Abstract
BackgroundCousinia knorringiae Bornm. (Asteraceae) belongs to C. sect. Subappendiculatae Tscherneva, a group of the species-rich and taxonomically difficult genus Cousinia Cass. This species is narrowly distributed in the Western Tian-Shan and has been known as endemic to Kyrgyzstan. It inhabits bare rocks and screes at elevations of 1200–1500 m above sea level. This species is of conservation interest because of its small population size and limited distribution.New informationCousinia knorringiae is reported for the first time from eastern Uzbekistan on the basis of specimens collected on Ungur-Tepa Mt., a south-western outlier of the Bozbu-Too Mts. (Western Tian-Shan). The conservation status of the species is assessed as Endangered (EN), based on criterion D (estimated population size 200-250 mature individuals), according to the IUCN Red List Categories and Criteria (version 3.1). A new distribution map and a line drawing for C. knorringiae are provided and its type locality is clarified. The new knowledge suggests that the species is endemic to the East Fergana botanical hotspot, which includes a transborder territory shared between Kyrgyzstan and Uzbekistan and should, therefore, be subjected to international conservation measures. The southern extension of Ungur-Tepa Mt. harbours important plant species, which cannot be found elsewhere in Uzbekistan and may, therefore, be proposed for legal protection.
Highlights
The mega-diverse genus Cousinia Cass. (Asteraceae) embraces about 600 species (Susanna and Garcia-Jacas 2006, López-Vinyallonga et al 2009), many of which are closely related and very similar to each other
The new knowledge suggests that the species is endemic to the East Fergana botanical hotspot, which includes a transborder territory shared between Kyrgyzstan and Uzbekistan and should, be subjected to international conservation measures
Central Asia is the main centre of its diversity; according to the classical revisions, ca. 260 species were recorded in the whole territory of Central Asia (Tscherneva 1993) and 133 species were known from Uzbekistan (Tscherneva 1962)
Summary
Subappendiculatae Tscherneva, a group of the species-rich and taxonomically difficult genus Cousinia Cass This species is narrowly distributed in the Western Tian-Shan and has been known as endemic to Kyrgyzstan. It inhabits bare rocks and screes at elevations of 1200–1500 m above sea level. This species is of conservation interest because of its small population size and limited distribution. The new knowledge suggests that the species is endemic to the East Fergana botanical hotspot, which includes a transborder territory shared between Kyrgyzstan and Uzbekistan and should, be subjected to international conservation measures. Central Asia, Compositae, conservation, East Fergana botanical hotspot, IUCN assessment, Kyrgyzstan, narrow endemic, new record, Uzbekistan
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