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Rivadavia F.,Daniel Burnham Ct | Gonella P.M.,University of Sao Paulo | Sano P.T.,University of Sao Paulo | Fleischmann A.,Botanische Staatssammlung Munich
Phytotaxa | Year: 2014

The species of the affinity of Drosera montana (Droseraceae) are reviewed taxonomically and the complex is redefined to include only D. montana, D. tentaculata, D. tomentosa var. tomentosa, D. tomentosa var. glabrata, and D. spirocalyx. The latter is a newly described narrow endemic species from the Serra do Cipó in central Minas Gerais state, Brazil. The morphological characters distinguishing these five taxa from each other and from other similar species are discussed together with habitat and ecological information. Detailed illustrations, photographs, distribution maps and an identification key are provided. A lectotype for D. tomentosa is here designated. © 2014 Magnolia Press.

Gonella P.M.,University of Sao Paulo | Rivadavia F.,Daniel Burnham Ct | Sano P.T.,University of Sao Paulo | Fleischmann A.,Ludwig Maximilians University of Munich
Phytotaxa | Year: 2014

The Drosera villosa complex is here reviewed and includes six species endemic to Brazil: D. villosa, here identified for the first time as a narrow endemic species native to the neighboring highlands of the Serra Negra and Serra do Ibitipoca, in southern Minas Gerais state; D. ascendens, rediscovered nearly 200 years after its description, narrowly endemic to the Diamantina Plateau, central Minas Gerais; D. graomogolensis, endemic to northern Minas Gerais, but here found to be more widespread than previously reported; D. latifolia, a highly polymorphic and widespread taxon, previously placed in synonymy of D. villosa and heretofore misidentified as D. ascendens, is here elevated to species rank; and two new species here described, D. riparia and D. chimaera. Furthermore, two new natural hybrids are reported: D. villosa × D. tomentosa var. glabrata and D. latifolia × D. tomentosa. The morphological characters distinguishing these taxa from each other and from similar species are discussed, together with habitat and ecological information, detailed illustrations and photographs, distribution maps, and a key to the species of the D. villosa complex is provided. © 2014 Magnolia Press.

Gonella P.M.,University of Sao Paulo | Rivadavia F.,Daniel Burnham Ct | Fleischmann A.,Botanische Staatssammlung Munich
Phytotaxa | Year: 2015

Drosera magnifica, a microendemic sundew discovered on a single mountain top in eastern Minas Gerais (southeastern Brazil), is described here as a new species for science. Regarded as the largest New World sundew and one of the three largest Drosera species, it was just recently discovered through photographs posted on the social network Facebook. A detailed description, remarks on ecology, habitat, and conservation, a distribution map, line drawings, and photographs are provided, as well as a comparison between the related taxa (D. graminifolia and D. spiralis). The species is considered Critically Endangered, according to the IUCN Red List categories and criteria. © 2015 Magnolia Press.

Fleischmann A.,Ludwig Maximilians University of Munich | Schaferhoff B.,University of Munster | Schaferhoff B.,University of Bonn | Heubl G.,Ludwig Maximilians University of Munich | And 4 more authors.
Molecular Phylogenetics and Evolution | Year: 2010

The carnivorous plant genus Genlisea A. St.-Hil. (Lentibulariaceae) comprises at least 22 species distributed in South and Central America as well as in Africa (including Madagascar). It has only recently been shown to be a true carnivore, specialized in protozoa and other small soil organisms. Here we present a statistically highly supported phylogeny of Genlisea based on three chloroplast loci. The most recent common ancestor of Genlisea most likely was of Neotropical origin and characterized by pedicels that are recurved in fruit, a strongly glandular inflorescence, and bivalvate capsule dehiscence. The further evolution of various morphological characters during the diversification of the genus is discussed. The two previously suggested subgenera Tayloria and Genlisea correspond to the two major clades found in our analyses. In subgenus Genlisea, three clades can be clearly distinguished based on molecular and morphological characters and on biogeographic patterns, which led us to propose a new sectional classification. © 2010 Elsevier Inc. All rights reserved.

da Silva N.G.,Federal University of Rio de Janeiro | Alves R.J.V.,Federal University of Rio de Janeiro | Pereira J.F.,Federal University of Rio de Janeiro | Rivadavia F.,Daniel Burnham Ct
Check List | Year: 2011

The Serra de São José is a mountain range within Cerrado (Brazilian savanna) biome, situated in the south of Minas Gerais state, Brazil. The predominant vegetation of the study area is campo rupestre (Brazilian rocky savanna). The latter formation, better known from the Espinhaço Chain, is the scene of many speciation events and comprises several rare species. Thirteen species of the family Lentibulariaceae belonging to the two genera occurring in Brazil are listed, briefly diagnosed, and ecologically commented herein. © 2011 Check List and Authors.

Rivadavia F.,Daniel Burnham Ct. | De Miranda V.F.O.,São Paulo State University | Hoogenstrijd G.,H. Ronnerstraat 50 | Pinheiro F.,Institute Botanica | And 2 more authors.
Annals of Botany | Year: 2012

Background and aimsSouth America and Oceania possess numerous floristic similarities, often confirmed by morphological and molecular data. The carnivorous Drosera meristocaulis (Droseraceae), endemic to the Neblina highlands of northern South America, was known to share morphological characters with the pygmy sundews of Drosera sect. Bryastrum, which are endemic to Australia and New Zealand. The inclusion of D. meristocaulis in a molecular phylogenetic analysis may clarify its systematic position and offer an opportunity to investigate character evolution in Droseraceae and phylogeographic patterns between South America and Oceania.Methods Drosera meristocauliswas included in a molecular phylogenetic analysis of Droseraceae, using nuclear internal transcribed spacer (ITS) and plastid rbcL and rps16 sequence data. Pollen of D. meristocaulis was studied using light microscopy and scanning electron microscopy techniques, and the karyotype was inferred from root tip meristem.Key ResultsThe phylogenetic inferences (maximum parsimony, maximum likelihood and Bayesian approaches) substantiate with high statistical support the inclusion of sect. Meristocaulis and its single species, D. meristocaulis, within the Australian Drosera clade, sister to a group comprising species of sect. Bryastrum. A chromosome number of 2n = approx. 32-36 supports the phylogenetic position within the Australian clade. The undivided styles, conspicuous large setuous stipules, a cryptocotylar (hypogaeous) germination pattern and pollen tetrads with aperture of intermediate type 7-8 are key morphological traits shared between D. meristocaulis and pygmy sundews of sect. Bryastrum from Australia and New Zealand.ConclusionsThe multidisciplinary approach adopted in this study (using morphological, palynological, cytotaxonomic and molecular phylogenetic data) enabled us to elucidate the relationships of the thus far unplaced taxon D. meristocaulis. Long-distance dispersal between southwestern Oceania and northern South America is the most likely scenario to explain the phylogeographic pattern revealed. © The Author 2012. Published by Oxford University Press on behalf of the Annals of Botany Company. All rights reserved.

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