Overview

Distribution

Range Description

Narrowly endemic to two adjacent peaks in the northern Waianae Mountains of Oahu. A. trinerve has been recorded from three subpopulations, with a combined population size of 63 plants. Less than fifty mature individuals exist within the current population.
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National Distribution

United States

Origin: Native

Regularity: Regularly occurring

Currently: Present

Confidence: Confident

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Localities documented in Tropicos sources

Alsinidendron trinerve H. Mann:
United States (North America)

Note: This information is based on publications available through Tropicos and may not represent the entire distribution. Tropicos does not categorize distributions as native or non-native.
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Global Range: Current range: Waianae Mountains of Oahu. Historically no additional range.

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Physical Description

Diagnostic Description

Sepals 4; leaf apex acuminate, acute, or sometimes submucronate; peduncles 2.3-3.5 cm long, inflorescences open. Oahu. (Wagner et al., 1990)

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Type Information

Isotype for Alsinidendron trinerve H. Mann
Catalog Number: US 10261
Collection: Smithsonian Institution, National Museum of Natural History, Department of Botany
Verification Degree: Status verified from secondary sources
Preparation: Pressed specimen
Collector(s): H. Mann & W. T. Brigham
Locality: Kaala Mts., Oahu., Honolulu, O`ahu, Hawaii, United States, Hawaiian Archipelago, Pacific Islands
  • Isotype: Mann, A. 1866. Proc. Boston Soc. Nat. Hist. 10: 312.
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Ecology

Habitat

Habitat and Ecology

Habitat and Ecology
A subshrub found on slopes in wet forests or the wetter portions of diverse mesic forest, 900 to 1,230 meters.

Systems
  • Terrestrial
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Comments: Slopes or ridges in wet forest or wetter portions of diverse mesic forest. Also found in drier forests.

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Population Biology

Number of Occurrences

Note: For many non-migratory species, occurrences are roughly equivalent to populations.

Estimated Number of Occurrences: 1 - 5

Comments: Two current (between 1982 and 1997) and four historical occurrences.

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Life History and Behavior

Life Cycle

Persistence: PERENNIAL

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Molecular Biology and Genetics

Molecular Biology

Barcode data: Schiedea trinervis

The following is a representative barcode sequence, the centroid of all available sequences for this species.


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Statistics of barcoding coverage: Schiedea trinervis

Barcode of Life Data Systems (BOLDS) Stats
Public Records: 2
Specimens with Barcodes: 2
Species With Barcodes: 1
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Conservation

Conservation Status

IUCN Red List Assessment


Red List Category
CR
Critically Endangered

Red List Criteria
D

Version
3.1

Year Assessed
2003

Assessor/s
Bruegmann, M.M. & Caraway, V.

Reviewer/s
Maunder, M. (Plant Conservation Committee) & Dickinson, T. (Red List Programme Office)

Contributor/s

Justification
Endemic to the Waianae mountains of Oahu. A. trinerve has been recorded from three subpopulations, with a combined population size of 63 plants. Less than fifty mature individuals exist within the current population. A continuing decline of this population has been noted.
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National NatureServe Conservation Status

United States

Rounded National Status Rank: N1 - Critically Imperiled

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NatureServe Conservation Status

Rounded Global Status Rank: G1 - Critically Imperiled

Reasons: Narrowly endemic to two adjacent peaks in the northern Waianae Mountains of Oahu. The three currently known populations contain a total of fewer than 40 plants. The primary threats to the species are feral pigs and alien plants.

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Population

Population Trend
Decreasing
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Threats

Major Threats
Threats to A. trinerve include, invasion of habitat by the Florida prickly blackberry, habitat degradation by feral goats and pigs. Trampling and collecting of A. trinerve by humans may also contribute to the decline of the population.
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Comments: Threats include alien vegetation and trampling from feral animals (especially pigs) and humans, and overcollection.

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Management

Conservation Actions

Conservation Actions
Listed as Endangered with the U.S. Fish and Wildlife Service.
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Biological Research Needs: Population biology and ecology.

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Wikipedia

Alsinidendron trinerve

Alsinidendron trinerve (also called Three Nerved Alsinidendron) is a species of flowering plant in the carnation family, Caryophyllaceae, that is endemic to island of Oʻahu in Hawaii. It is a subshrub, reaching a height of 30–80 cm (12–31 in).

Three-Nerved Alsinidendron inhabits mixed mesic and wet forests on the slopes of the Waiʻanae Range at elevations of 900–1,230 m (2,950–4,040 ft). Associated plants include pilo (Coprosma spp.), ʻapeʻape (Gunnera petaloidea), ʻalani (Melicope spp.), hāpuʻu (Cibotium spp.), hame (Antidesma platyphyllum), and māmaki (Pipturus albidus). It is threatened by habitat loss.[2]

References[edit]

  1. ^ Bruegmann, M.M. & Caraway, V. (2003). "Alsinidendron trinerve". IUCN Red List of Threatened Species. Version 2013.2. International Union for Conservation of Nature. Retrieved 31 January 2014. 
  2. ^ "Alsinidendron trinerve". CPC National Collection Plant Profiles. Center for Plant Conservation. 2008-07-22. Retrieved 2009-11-16. 


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Names and Taxonomy

Taxonomy

Comments: ENDEMIC GENUS OF 4 SPECIES, SPECIES ENDEMIC TO WAIANAE MTS OF OAHU.

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