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165 results for “saxifragaceae”
FIGURE 2. Saxifraga hakkariensis. A‒B in Saxifraga hakkariensis (Saxifragaceae), a new species from Hakkâri province (Turkey) belonging to section Porphyrion
FIGURE 2. Saxifraga hakkariensis. A‒B) detail of flowers and inflorescence; C‒F) habitat, habit and basal leaves.
FIGURE 2. Saxifraga luoxiaoensis W. B. Liao, L. Wang & X. J. Zhang. A in Saxifraga luoxiaoensis (Saxifragaceae), a new species from Hunan and Jiangxi, China
FIGURE 2. Saxifraga luoxiaoensis W. B. Liao, L. Wang & X. J. Zhang. A. Habitat; B. adaxial surface of leaves; C. abaxial surface of leaves; D. plants and inflorescence; E. rhizomes and petiole; F. flowers; G. semiannular disc; H. fruits on dry specimen; I. young fruit.
FIGURE 1 in Saxifraga luoxiaoensis (Saxifragaceae), a new species from Hunan and Jiangxi, China
FIGURE 1. Bayesian consensus tree of the new species and related species. Numbers above branches are ML bootstraps, numbers below branches indicate Bayesian posterior probability; the new species is shown in bold.
FIGURE 1 in Saxifraga kegangii (Saxifragaceae), a new species from Hunan province of central China
FIGURE 1. Bayesian consensus tree of the new species and related species. Numbers above branches are ML and MP bootstraps, numbers below branches indicate Bayesian posterior probability; the new species is shown in bold.
FIGURE 3. Saxifraga kegangii D. G. Zhang, Y. Meng & M. H in Saxifraga kegangii (Saxifragaceae), a new species from Hunan province of central China
FIGURE 3. Saxifraga kegangii D. G. Zhang, Y. Meng & M. H. Zhang, sp. nov. A. Habit; B. Flower; C. Fruit; D. Petal; E. Sepal. Drawn from D. G. Zhang et al. BJ4668 (JIU!).
FIGURE 2 in Saxifraga kegangii (Saxifragaceae), a new species from Hunan province of central China
FIGURE 2. Images of living plants of Saxifraga kegangii D. G. Zhang, Y. Meng & M. H. Zhang, sp. nov. A. florets; B. fruits; C. habitat; D. inflorescence; E. lower surface of leaves; F. individuals.
FIGURE 3 in A new species of Saxifraga in section Ciliatae subsection Gemmiparae (Saxifragaceae) from Sichuan province, China
FIGURE 3. Fifty percent strict consensus tree based on the concatenated sequences of trnL-F and ITS from Saxifraga viridipetala and additional 104 Saxifraga species. Numbers on the branches are bootstrap values from maximum parsimony (left) and maximum likelihood (middle) analyses and posterior probabilities (right) from Bayesian inference.
FIGURE 2. Saxifraga viridipetala. a in A new species of Saxifraga in section Ciliatae subsection Gemmiparae (Saxifragaceae) from Sichuan province, China
FIGURE 2. Saxifraga viridipetala. a) whole plant showing cespitose habit; b) stems in vegetative phase with distal leaf rosettes; c) abaxial surface of rosette leaves, showing silvery-striation; d) original photograph of a flower; e) inflorescence with one open flower. Photographs by Qingbo Gao (a, e), Zhenguo Dong (d) and Zhuoxin Zhang (b, c).
FIGURE 1. Saxifraga viridipetala Z-X. Zhang & Gornall. A. Plant. B. Adaxial leaf surface. C. Flower. D. Abaxial sepal surface. E. Adaxial sepal surface. F. Petal. All from the holotype Gao2015006 in A new species of Saxifraga in section Ciliatae subsection Gemmiparae (Saxifragaceae) from Sichuan province, China
FIGURE 1. Saxifraga viridipetala Z-X. Zhang & Gornall. A. Plant. B. Adaxial leaf surface. C. Flower. D. Abaxial sepal surface. E. Adaxial sepal surface. F. Petal. All from the holotype Gao2015006 (HNWP). Drawn by Chen Zhang (Nanjing Xiaozhuang University).
FIGURE 4 in A new species of Saxifraga in section Ciliatae subsection Gemmiparae (Saxifragaceae) from Sichuan province, China
FIGURE 4. Distribution of S. viridipetala (green) and S. gemmipara (red) in southern China. Prepared by R. J. Gornall.
Data from: Tales of the unexpected: Phylogeography of the arctic-alpine model plant Saxifraga oppositifolia (Saxifragaceae) revisited
Arctic-alpine biota occupy enormous areas in the Arctic and the northern hemisphere mountain ranges, and have undergone major range shifts during their comparatively short history. The origins of individual arctic-alpine species remain largely unknown. In the case of the Purple saxifrage, Saxifraga oppositifolia, an important model for arctic-alpine plants, phylogeographic studies have remained inconclusive about early stages of the species' spatiotemporal diversification, but have provided evidence for long-range colonization out of a presumed Beringian origin to cover today's circumpolar range. . We re-evaluated the species' large-scale range dynamics based on a geographically extended sampling including crucial areas such as Central Asia and the (south-)eastern European mountain ranges and employing up-to-date phylogeographic analyses of a plastid sequence and a more restricted AFLP data set. In accordance with previous studies, we detected two major plastid DNA lineages also reflected in AFLP divergence, suggesting a long and independent vicariant history. Although we were unable to determine the species' area of origin, our results point to the Alps and probably Central Asia, respectively, as the likely ancestral areas of the two main clades. AFLP data suggested that contact areas between the two clades in Eastern Europe, Northern Siberia and Greenland were secondary. In marked contrast to high levels of diversity revealed in previous studies, populations from the major arctic refugium Beringia did not exhibit any plastid sequence polymorphism. Our study shows that adequate sampling of the southern, refugial populations is crucial for understanding the range dynamics of arctic-alpine species.
FIGURE 2 in Heuchera lakelae (Saxifragaceae), a new species from the Sierra La Marta and Sierra Coahuilón, Coahuila and Nuevo León, Mexico
FIGURE 2. Occurrence map of Heuchera lakelae (white triangles) and H. sanguinea (gray diamonds). Inset shows the Sierra la Marta and adjacent regions.
FIGURE 1 in Heuchera lakelae (Saxifragaceae), a new species from the Sierra La Marta and Sierra Coahuilón, Coahuila and Nuevo León, Mexico
FIGURE 1. Drawing of H. lakelae, prepared from the type material at NY and TEX by the author. A. Habit and inflorescence; scale represents 4.5 cm. B. Dissected flower; scale represents 6 mm. C. Side view of flower; scale represents 6 mm.
Supplementary data for diversification in the Arctic: biogeography and systematics of the North American Micranthes (Saxifragaceae)
<p>Flora endemic to the cold habitats of the Northern Hemisphere provide important models for investigating diversification and disjunctions, given both the intense climatic fluctuations of these areas in the recent past and the fascinating biogeographic patterns of today's Arctic-alpine plant communities. Micranthes Haw. (Saxifragaceae), a clade of small-flowered herbaceous flowering plants comprising 80 species, is an ideal group for investigating the evolution and diversification of plants in montane and Arctic ecosystems. Micranthes has proven to be a particularly challenging clade to unravel taxonomically due in part to rampant auto- and allopolyploidy, hybridization, and cryptic speciation. With the goal of providing an updated conspectus for this group, we build upon a recent large phylogenomic analysis, to help elucidate the evolution of Micranthes . Here, we present new downstream analyses including diversification analyses, biogeographical reconstructions, and a comparison of methods for dating phylogenomic analyses. To complement these latest analyses, we also synthesize chromosomal variation, new observations regarding morphology and species identification, comprehensive field studies, and an extensive review of the literature for Saxifragaceae and Micranthes. A new perspective on the systematics and taxonomy of Micranthes is provided.</p>
FIGURE 1 in Taxonomic circumscription, new synonym and lectotypification of Saxifraga umbellulata (Saxifragaceae)
FIGURE 1. Distribution of studied taxa: A: Saxifraga umbellulata var. umbellulata, B: Saxifraga umbellulata var. pectinata, C: Saxifraga pasumensis
FIGURE 2 in Taxonomic circumscription, new synonym and lectotypification of Saxifraga umbellulata (Saxifragaceae)
FIGURE 2. Saxifraga umbellulata var. umbellulata: A: habit; B: basal leaf rosette of an individual; C: flower; D: basal leaf rosettes of a population; eciliate and sparsely ciliate leaves marked with yellow arrow.
FIGURE 3 in Taxonomic circumscription, new synonym and lectotypification of Saxifraga umbellulata (Saxifragaceae)
FIGURE 3. Saxifraga umbellulata var. umbellulata: A: habit (note both eciliate and setose ciliate leaves in basal rosette); B: sepal; C–D: petals (spots marked with arrow); E: stamens; F: gynoecium; G: plant architecture in S. umbellulata; H: plant architecture in S. pasumensis. (A–F: drawing from Midday, Ghosh & Maity 22522).
FIGURE 3 in A new natural hybrid in Saxifraga sect. Porphyrion Tausch (Saxifragaceae)
FIGURE 3. Morphology of studied Saxifraga taxa. A–B. S. meeboldii C–E. S. pulvinaria. F–J. S. ×klimesii. A, C, F, H. Overall habit. B. Rosette leaves with pores. D, G. Detail of hypanthium. E, J. Rosette leaves with pores and cilia. I. Petals. Photographs by D. Horák (A), M. Hroneš (B, F, J) and M. Hajman (C–E, G–I).
FIGURE 2 in A new natural hybrid in Saxifraga sect. Porphyrion Tausch (Saxifragaceae)
FIGURE 2. Overall habit of studied Saxifraga species. A. Sympatric growth of S. meeboldii (front), S. pulvinaria (far right) and their hybrid S. ×klimesii (far left) in Zanskar, Ladakh, NW India. B. S. meeboldii. C. S. ×klimesii. D. S. pulvinaria. Photographs by R. Roth (A) and D. Horák (B–D).
FIGURE 1 in A new natural hybrid in Saxifraga sect. Porphyrion Tausch (Saxifragaceae)
FIGURE 1. Biplot of principal component analysis (PCA) of S. meeboldii (red), S. pulvinaria (green), S. ×klimesii (black) and artificial hybrid (blue); cultivated plants are represented by dot, plants from herbaria by triangle. A. PCA of all analysed plants of both cultivated and herbaria origin showing variation in length (Rudel) and width (Rusir) of leaves and number of pores (Pporu) of leaves. Ordination axis 1 explains 42.71 % and ordination axis 2 explains 22.24 % of variance of the sample set. B. PCA of all 10 analysed morphological traits based on cultivated plants only. Ordination axis 1 explains 57.11 % and ordination axis 2 explains 28.81 % of variance of the sample set. Pporu—number of pores, brvy—presence of cilia, Kdel—length of calyx, Ksir—width of calyx, Cdel—length of corolla, Csir—width of corolla, Adel—length of anther, Asir—width of anther.
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