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15 results for “Leucheria”
FIGURE 1 in Morphology and morphometry support a single species in the Leucheria cerberoana species complex (Asteraceae, Nassauvieae)
FIGURE 1. Phyllaries and pappus of the species of Leucheria under study. a. Capitulum transection showing two florets tightly enclosed by an inner enfolding phyllary (arrows) (LP 6022). b. Marginal floret tightly enclosed by an outer keeled phyllary and an enfolding inner phyllary (Barros 2653, LP). c. Short pappus of marginal floret (Zöllner 3682, LP). d. Long pappus of central floret (Zöllner 3682, LP). Scale bars: a = 375 µm; b = 3 mm; c–d = 0.5 mm.
FIGURE 3 in Morphology and morphometry support a single species in the Leucheria cerberoana species complex (Asteraceae, Nassauvieae)
FIGURE 3. Character variation of Leucheria specimens in multivariate space based on Principal Coordinate Analysis (PCoA) and K- means. a. Distribution of individual specimens (circles) in multivariate space (first three PCoA axes). The different colors represent different species to which the specimens were assigned. b. Characters (vectors) accounting for most variation of the first three PCoA axes (correlations greater than 0.5 and lower than -0.5). c. Number of clusters vs. within sum of squares resulting from K-means. BASA = blade abaxial surface araneose, BASL = blade abaxial surface lanose, BP = blade pinnatisect, BS = blade slightly partite, LLR = lower leaves rosulate, PP = phyllary pubescence, PT = peduncle thickened, PNT = peduncle non-thickened, SP = stem pubescence.
FIGURE 2 in Morphology and morphometry support a single species in the Leucheria cerberoana species complex (Asteraceae, Nassauvieae)
FIGURE 2. Transection of underground organs of the species of Leucheria under study. a. Root with secondary growth (Jiles 2292, LP). b. Detail of the cortex (Ricardi & Marticorena 4990, LP). c. Detail of the vascular cylinder (Jiles 2292, LP). d. Rhizome of Leucheria gilliesii, shown for comparison with the species under study; note the development of the parenchyma in cortex and pith (in light blue) (Boelcke et al. 12914, LP). e. Structure showing intermediate characteristics between a rhizome and a root with secondary growth; note the development of the parenchyma in cortex and pith (in light blue) (Mahu 1039, LP). f. Detail of the previous structure showing the endodermis; note the lignified strips in the radial walls (Mahu 1039, LP). (co = cortical; cor = cork; par = parenchyma; phd = phelloderm; phg = phellogen; sec phl= secondary phloem; sec xyl = secondary xylem; vas cam= vascular cambium). Scale bars: a = 0.25 mm; b = 40 µm; c = 125 µm; d = 0.6 mm; e = 2mm; f = 87.5 µm.
FIGURE 2 in A new species of the genus Leucheria (Asteraceae, Nassauvieae) from Argentina
FIGURE 2. Cluster analysis using Euclidean distance of 11 morphological characters of 16 taxa of the genus Leucheria. Red lines indicate the three species studied. Roman numerals indicate the three clades with different morphological characteristics. Blue line shows significantly different clades.
FIGURE 1 in A new species of the genus Leucheria (Asteraceae, Nassauvieae) from Argentina
FIGURE 1. Phylogenetic reconstruction of the genus Leucheria and representatives of the Tribe Nassauvieae using Bayesian Inference with nuclear and plastid regions. Posterior probability values are found above the branches. Asterisks indicate nodes without support (>0.90). The principal clades are denoted by letter A (acaulescent/subacaulescent species with solitary capitula) and B (caulescent species with numerous capitula). Subclades (Sc) are denoted by roman numerals (I, II, III) (figure from Jara-Arancio et al. 2017). Red branches indicate the species studied.
FIGURE 4 in A new species of the genus Leucheria (Asteraceae, Nassauvieae) from Argentina
FIGURE 4. Holotype of Leucheria diemii var. purpurea deposited in the Gaspar Xuarez herbarium (BAA), now renamed as L. arancioi.
FIGURE 3 in A new species of the genus Leucheria (Asteraceae, Nassauvieae) from Argentina
FIGURE 3. Polymorphic sites of 16 pairs of taxa of the genus Leucheria with three regions: ITS (A), trnF-trnL (B) and rpl32-trnL (C). L. arancioi = L. diemii var. purpurea.
Supplementary material 1 from: Lavandero N, Rosende B, Pérez MF (2020) Leucheria cantillanensis (Nassauvieae, Asteraceae), a new species endemic to Central Chile. PhytoKeys 169: 99-117. https://doi.org/10.3897/phytokeys.169.57532
Table S1. GenBank accession numbers used in this study
Figure 7 from: Lavandero N, Rosende B, Pérez MF (2020) Leucheria cantillanensis (Nassauvieae, Asteraceae), a new species endemic to Central Chile. PhytoKeys 169: 99-117. https://doi.org/10.3897/phytokeys.169.57532
Figure 7 Habitat of Leucheria cantillanensis in Central Chile A southwest facing rock outcrops, ca. 2000 m elevation B rock outcrops in Cantillana, general view C general view of rock outcrops among Nothofagus macrocarpa (A.DC.) F.M. Vázquez & R.A. Rodr. forests in the Cantillana plateau DLeucheria cantillanensis, detail of the plant growing between rock crevices. Photographs A, D by Lavandero, B, C by Fabiola Gamboa.
Figure 6 from: Lavandero N, Rosende B, Pérez MF (2020) Leucheria cantillanensis (Nassauvieae, Asteraceae), a new species endemic to Central Chile. PhytoKeys 169: 99-117. https://doi.org/10.3897/phytokeys.169.57532
Figure 6 Leucheria salina (A, D, G, J) (Valle Nevado, Región Metropolitana, Chile), Lecheria runcinata (B, E, H, K) (Reserva Natural Altos de Cantillana, Región Metropolitana, Chile), and Leucheria cantillanensis (C, F, I, L) (Reserva Natural Altos de Cantillana, Región Metropolitana, Chile) A–C habit D–F capitula G–I abaxial side of leaves J–L belowground structures. All Photographs by Lavandero.
Figure 5 from: Lavandero N, Rosende B, Pérez MF (2020) Leucheria cantillanensis (Nassauvieae, Asteraceae), a new species endemic to Central Chile. PhytoKeys 169: 99-117. https://doi.org/10.3897/phytokeys.169.57532
Figure 5 Leaf morphology and habit of acaulescent/subacaulescent Leucheria from Central Chile ALeucheria scrobiculata (NL433, CONC), inset: Habit BLeucheria candidissima (Lavandero, Santilli & Ossa 36, CONC), inset: Habit CLeucheria salina (Lavandero & Abello 40, CONC), inset: Habit DLeucheria cantillanensis (NL700, CONC), inset: Habit. All photographs by Lavandero.
Figure 4 from: Lavandero N, Rosende B, Pérez MF (2020) Leucheria cantillanensis (Nassauvieae, Asteraceae), a new species endemic to Central Chile. PhytoKeys 169: 99-117. https://doi.org/10.3897/phytokeys.169.57532
Figure 4 Leucheria cantillanensis Lavandero, sp. nov. A habit B capitulum C detail of flower D fruit E basal leaf F leaf trichome G stem trichome H inner Middle involucral bract I middle Middle involucral bract J outer Middle involucral bract K ciliate margin of inner Middle involucral bract (detail). Illustrations by Benito Rosende.
Figure 3 from: Lavandero N, Rosende B, Pérez MF (2020) Leucheria cantillanensis (Nassauvieae, Asteraceae), a new species endemic to Central Chile. PhytoKeys 169: 99-117. https://doi.org/10.3897/phytokeys.169.57532
Figure 3 Leucheria cantillanensis Lavandero, sp. nov. A capitulum, sideways view B capitulum, detail of Middle involucral bracts C leaves D capitulum, upper view E plants growing in natural habitat F cypsela G detail of trichomes in cypsela. All photographs by Nicolás Lavandero.
Figure 2 from: Lavandero N, Rosende B, Pérez MF (2020) Leucheria cantillanensis (Nassauvieae, Asteraceae), a new species endemic to Central Chile. PhytoKeys 169: 99-117. https://doi.org/10.3897/phytokeys.169.57532
Figure 2 Phylogeny of Leucheria resulting from Bayesian analysis of the combined nuclear ITS and plastid rpl32-trnL and trnL-trnF dataset. Numbers above and below the branches represent the Posterior probabilities from the BI analysis and bootstrap values from the ML analysis, respectively. Nodes with <0.5 PP were collapsed to polytomies. The new species, Leucheria cantillanensis is highlighted in bold.
Figure 1 from: Lavandero N, Rosende B, Pérez MF (2020) Leucheria cantillanensis (Nassauvieae, Asteraceae), a new species endemic to Central Chile. PhytoKeys 169: 99-117. https://doi.org/10.3897/phytokeys.169.57532
Figure 1 Distribution map of Leucheria cantillanensis (star) in Chile, Región Metropolitana, based on the type locality.
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