Abstract
The conservation status of Hieracium angustatiforme P.D. Sell & C. West (Asteraceae), Small-leaved Hawkweed, has been assessed. It is a rare endemic restricted to the Brecon Beacons, Wales. Only one population of c.330-430 plants is known in Craig Cerrig-gleisiad National Nature Reserve, and it has not been refound at three other sites. Hieracium angustatiforme is assessed as ‘Critically Endangered’ under IUCN (2001) threat criteria.
Highlights
IntroductionHieracium angustatiforme is a member of Hieracium section Stelligera Zahn which contains over 50 species in Britain and Ireland (Sell & Murrell, 2006)
Hieracium angustatiforme is assessed as ‘Critically Endangered’ under IUCN (2001) threat criteria based on its occurrence in one locality
Endangered, it appears to be under little current threat due to the occurrence on Craig Cerrig-gleisiad National Nature Reserve (NNR)/Brecon Beacons Site of Special Scientific Interest (SSSI) with a favourable grazing regime of extensive cattle grazing, and the population of c.330-430 plants is very healthy
Summary
Hieracium angustatiforme is a member of Hieracium section Stelligera Zahn which contains over 50 species in Britain and Ireland (Sell & Murrell, 2006) It forms a closely related group with H. cacuminum sensu lato in South Wales and H. angustatum (Lindeb.) Lindeb. Ley in having 0-2 stem leaves (4-6 stem leaves in H. cacuminum; Rich & Smith, 2007) It differs from H. angustatum in having few stellate hairs on the bracts (many stellate hairs in H. angustatum; the conspecificity of the Lake District plants with Scandinavian material should be reviewed)
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