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A new species of Centaurea L. (Asteraceae), Centaurea yildiziiŞ. Civelek, İ. Türkoǧlu & H. Akan (sect. Psephelloideae (Boiss.)) Sosn. is described from Turkey. Diagnostic characters, a description, detailed illustrations and taxonomic comments on the species are given. It is compared with the closely related taxon, Centaurea pyrrhoblephara Boiss. The geographical distribution of the new species and other related species is mapped. © 2003 The Linnean Society of London, Botanical Journal of the Linnean Society, 2003, 143, 207–212.

doi:10.3906/bot-1311-3

In the present study, the fatty acid compositions, vitamin, sterol contents and flavonoid constituents of five Turkish Artemisia species (A. armeniaca, A. incana , A. tournefortiana, A. haussknechtii and A. scoparia) were determined by GC and HPLC techniques. The results of the fatty acid analysis showed that Artemisia species possess high saturated fatty acid compositions. On the other hand, the studied Artemisia species were found to have low vitamin and sterol contents. Eight flavononids (catechin, naringin, rutin, myricetin, morin, naringenin, quercetin, kaempferol) were determined in the present study. It was found that Artemisia species contained high levels of flavonoids. Morin (45.35 ± 0.65 – 1406.79 ± 4.12 μg/g) and naringenin (15.32 ± 0.46 – 191.18 ± 1.22 μg/g) were identified in all five species. Naringin (268.13 ± 1.52 – 226.43 ± 1.17 μg/g) and kaempferol (21.74 ± 0.65 – 262.19 ± 1.38 μg/g) contents were noted in the present study. Present research showed that the studied Artemisia taxa have high saturated fatty acids and also rich flavonoid content.

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