The IUCN Red List of Threatened Species™
ISSN 2307-8235 (online)
IUCN 2008: T44841A10952668
Helichrysum sp. nov. D
Assessment by: Miller, A.
View on www.iucnredlist.org
Citation: Miller, A. 2004. Helichrysum sp. nov. D. The IUCN Red List of Threatened Species 2004:
e.T44841A10952668. http://dx.doi.org/10.2305/IUCN.UK.2004.RLTS.T44841A10952668.en
Copyright: © 2015 International Union for Conservation of Nature and Natural Resources
Reproduction of this publication for educational or other non-commercial purposes is authorized without prior written
permission from the copyright holder provided the source is fully acknowledged.
Reproduction of this publication for resale, reposting or other commercial purposes is prohibited without prior written
permission from the copyright holder. For further details see Terms of Use.
The IUCN Red List of Threatened Species™ is produced and managed by the IUCN Global Species Programme, the IUCN
Species Survival Commission (SSC) and The IUCN Red List Partnership. The IUCN Red List Partners are: BirdLife
International; Botanic Gardens Conservation International; Conservation International; Microsoft; NatureServe; Royal
Botanic Gardens, Kew; Sapienza University of Rome; Texas A&M University; Wildscreen; and Zoological Society of London.
If you see any errors or have any questions or suggestions on what is shown in this document, please provide us with
feedback so that we can correct or extend the information provided.
THE IUCN RED LIST OF THREATENED SPECIES™
Taxonomy
Kingdom
Phylum
Class
Order
Family
Plantae
Tracheophyta
Magnoliopsida
Asterales
Compositae
Taxon Name: Helichrysum sp. nov. D (Miller 20020, E)
Taxonomic Notes:
Vouchers: Miller 20020; 20021 (E).
Assessment Information
Red List Category & Criteria:
Endangered B2ab(iii) ver 3.1
Year Published:
2004
Date Assessed:
April 30, 2004
Annotations:
Needs Updating
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
Range Description:
Endemic to Soqotra.
Country Occurrence:
Native: Yemen (Socotra)
© The IUCN Red List of Threatened Species: Helichrysum sp. nov. D – published in 2004.
http://dx.doi.org/10.2305/IUCN.UK.2004.RLTS.T44841A10952668.en
1
Distribution Map
© The IUCN Red List of Threatened Species: Helichrysum sp. nov. D – published in 2004.
http://dx.doi.org/10.2305/IUCN.UK.2004.RLTS.T44841A10952668.en
2
Population
Current Population Trend: Unknown
Habitat and Ecology (see Appendix for additional information)
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
Credits
Assessor(s):
Miller, A.
Reviewer(s):
Abuzinada, A.H. & AL-Eisawi, D.M.H. (Arabian Plants Red List Authority)
© The IUCN Red List of Threatened Species: Helichrysum sp. nov. D – published in 2004.
http://dx.doi.org/10.2305/IUCN.UK.2004.RLTS.T44841A10952668.en
3
Bibliography
IUCN. 2004. 2004 IUCN Red List of Threatened Species. www.iucnredlist.org. Downloaded on 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. http://dx.doi.org/10.2305/IUCN.UK.2004.RLTS.T44841A10952668.en
Disclaimer
To make use of this information, please check the Terms of Use.
External Resources
For Images and External Links to Additional Information, please see the Red List website.
© The IUCN Red List of Threatened Species: Helichrysum sp. nov. D – published in 2004.
http://dx.doi.org/10.2305/IUCN.UK.2004.RLTS.T44841A10952668.en
4
Appendix
Habitats
(http://www.iucnredlist.org/technical-documents/classification-schemes)
Habitat
Season
Suitability
Major
Importance?
0. Root -> 6. Rocky areas (eg. inland cliffs, mountain peaks)
-
Suitable
-
Threats
(http://www.iucnredlist.org/technical-documents/classification-schemes)
Threat
Timing
Scope
Severity
Impact Score
11. Climate change & severe weather -> 11.2.
Droughts
Ongoing
-
-
-
Stresses:
1. Ecosystem stresses -> 1.2. Ecosystem degradation
2. Species Stresses -> 2.1. Species mortality
Research Needed
(http://www.iucnredlist.org/technical-documents/classification-schemes)
Research Needed
1. Research -> 1.1. Taxonomy
© The IUCN Red List of Threatened Species: Helichrysum sp. nov. D – published in 2004.
http://dx.doi.org/10.2305/IUCN.UK.2004.RLTS.T44841A10952668.en
5
The IUCN Red List Partnership
The IUCN Red List of Threatened Species™ is produced and managed by the IUCN Global Species
Programme, the IUCN Species Survival Commission (SSC) and The IUCN Red List Partnership. The IUCN
Red List Partners are: BirdLife International; Botanic Gardens Conservation International; Conservation
International; Microsoft; NatureServe; Royal Botanic Gardens, Kew; Sapienza University of Rome; Texas
A&M University; Wildscreen; and Zoological Society of London.
THE IUCN RED LIST OF THREATENED SPECIES™