife Service. 2003. Rare plant database. Unpublished.
U.S. Fish and Wildlife (USFWS). 2015. Clermontia peleana ('oha wai) 5-Year Review and Summary.
Wagner, W., Herbst, D. and Sohmer S. 1999. Manual of the Flowering Plants of Hawaii. Bernice Pauahi Bishop Museum Special Publication 91: 1-1918.
|Citation:||Bruegmann, M., Caraway, V.L. & Keir, M. 2016. Clermontia peleana subsp. singuliflora. The IUCN Red List of Threatened Species 2016: e.T44103A83796126.Downloaded on 24 June 2018.|
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