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Helichrysum sp. nov. D 

Scope: Global
Language: English
Status_ne_offStatus_dd_offStatus_lc_offStatus_nt_offStatus_vu_offStatus_en_onStatus_cr_offStatus_ew_offStatus_ex_off

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Taxonomy [top]

Kingdom Phylum Class Order Family
Plantae Tracheophyta Magnoliopsida Asterales Asteraceae

Scientific Name: Helichrysum sp. nov. D (Miller 20020, E)
Taxonomic Notes: Vouchers: Miller 20020; 20021 (E).

Assessment Information [top]

Red List Category & Criteria: Endangered B2ab(iii) ver 3.1
Year Published: 2004
Date Assessed: 2004-04-30
Annotations:
Needs updating
Assessor(s): Miller, A.
Reviewer(s): Abuzinada, A.H. & AL-Eisawi, D.M.H. (Arabian Plants Red List Authority)
Justification:
Helichrysum dioscorides is restricted to a small refugium with a total estimated area of occupancy of less than 10 km². At present the rapid development of the island poses no threat to this unique habitat: the area is inhospitable, inaccessible by road and there is a lack of potable water. However, its restricted distribution and the very limited extent of the niche which it occupies means that it is vulnerable to any change. It is strongly suspected that this marginal habitat is threatened by the long-term trend of lower rainfall in the region and would be particularly vulnerable to the effects of global warming (Miller and Morris 2004).

Geographic Range [top]

Range Description:Endemic to Soqotra.
Countries occurrence:
Native:
Yemen (Socotra)
Additional data:
Range Map:Click here to open the map viewer and explore range.

Population [top]

Current Population Trend:Unknown
Additional data:

Habitat and Ecology [top]

Habitat and Ecology:Restricted to cliffs on a windswept ridge at the western end of Soqotra. Altitude of 380–530 m.

Similar to Helichrysum samhaensis but distinguished by the yellow-green, non-fleshy leaves, broadly spathulate leaves. Only known from two collections, both lack mature flowers on the isolated ridge at Heger (between Riy di Isfer and Riy do Sherubrub) in the extreme east of the island. This ridge probably captures mists from the monsoon (cf. Nesocrambe socotrana and Pulicaria dioscorides).
Systems:Terrestrial

Classifications [top]

0. Root -> 6. Rocky areas (eg. inland cliffs, mountain peaks)
suitability:Suitable  

In-Place Research, Monitoring and Planning
In-Place Land/Water Protection and Management
In-Place Species Management
In-Place Education
11. Climate change & severe weather -> 11.2. Droughts
♦ timing:Ongoing    
→ Stresses
  • 1. Ecosystem stresses -> 1.2. Ecosystem degradation
  • 2. Species Stresses -> 2.1. Species mortality

1. Research -> 1.1. Taxonomy

Bibliography [top]

IUCN. 2004. 2004 IUCN Red List of Threatened Species. Available at: www.iucnredlist.org. (Accessed: 23 November 2004).

Miller, A.G. and Morris, M. 2004. Ethnoflora of the Soqotra Archipelago. Royal Botanic Garden Edinburgh, Edinburgh.


Citation: Miller, A. 2004. Helichrysum sp. nov. D. The IUCN Red List of Threatened Species 2004: e.T44841A10952668. . Downloaded on 26 April 2018.
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