Guimaraes P.J.F.,Institute Pesquisas Jardim Botanico Do Rio Of Janeiro |
Da Silva M.F.O.,Escola Nacional de Botanica Tropical
Phytotaxa | Year: 2015
Pleroma ceciliana,a new species of Melastomataceae (Melastomeae) from Rio de Janeiro State, Brazil, is described, illustrated and compared to its putative closest relatives. It is characterized mainly by the stamens dimorphic in size with the appendages covered with stipitate glands, leaf blades with the base rounded and slightly truncate, and 3+2 nerves with the marginal pair 1–2 mm suprabasal. © 2015 Magnolia Press.
Lima J.R.,Escola Nacional de Botanica Tropical |
Mansano V.F.,Institute Pesquisas Jardim Botanico Do Rio Of Janeiro |
Araujo F.S.,Federal University of Ceara
Journal of Systematics and Evolution | Year: 2012
Many studies are based on the premise that, on a local scale, diversity is the result of ecological processes, whereas on a regional scale factors such as the topography, geology, hydrology, and historical and evolutionary events would influence this control. The Baturité Mountain Range (Ceará state), located in the Brazilian semi-arid zone, is considered an area of extreme importance for conservation with its vegetation varying with the altitude and slope (windward vs. leeward). On the windward (wet) slope, rainforest dominates, whereas the leeward (dry) slope is dominated by seasonal forests and thorny woodland. The aim of this study was to contribute to the knowledge of the patterns of richness and diversity of the family Leguminosae on a local scale (Baturité Mountain Range) as well as a regional scale (northeastern Brazil). The two slopes present quite distinct floras. The dry slope presents higher richness and diversity indices for Leguminosae than the wet slope. The highest diversity of Leguminosae in the dry areas did not corroborate the ideas of other studies carried out in neotropical forests (total flora) that the higher species richness was predicted for wet areas. The present study indicates that the historical and evolutionary processes influence the diversity patterns on a local scale (Baturité Mountain Range), as well as on a regional scale (Brazilian semi-arid). Our results reinforce the uniqueness of each portion of this area and its importance for conservation. © 2012 Institute of Botany, Chinese Academy of Sciences.
De Oliveira J.A.,Escola Nacional de Botanica Tropical |
Salimena F.R.G.,Federal University of Juiz de fora |
Zappi D.,Royal Botanic Gardens
Rodriguesia | Year: 2014
As part of the floristic studies of the Serra Negra, located at the southern end of the Minas Gerais in Zona da Mata region and included in the Mantiqueira mountain range, this study of the family Rubiaceae comprises 26 genera and 48 species. The most diverse genus is Psychotria, with 12 species, followed by Borreria (5), Coccocypselum (4), Manettia (3), Margaritopsis (2) and Palicourea (2), while Alseis, Amaioua, Bathysa, Chomelia, Cordiera, Coussarea, Coutarea, Diodia, Emmeorhiza, Faramea, Galianthe, Galium, Guettarda, Hillia, Hindsia, Ladenbergia, Posoqueria, Remijia, Rudgea and Schizocalyx are representaded by a single species each. Psychotria pallens was found for the first time in Minas Gerais, and a new locality for narrow endemic and endangered Hindsia ibitipocensis, known until now only for the Parque Estadual do Ibitipoca. Identification keys, descriptions, illustrations and comments on the taxonomy, ecology and distribution of the species are provided.
Gonzaga D.R.,Escola Nacional de Botanica Tropical |
Neto L.M.,Federal University of Juiz de fora
Check List | Year: 2015
We present the first record of Rhipsalis oblonga in Minas Gerais state, Brazil. This record suggests that this species, having a global rank of Vulnerable, is nevertheless threatened in Minas Gerais with extirpation due to the small area of occupancy that is outside of any conservation unit. We present morphological data for this species and comment on its ecology and distribution. © 2015 Check List and Authors.
Filardi F.L.R.,Escola Nacional de Botanica Tropical |
Filardi F.L.R.,Institute Pesquisas Jardim Botanico Do Rio Of Janeiro |
De Lima H.C.,Institute Pesquisas Jardim Botanico Do Rio Of Janeiro |
Klitgaard B.B.,Herbarium |
Sartori A.L.B.,Federal University of Mato Grosso do Sul
Brittonia | Year: 2013
Machaerium sect. Lineata, with around 30 species of trees, shrubs and lianas, occurs from southern Mexico to northern Argentina and is characterized by the presence of spinescent stipules and leaflets with cladodromous venation. The difficulty of distinguishing species in this section is compounded by a proliferation of taxonomic names. The taxonomy, morphology, and geographic distribution of Machaerium hirtum and four allied species of section Lineata were investigated. The results include the circumscription of the M. hirtum alliance to include M. aculeatum, M. eriocarpum, M. hirtum, M. isadelphum, and M. sericiflorum, as well as two basionyms and 26 synonyms (of which 11 are listed here for the first time), and the designation of the neotype of M. sericiflorum, the lectotypes of M. angustifolium, M. angustifolium var. β, M. angustifolium fo. glauca and M. armatum, and the epitype of M. hirtum. In addition to the wide variation and overlap of certain morphological characters, the problems in the circumscription of this complex may also be related to their broad distribution range, which corresponds to that known for the genus as a whole. Vegetative and reproductive characters were used to delimit the five species. Among the important characters are the dimensions and indumentum of the leaflets, bracteoles, calyx, and banner petal, and the presence of diadelphous stamens. Machaerium isadelphum and M. hirtum have the largest geographic range, while M. eriocarpum is restricted to southwestern South America and M. aculeatum and M. sericiflorum are endemic to Brazil. Identification keys, descriptions, illustrations, geographic distributions, and habitat are used to distinguish the species. © 2012 The New York Botanical Garden.