TY - JOUR T1 - Phylogeny of tribe Mentheae (Lamiaceae): The story of molecules and micromorphological characters JF - Taxon Y1 - 2010 A1 - Hye-Kyoung Moon A1 - Erik Smets A1 - Suzy Huysmans SP - 1065–1076 KW - Anatomy KW - Dna KW - Evolution KW - Inference KW - Labiatae KW - Lamiaceae KW - Mentheae KW - Micromorphology KW - Morphology KW - Nepetoideae Lamiaceae KW - Phylogeny KW - Salvia Lamiaceae KW - Sequence Data KW - Verbenaceae AB - Mentheae are the largest tribe in the family Lamiaceae and economically important, including herbs like mint, sage and thyme. The evolutionary history of this tribe was reconstructed based on ITS and trnL-trnF spacer sequence data of 71 species, representing. 47 out of 65 genera. The resulting phylogeny was used to analyse the distribution of selected morphological characteristics such as sexine ornamentation of pollen, nutlet shape with existence of abscission scar and its form, and trichome types. Two monophyletic groups are recognized, which largely correspond to the current subtribal circumscription. Subtribe Salviinae is monophyletic, including the genus Melissa which was a genus of uncertain affinity in Mentheae. Subtribe Menthinae is not monophyletic since Cleonia, Horminum, Hyssopus, Lycopus and Prunella are more closely related with subtribe Nepetinae. Although we could not detect any morphological synapomorphies for each clade, morphological variation seems to be correlated with the molecular phylogeny. A circular abscission scar without distinct lateral areole occurred mainly in Salviinae, while the majority of the species of Mentheae and Nepetinae had a clear areole at the abscission scar. In addition, a reticulate sexine ornamentation is rather common in the Menthinae clade. VL - 59 ER - TY - JOUR T1 - Phylogenetic significance of leaf micromorphology and anatomy in the tribe Mentheae (Nepetoideae: Lamiaceae) JF - Bot J Linn Soc Y1 - 2009 DO - 10.1111/j.1095-8339.2009.00979.x A1 - Hye-Kyoung Moon A1 - Suk-Pyo Hong A1 - Erik Smets A1 - Suzy Huysmans SP - 211–231 KW - Epidermal Characters KW - Epidermis KW - Essential Oil KW - Evolution KW - Genus KW - Glandular Hairs KW - Labiatae KW - Leaves KW - Monarda-Fistulosa KW - Morphology KW - Phylogenetics KW - Stomata KW - Systematics KW - Trichome KW - Trichomes KW - Vascular Bundle AB - A comparative micromorphological study of leaves was carried out on 102 species of Mentheae; 61 species were selected for the anatomical study. Mentheae possessed both amphistomatic and hypostomatic leaves. The diversity of leaf epidermal characteristics was based on the variation in morphology of epidermal cells, stomata types and trichome types. Although each characteristic on its own has rather limited systematic value, the combination of some of these features may be systematically relevant, especially for the identification of species. For example, branched multicellular nonglandular trichomes were a diagnostic characteristic for all genera investigated of the subtribe Salviinae; however, this trichome type was also observed in Hedeoma ciliolata and Neoeplingia leucophylloides of the subtribe Menthinae. Capitate glandular trichomes with pear-shaped heads were only observed in Salvia dorrii. Subsessile glandular trichomes with multicellular heads (more than ten cells) were an apomorphy for Perovskia. The anatomical leaf structure was consistent throughout the tribe. In some species, the vascular bundles in the midrib were modified into a mechanical tissue, which is an adaptation to xerophytic environments. The observed variations are discussed in an ecological context and their phylogenetic significance is evaluated. (C) 2009 The Linnean Society of London, Botanical Journal of the Linnean Society, 2009, 160, 211-231. VL - 160 ER - TY - JOUR T1 - Using amplified fragment length polymorphism (AFLP) to unravel species relationships and delimitations in Minthostachys (Labiatae) JF - Bot J Linn Soc Y1 - 2007 A1 - Alexander N Schmidt-Lebuhn SP - 9–19 KW - Andes KW - Constituents KW - Evolution KW - Genetic-Variation KW - Lamiaceae KW - Markers KW - Mentheae KW - Morphology KW - Neotropical KW - Plants AB - Minthostachys (Benth.) Spach (Labiatae) is a South American genus of aromatic shrubs frequently collected as a condiment, for the preparation of tea, or for medicinal purposes. Notoriously difficult species delimitation, conflicting taxonomic treatments of the past, and the lack of a revision with modern methods have hampered the understanding of this ecologically and economically interesting group. The amplified fragment length polymorphism (AFLP) study presented in this paper supplements field and morphological studies within the framework of a taxonomic and systematic revision. AFLP is found to be unsuitable for the reconstruction of the phylogeny of Minthostachys. Although, in some cases, morphologically well-defined species are also genetically distinct, extensive gene flow seems to occur between strikingly different species growing in the immediate vicinity and even between Minthostachys and Clinopodium (Xenopoma) vanum. Samples from the most complicated species, M. mollis, are genetically very heterogeneous and mostly fall into two clusters according to their geographical origin, exhibiting a high discrepancy with the pattern of morphological variation. (c) 2007 The Linnean Society of London, Botanical Journal of the Linnean Society, 2007, 153, 9-19. VL - 153 ER -