Infrasectional systematics of the genus Sideritis L. section Sideritis (Lamiaceae) (original) (raw)
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Turkish Journal of Botany
Sideritis L. (Lamiaceae) includes approximately 150 species of annual and perennial plants distributed mainly in the Mediterranean region. In Turkey, 44 species (55 taxa) are native. Three of these species (5 taxa) are annual and these taxa are included in Burgsdorfia and Hesiodia sections. This study was undertaken to investigate the morphological and anatomical properties of 5 annual taxa of Sideritis. Full descriptions and illustrations of these taxa are given, along with some additional information regarding their ecology and phytogeography. The anatomy of the leaf blade, midrib, and stem of the taxa are described and illustrated.
2017
Sideritis vulcanica Hub.-Mor. included in the Empedoclia section of the Lamiaceae family is an endemic species to Turkey and that is vulnerable. Sideritis vulcanica is an endemic, vulnerable and medicinal plant, therefore we focused on this species. In accordance with the new observations, additional information was added to the previous description of this species, and the description was edited. In the anatomical studies, the anatomies of the root, stem and leaf of this species have been enlightened. The shape of the pollen of S. vulcanica has been found as oblate-spheroidal. It has been determined that the polen aperture is trizonocolpate and ornamentation is reticulate. In karyological studies, chromosome counts and karyotype analyses of the species have been done and idyograms have been generated. The somatic chromosome number of S. vulcanica has been found as 2n=32 (x=16). The karyotype formula of this species consists of fourteen median chromosome and two submedian chromosome
Karyological studies of five taxa of Sideritis L. (Lamiaceae) section Hesiodia Benth. from Turkey
Caryologia, 2008
The number and size of the chromosomes in the Sideritis L. genus which belongs to Hesiodia (Benth.) section were studied using the Image Analysis System. Chromosome number was determinated as 2n=30+0-2B in S. lanata L., 2n=28+0-3B in S. romana L. subsp. romana, 2n=28+0-4B in S. curvidens Stapf., 2n=16+0-2B in S. montana L. subsp. montana and 2n=18+0-3B in S. montana L. subsp. remota (d'Urv.) P.W.Ball ex Heywood. The chromosome lengths in these taxa were found to vary from 0.37 µm to 1.33 µm.
Molecular Phylogenetics …, 2002
Sideritis L. (Lamiaceae) comprises approximately 150 species of annuals and perennials distributed chiefly in the Mediterranean region. The majority of the species belong to the continental subgenus Sideritis which is divided into two perennial (Sideritis and Empedoclea) and two annual (Hesiodia and Burgsdorfia) sections. Twenty-three species are woody perennials endemic to the Macaronesian archipelagos of Madeira and the Canary Islands. In an effort to determine the continental origin of the insular group, we constructed independent phylogenies comprising sequence data from both chloroplast and nuclear markers. Sampling included 7 island taxa drawn from the Macaronesian subgenus Marrubiastrum and 25 continental taxa representing all four sections of subgenus Sideritis. Subgenus Marrubiastrum and the two continental perennial sections form well-supported monophyletic groups in both individual and combined analyses. The annual sections are not monophyletic in any analysis; further sampling of annual taxa is needed to resolve these relationships. All analyses identified Sideritis cossoniana, an annual species from Morocco, as the closest continental relative of the Macaronesian group. This contrasts with the hypothesis of earlier workers who suggested that the insular taxa were most closely related to eastern Mediterranean species of the genus. The phylogenies also demonstrate a distinct increase in woodiness among the Macaronesian species relative to their continental congeners, providing further support for the secondary nature of woodiness in island plants. Ó
Botanical Journal of the Linnean Society, 2001
Orophilous taxa of Sideritis sect. Sideritis (Lamiaceae) are rare, although highly diversified in south-eastern Spain. Most of them belong to subsections Hyssopifolia and Fruticulosa and show very reduced distribution areas in the summits of the highest Betic mountains. The inaccessibility of their habitats has meant that many of them have been described only within the last twenty years. In this context, a new species Sideritis tugiensis is described in subsection Hyssopifolia, from the Oromediterranean summits of Sierra de Segura (south-eastern Spain). It is a woody, cushion-shaped plant, resembling both S. carbonellis Socorro (subsect. Hyssopifolia) and S. glacialis Boiss., s.l. (subsect. Fruticulosa), though important morphological divergences warrant recognition at species rank. Data on morphology, ecology and chorology of the new species are reported, and affinities and differences with regard to close taxa from other subsections are presented. Evolutionary trends in the whole aggregate are briefly discussed.
Botanical Journal of the Linnean Society, 1999
Section Sideritis is an extremely diversified group which is formed mainly by species growing at low altitude. The group of high altitude taxa of this section is polyphyletic and has been taxonomically divided in different subsections in which these taxa appear normally associated with low-lying planitiary ones, the latter being the probable ancestors. The subsections comprising high altitude taxa are: subsect. Gymnocarpae, subsect. Fruticulosae; subsect. Hyssopifoliae, subsect. Luridae; subsect. Borgiae and subsect. Aranensis. Most of the high altitude taxa of section Sideritis are endemics with small distribution areas; they are incompletely known and threatened with extinction. The upper altitude limit of this section is attained at over 3000 m in Sierra Nevada (Spain) by Sideritis glacialis Boiss., which has been included in subsect. Fruticulosae Obón and D. Rivera. The taxonomy of this complex group of high altitude endemic taxa of Sideritis subsection Fruticulosae is discussed on the basis of macromorphological and micro-morphological characters. These are used in identification keys and for analysis of dissimilarity. The different habitats, allied species and plant communities are described. The following taxa are recognized: Sideritis glacialis subsp. glacialis, S. glacialis subsp. vestita, S. glacialis subsp. virens and S. glacialis subsp. fontquerii.
Citation: Pellegrini MOO, Faden RB (2017) Recircumscription and taxonomic revision of Siderasis, with comments on the systematics of subtribe Dichorisandrinae (Commelinaceae). PhytoKeys 83: 1–41. https://doi. Abstract A new circumscription and a total of six microendemic species, four of them new to science, are herein presented for Siderasis, based on field and herbaria studies, and cultivated material. We provide an identification key to the species and a distribution map, description, comments, conservation assessment, and illustration for each species. Also, we present an emended key to the genera of subtribe Dichorisandrinae, and comments on the morphology and systematics of the subtribe.