Abstract
Arabis watsonii (P.H.Davis) F.K.Mey. was initially reported as Thlaspi watsonii P.H.Davis in Flora of Turkey. Although F.K.Meyer transferred this species to Arabis L., this species has been overlooked and treated as Thlaspi L. in relevant literature for Flora of Turkey. In this study this species was evaluated using molecular (nuclear ITS and plastidic trnL-F sequences) and morphological data. Results clearly show that Arabis watsonii is sister to the Arabis hirsuta aggregate and its relatives. In conclusion, our results increased the number of known Arabis species in Turkey to 23. Furthermore, detailed description and distribution of the species are given and a new IUCN threat category for Arabis watsonii is proposed.
Highlights
The genus Arabis L. is represented by ca. 60 species and distributed in temperate regions of the northern hemisphere (Koch et al 2010, Al-Shehbaz 2012)
(Koch et al 1999, 2000, 2001, 2010, Al-Shehbaz et al 2011) and subsequently some of the highly supported phylogenetic lineages were described as separate genera, e.g. Scapiarabis M.A
The present study includes for the first time sequences of nuclear ribosomal ITS1, ITS2 and 5.8 S rRNA and trnL(UAA) intron/trnL-trnF intergenic spacer sequence data for Arabis watsonii
Summary
The genus Arabis L. is represented by ca. 60 species and distributed in temperate regions of the northern hemisphere (Koch et al 2010, Al-Shehbaz 2012). 60 species and distributed in temperate regions of the northern hemisphere (Koch et al 2010, Al-Shehbaz 2012). Al-Shehbaz (1988) earlier delimited the genus with ca. (Koch et al 1999, 2000, 2001, 2010, Al-Shehbaz et al 2011) and subsequently some of the highly supported phylogenetic lineages were described as separate genera, e.g. Scapiarabis M.A. Koch, R. M.A. Koch & Al-Shehbaz (Karl et al 2012). Clade etc.) were described (Karl and Koch 2013) Several highly supported Arabis clades (including main Arabis clade, A. alpina L. clade, A. aucheri Boiss. clade etc.) were described (Karl and Koch 2013)
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