Arenaria bolosii 

Scope: Global
Language: English

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Taxonomy [top]

Kingdom Phylum Class Order Family
Plantae Tracheophyta Magnoliopsida Caryophyllales Caryophyllaceae

Scientific Name: Arenaria bolosii (Cañig.) L.Sáez & Rosselló
Arenaria grandiflora L. ssp. bolosii (Cañig.) Küpfer

Assessment Information [top]

Red List Category & Criteria: Critically Endangered B1ab(iii,v)+2ab(iii,v); C2a(ii) ver 3.1
Year Published: 2006
Date Assessed: 2006-01-31
Needs updating
Assessor(s): Bibiloni, G. & Mus, M.
Reviewer(s): Strahm, W. & de Montmollin, B. (Mediterranean Island Plants Red List Authority)
The area where it is found and the number of individuals are very small, it is known from a single site, and the habitat where it grows as well as the number of mature individuals continues to decline.
Previously published Red List assessments:

Geographic Range [top]

Range Description:This species is only known from a single site on the island of Majorca in the central part of the Tramuntana mountain range.
Countries occurrence:
Spain (Baleares)
Additional data:
Range Map:Click here to open the map viewer and explore range.

Population [top]

Population:Less than 200 individuals grow in one single site covering approximately one hectare.
Current Population Trend:Decreasing
Additional data:

Habitat and Ecology [top]

Habitat and Ecology:This herbaceous perennial is very sensitive to competition from other species and therefore grows in open areas with little soil cover. It is found above an altitude of 900 m on north-facing slopes.

Threats [top]

Major Threat(s): Plant collectors seeking botanical rarities directly threaten this species. In addition, it seems to hybridize with a closely related species, Arenaria grandiflora subsp. glabrescens. Other threats include hikers who trampling the plant, fires, and habitat modification as more people use the area for hiking and camping.

Conservation Actions [top]

Conservation Actions: Actions in Place
Legally: This plant’s habitat is protected by Law 1/1991 of the Parliament of the Balearic Islands as a Natural Site of Special Interest. It is listed as Critically Endangered in the "Lista Roja de la Flora Vascular Española" (Red List of the Spanish Vascular Flora), although this does not confer any specific legal protection.

In situ: No particular measures have been taken.

Ex situ: Seeds of this plant are stored in the seed bank of the Botanic Garden of Sóller, but it is possible that these are hybrids with Arenaria grandiflora subsp. glabrescens.

Actions Needed
This species merits increased legal protection, such as inclusion in the Annexes of the Bern Convention and the EC Habitats Directive. Public access to the site must be controlled. Urgent conservation measures must be taken which include reinforcing the number of plants that remain at this last site and reintroducing the species into other areas where it was previously known.

If the seeds stored in seedbanks are found to be hybrids, any re-introduction campaign using this material will be detrimental to conservation. Genetic studies are therefore needed, and seeds should be collected only when it has been established that they belong to this species.

Citation: Bibiloni, G. & Mus, M. 2006. Arenaria bolosii. The IUCN Red List of Threatened Species 2006: e.T61633A12529922. . Downloaded on 25 April 2018.
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