True axillary inflorescences in Rudgea (Palicoureeae, Rubiaceae), a newly reported characteristic of two new Brazilian species, R. quisquiliae and R. axilliflora (original) (raw)
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A new species of Rudgea (Palicoureeae, Rubiaceae) from Espírito Santo state, Brazil
Phytotaxa, 2018
A new endemic and critically endangered species of Rudgea (Rubiaceae) from Southeastern Brazil is described and illustrated. Rudgea minutifolia Bruniera & Torres-Leite is distinguished by its small leaves, a character found in only a handful of species in this genus. The indumentum of the branches, leaves and stipules, low number of secondary veins, corniculate corolla lobes, and vinaceous to almost black mature fruits are also characteristic of this species. Discovered in a forest remnant within the Atlantic Rainforest domain in the south of Espírito Santo state, this species is found only in the municipality of Castelo, an area that has been recognized as prioritary for conservation. Besides the description, taxonomic comments, conservation status, images and illustrations are provided.
Rodriguésia, 2012
The Rubiaceae is the fourth Angiosperm family in number of species in the World and in the Neotropics. Its overwhelming diversity and presence in most biomes, and at most vegetation layers, makes this family one of the most important components of tropical vegetation. During the last two decades, family classification went through several reorganizations, mostly influenced by the advent of molecular phylogenetic studies, and many taxonomic revisions and floristic studies on Brazilian Rubiaceae have become available. In view of the considerable amount of literature that has recently been produced on Neotropical Rubiaceae, the present work has two main objectives: the first is to offer an overall view of the most recent family classification with emphasis on the genera of Rubiaceae occurring in Brazil, and to indicate particular taxa that are still in need of phylogenetic and taxonomic studies; the second objective is to present a short discussion on the state of floristic and taxonomic knowledge with respect to the various regions of Brazil, indicating the taxa and the geographic areas that need to be studied.
Synopsis of Rubiaceae from the Iguaçu National Park, Paraná, Brazil
Rodriguésia, 2021
Iguaçu National Park represents the largest fragment of Inland Atlantic Rainforest of Paraná state. The vegetation is predominantly seasonal semideciduous forest, in the areas of Foz do Iguaçu and Capanema and a transition of this with Araucaria forest, in the Céu Azul area. This work aimed to recognize the genera and species of Rubiaceae occurring in the Park, through monthly collections from August 2013 to July 2014, supplemented with sporadic collections from May 2018 to April 2019. Thirty-five species were recorded, belonging to 19 genera. The most representative genera were Palicourea and Psychotria with five species, Galianthe, Manettia, Borreria with three, Geophila and Coccocypselum with two, and the other genera with only one species each. The areas with the major species richness were Foz do Iguaçu, with 24, of which four are exclusive to this area, followed by Céu Azul with 22 species, of which eight are exclusive. Of the 35 species recorded, seven occur in all areas and ...
Brazil holds most of the Atlantic Forest Domain and is also one of the Rubiaceae diversity centers in the Neotropics. Despite the urban expansion in the state of Rio de Janeiro, large areas of continuous vegetation with high connectivity degree can still be found. Recently, new Rubiaceae species have been described in the Rio de Janeiro flora, which present small populations and very particular distribution. The current paper analyzed the similarity in the floristic composition of the Rubiaceae in eight Atlantic Forest remnants of Rio de Janeiro state protected by Conservation Units. We also surveyed and set guidelines for conservation of microendemic species. The similarity analysis were based on previously published studies in Área de Proteção Ambiental de Grumari, Área de Proteção Ambiental Palmares, Parque Estadual da Serra da Tiririca, Parque Nacional do Itatiaia, Parque Nacional de Jurubatiba, Reserva Biológica de Poço das Antas, Reserva Biológica do Tinguá and Reserva Ecológica de Macaé de Cima-using the PAST software (" Paleontological Statistics ") with Sørensen coefficient. The floristic similarity analysis revealed two groups with distinct physiographic characteristics and different vegetation types. Group A consisted in two Restinga areas, Área de Proteção Ambiental de Grumari and Parque Nacional de Jurubatiba, which showed strong bootstrap support (98 %). Group B included forest remnants with distinct phytophisiognomies or altitudes, but with moderate bootstrap support. Low similarity levels among the eight areas were found due to the habitats' heterogeneity. The current study pointed out 19 microendemic species from the Atlantic Forest, they present a single-site distribution or a distribution restricted to Mountain and Metropolitan regions of Rio de Janeiro state. Concerning the conservation status of microen-demic species, discrepancies between the Catalogue of Flora of Rio de Janeiro and the Red Book of Brazilian Flora (two of the main reference catalogs of Brazilian flora) have been identified. We have also highlighted the need for recollecting microendemic species from the Atlantic Forest, and for properly assessing the degree of threat faced by these taxons early. Rev. Biol. Trop. 64 (2): 655-665. Epub 2016 June 01.
The Rudgea hostmanniana complex (Rubiaceae) in the Guiana Shield region
Phytotaxa
A taxonomic revision of the Rudgea hostmanniana complex in the Guiana shield region is presented. This group includes species with sheathing stipules bearing dorsal appendages, thick glabrous leaves lacking domatia, inflorescences thyrsoid to glomerulate but not regularly dichotomous, a calyx tube absent or very short, a corolla tube 2–7(–13) mm long, and fruits usually brownish when immature and turning red or orange at maturity. Eight species are recognized, among which Rudgea billietiae, endemic to Kaw Mountain in French Guiana, is newly described and illustrated; it is assessed as Endangered according to IUCN criteria. The other species are R. bolivarensis, R. cornigera, R. coussareoides, R. hostmanniana, R. maypurensis, R. pungens, and R. tanaosepala. A key to the species is presented, as well as a table summarising their diagnostic characters.
Revista Brasileira de Botânica, 2010
-(Floral attributes, ornithophily and reproductive success of Palicourea longepedunculata (Rubiaceae), a distylous shrub in southeastern Brazil). Floral attributes, ornithophily and reproductive success of Palicourea longepedunculata Gardner were studied in a fragment of the Atlantic Forest in southeastern Brazil. This species is a distylous shrub that occurs in wet forest understory. In an area of seven hectares, the frequency of the morphs was found at a ratio very close to the expected 1:1. The fl owering period extended from March (end of the rainy season) to September, with a fl owering peak in May/June (dry season). The fl oral attributes of the morphs were similar, i.e., the fl owering of the fl oral morphs was synchronous, and the numbers of infl orescences per plant, fl owers per infl orescence, open fl owers per infl orescence and per plant of the fl oral morphs were similar. The pollen grains of the morphs presented similar sizes, as well as their viability. Palicourea longepedunculata is self-incompatible and mainly pollinated by Phaethornis rubber (Aves, Trochilidae), which accounted for 62.07% of the foraging bouts. The reproductive success was similar between morphs: the numbers of fruits per infl orescence were, in average, 85.7 (L-morph) and 107.1 (S-morph) and there was no signifi cant difference in the production of seeds (one or two) per fruit between the morphs. Fruits were similar in height, width and weight. Key words-Atlantic forest, fl owering phenology, hummingbirds, Palicourea, Phaethornis RESUMO-(Atributos fl orais, ornitofi lia e sucesso reprodutivo de Palicourea longepedunculata (Rubiaceae), um arbusto distílico no sudeste do Brasil). Os atributos fl orais, a ornitofi lia e o sucesso reprodutivo de Palicourea longepedunculata Gardner foram estudados em fragmento de Floresta Atlântica do sudeste do Brasil. Essa espécie é um arbusto distílico que ocorre em sub-bosque úmido de fl orestas. Em uma área de sete hectares, os indivíduos dos morfos brevistilo e longistilo foram encontrados em uma taxa muito próxima da esperada, 1:1. O período de fl oração estendeu-se de março (fi nal da estação chuvosa) a setembro, com um pico em maio/junho (estação seca). Os atributos fl orais dos morfos foram similares, isto é, a fl oração dos morfos fl orais foi sincronizada e os números de infl orescências por planta, de fl ores por infl orescência, de fl ores abertas por infl orescência e por planta dos morfos foram semelhantes. Os grãos de pólen dos morfos apresentaram tamanho e viabilidade similares. Palicourea longepedunculata é autoincompatível e polinizada principalmente por Phaethornis ruber (Aves, Trochilidae), que realizou 62,07% das ondas de forrageamento. Os morfos apresentaram sucessos reprodutivos similares: os números de frutos por infl orescência foram, em média, 85,7 (longistilo) e 107,1 (brevistilo) e não houve diferença signifi cativa na produção de sementes (uma ou duas) por fruto entre os morfos. Os frutos foram similares em altura, largura e peso.
Inselbergs are granitic and/or gneissic rocky outcrops and, in Brazil, the dome-shaped ones are called sugarloaves (pães de açúcar). They have an extremely specialized vegetation with high levels of endemism. Despite this, they are poorly studied and highly degraded. In northeastern Espírito Santo State, in southeastern Brazil, the Monumento Natural dos Pontões Capixabas (MONAPC) is a federal protected area created to guard some inselbergs threatened by mining, which is one of the main activities in the state. In this work, we provide the first checklist of the rupicolous vascular plant species in this protected area, which is based on field expeditions and searching for occurrence records in virtual herbaria. We recorded 105 species in 36 families and 74 genera that inhabit the vegetation islands on the inselbergs within the official limits of MONAPC. A new species of Pleroma (Melastomataceae) was discovered and, it is being described.
Revista de biología tropical
The reproductive phenology of seven species of Rubiaceae from the Brazilian Atlantic rain forest was compared to evaluate the occurrence of phylogenetic constraints on flowering and fruiting phenologies. Since phenological patterns can be affected by phylogenetic constraints, we expected that reproductive phenology would be similar among plants within a family or genus, occurring during the same time (or season) of the year. Observations on flowering and fruiting phenology were carried out monthly, from December 1996 to January 1998, at Núcleo Picinguaba, Parque Estadual da Serra do Mar, Ubatuba, São Paulo State, Brazil. Nine phenological variables were calculated to characterize, quantify and compare the reproductive phenology of the Rubiaceae species. The flowering patterns were different among the seven species studied, and the Kruskal-Wallis test indicated significant differences in flowering duration first flowering, peak flowering and flowering synchrony. The peaks and pattern...