Taxonomy [top]

Kingdom Phylum Class Order Family
Plantae Tracheophyta Liliopsida Arecales Palmae

Scientific Name: Hyophorbe amaricaulis
Species Authority: Martius

Assessment Information [top]

Red List Category & Criteria: Critically Endangered B1+2abde, C1+2b, D ver 2.3
Year Published: 2000
Date Assessed: 2000-06-30
Needs updating
Assessor(s): Bachraz, V. (TPTNC) & Strahm, W.
Reviewer(s): Bachraz, V. & Florens, D. (Indian Ocean Island Plant Red List Authority)
Only one individual remains in the wild, hence the risk of extinction is very high. Intrinsic problems with the remaining plant also prevent pollination and any recruitment.
Previously published Red List assessments:
1998 Critically Endangered (CR)

Geographic Range [top]

Range Description: Last individual existing in the wild and hence the risk of extinction is very high. Also intrinsic factors in the only plant preventing pollination. Last specimen of this species growing in Curepipe Botanical Garden. Had been reported in the past on the top of Peter Both Mountain. For a very long time it has been confused with H. ilagenicaulis (Round Island bottle palm). This single specimen has persisted within the Curepipe Botanical Garden for over fifty years, and flowers and fruits regularly. However, the fruits are sterile because the male flower open before the female, thus precluding any pollination. Although this palm does not produce viable seeds, plants have on several occasions, been cloned by tissue culture of the embryo at Wye, Edinburg, and Kew. Unfortunately, each time the plants were removed from sterile medium, they died.
Countries occurrence:
Range Map: Click here to open the map viewer and explore range.

Population [top]

Current Population Trend: Decreasing
Additional data:

Habitat and Ecology [top]

Habitat and Ecology: Tropical degraded forest (upland forest).
Systems: Terrestrial

Threats [top]

Major Threat(s): Only individual existing in the wild. Hence very susceptible to disease, and cyclone. Prone to hybridization. No natural pollination because of intrinsic factors

Conservation Actions [top]

Conservation Actions: Collection are storage of pollen for self pollination under controlled conditions. Cloning of remaining genotype: Material has already sent to Kew Garden by National Parks and Conservation Service and they are using H. lagenicaulis as test plant whereby they have been successful with the somatic embryogenesis of the said species.

Classifications [top]

1. Forest -> 1.5. Forest - Subtropical/Tropical Dry
suitability: Unknown  

In-Place Research, Monitoring and Planning
In-Place Land/Water Protection and Management
In-Place Species Management
In-Place Education
8. Invasive & other problematic species & genes -> 8.1. Invasive non-native/alien species -> 8.1.1. Unspecified species
♦ timing: Ongoing    
→ Stresses
  • 2. Species Stresses -> 2.3. Indirect species effects -> 2.3.1. Hybridisation

8. Invasive & other problematic species & genes -> 8.2. Problematic native species
♦ timing: Ongoing    
→ Stresses
  • 2. Species Stresses -> 2.3. Indirect species effects -> 2.3.3. Loss of mutualism

11. Climate change & severe weather -> 11.4. Storms & flooding
♦ timing: Ongoing    
→ Stresses
  • 1. Ecosystem stresses -> 1.2. Ecosystem degradation

Bibliography [top]

Baillie, J. and Groombridge, B. (eds). 1996. 1996 IUCN Red List of Threatened Animals. pp. 378. International Union for Conservation of Nature, Gland, Switzerland and Cambridge, UK.

Bosser, J., Cadet, Th., Julien, H.R. and Marais, W. 1984. Flore des Mascareignes, 189 Palmiers. The Sugar Industry Research Institute, Mauritius, ORSTOM, Paris and RBG, Kew.

Hilton-Taylor, C. 2000. 2000 IUCN Red List of Threatened Species. IUCN, Gland, Switzerland and Cambridge, UK.

Johnson, D. et al. 1997. Completed data collection forms for palms.

Kyburg, R. 1998. Hyophorbe amaricaulis in Cuba. Principes 42:9-10.

Citation: Bachraz, V. (TPTNC) & Strahm, W. 2000. Hyophorbe amaricaulis. The IUCN Red List of Threatened Species 2000: e.T38578A10125958. . Downloaded on 04 October 2015.
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