José Fernando A. Baumgratz

Taxonomia de Melastomataceae no Brasil: retrospectiva, perspectivas e chave de identificação para os gêneros

In this paper we present a historical framework on the study of Melastomataceae taxonomy in Brazil. We also present a discussion of the circumscriptions of the taxa, and of geographic distribution of the genera, as well as the impact of new tools (like molecular markers and phylogeny) on taxonomic knowledge of the family. Finally, we discuss perspectives for future studies, also indicating some gaps that must be filled in order to improve our knowledge of the diversity of Brazilian Melastomataceae. We present an identification key for the genera occurring in Brazil.

Palynotaxonomy of Passiflora L. subg. Decaloba (DC.) Rchb. (Passifloraceae) in Brazil

The palynological study of 21 taxa of Passiflora L. subg. Decaloba (DC.) Rchb. (Passifloraceae) in Brazil aimed to contribute to a better characterization, as well as the circumscription and delimitation of the subgenus, species and subspecies. The pollen grains were acetolysed, measured, described and illustrated using light microscopy and scanning electron microscopy. The taxa have large or medium-sized pollen grains, isopolar, prolate spheroidal, oblate spheroidal, spheroidal or suprolate, 12-colpate, 12-colporate or 6-colporate, 3 or 6 mesocolpes, and presence or absence of opercules, pseudopercules and secondary opercules, microreticulate (P. truncata) and heteroreticulate exine in the other species. An identification key with pollen characteristics is presented, showing the importance of pollen characteristics for Passiflora taxonomy.

Palinotaxonomia das espécies de Passiflora L. subg. Decaloba (DC.) Rchb. (Passifloraceae) no Sudeste do Brasil

The palynotaxonomic study of eight species Passiflora L. subg. Decaloba (DC.) Rchb. (Passifloraceae) aimed to contribute to a better characterization, as well as the circumscription and delimitation of this subgenus in Southeastern Brazil. The pollen grains were acetolysed, measured, described, and illustrated using light microscopy. For details observations of surface and aperture, pollen grains not acetolysed were analyzed in scanning electron microscopy (SEM). The data obtained were statistically analyzed according to size of the samples. The species analysed in this study own large or mediun sizes pollen grains, isopolar, prolate spheroidal, spheroidal or subprolate, 12-colporate, 12-colpate for P. suberosa L., or 6-colporate, with pseudopercules, heteroreticulate exine. An identification key with pollinic characters is presented.

Melastomataceae na Reserva Ecológica de Macaé de Cima, Nova Friburgo, Rio de Janeiro, Brasil. II - Leandra (Miconieae)

Apresenta-se o estudo taxonomico do genero Leandra na Reserva Ecologica de Macae de Cima, tendo sido reconhecidas 35 especies e tres novos sinonimos, alem da designacao de tres lectotipos. Constam uma chave para a identificacao das especies, descricoes, ilustracoes, dados de distribuicao geografica e comentarios sobre particularidades taxonomicas e morfologicas. Leandra aspera, L. atroviridis, L. eriocalyx, L. laxa, L. mollis, L. multisetosa, L. sphaerocarpa e L. tetragona sao endemicas de Macae de Cima e, juntamente com L. altomacaensis, L. breviflora, L. hirta var. hirta e L. magdalenensis, endemicas do estado fluminense. Leandra altomacaensis, L. glazioviana, L. riedeliana e L. truncata representam novas ocorrencias para a Reserva. Leandra aspera, L. atroviridis, L. multisetosa, L. sphaerocarpa e L. tetragona estao sendo ilustradas pela primeira vez.

Sinopse de Huberia DC. (Melastomataceae: Merianieae)

This paper is a synopsis of the genus Huberia which has been recently reviewed. It is a neotropical genus comprising 16 species that occur in the Brazilian Atlantic coast and in the Andean cordillera, from south Ecuador to northwest Peru. The author provides a description of the genus, a key, and nomenclatural types, synonymy, distribution, brief habitat descriptions, vernacular names, and a list specimens examined referring to each species. Taxonomic affinities of the species and systematic position of the genus are commented.

Two new species of Bertolonia (Melastomataceae) from the Brazilian Atlantic Forest

SummaryBertolonia alternifolia and B. bullata, two new endemic species of Melastomataceae from the Atlantic Forest biome of the southern region of Bahia state, Brazil, are described and illustrated based on recent botanical explorations and literature records. The main diagnostic characteristics that distinguish B. alternifolia are alternate leaves with cordate bases, and anthers with terminal-dorsal pores and unappendaged connectives. B. bullata can be identified by having leaves bullate on the adaxial surface, foveolate on the abaxial surface and bases cordate to cordate-lobate, calyx lobes with entire to slightly undulate margins, and stamens dorsally appendaged. Both species are classified as Critically Endangered (CR) and Endangered (EN) respectively.

Nova espécie de Miconia Ruiz & Pav. (Melastomataceae) para Minas Gerais, Brasil

A new species of Miconia from Parque Estadual do Ibitipoca, Minas Gerais is described and illustrated - Miconia kriegeriana Baumgratz & Chiavegatto. This species belongs to the section Glossocentrum (Crueger) Hook. and it is characterized by the bullate leaves, bracts and profiles thick and clustered, calyx 4-6-merous and 12-19 stamens. Comments are presented about morphological differences towards related species, including the section Miconia ser. Glomeratiflorae Naudin and ser. Seriatiflorae Naudin.

Baccharis subgen. Molina (Asteraceae) no estado do Rio de Janeiro, Brasil

Baccharis comprises c. 340 species occurring in the Americas. The tufted indumentum, with trichomes having a single adjoining basal cell, and florets functionally unisexual are diagnostic characters of the genus. The Rio de Janeiro state flora contains 55 species of this genus. This work presents the results of taxonomic studies of Baccharis subgen. Molina (Pers.) Heering in Rio de Janeiro state. The subgenus is represented by 18 species belonging to four sections - Caulopterae (8 spp.), Molinae (4 spp.), Baccharidastrum (3 spp.), and Trinervatae (3 spp.). A key for the identification of sections and species, plus morphological descriptions, illustrations, and comments on geographic distribution and ecology are provided. Three species are new records and five are excluded from the state checklist of species.

A New Species of Leandra (Melastomataceae) from Brazil

Abstract Leandra hermogenesii (section Oxymeris), a new endemic species of Melastomataceae from São Paulo, Brazil, is described and illustrated. The distinguishing characteristics of the species include its leaves, which are subcartaceous, ovate to broadly ovate, 5(–7)-plinerved, 5.6–9.6 cm wide, and have a rounded base, its smaller bracts, bracteoles, and glabrous petals , and its larger ovary. A discussion and an identification key to morphologically related species are also presented.

Flora do estado do Rio de Janeiro: avanços no conhecimento da diversidade

O estado do Rio de Janeiro, inserido no Bioma Mata Atlântica, representa uma area com alta diversidade de paisagens vegetacionais, habitats e especies de plantas, incluindo varias endemicas. A flora do estado do Rio de Janeiro e reconhecidamente uma das mais ricas do pais e o estado apontado como um importante centro de endemismo. Tais caracteristicas tem incentivado os mais diferentes estudos botânicos, destacando Vellozo, Cysneiros, Glaziou, Gardner, entre outros, como naturalistas precursores na exploracao das florestas nativas. Apresentam-se, de modo geral, aspectos fisiograficos do estado e uma breve retrospectiva do projeto Flora do estado do Rio de Janeiro, iniciado em 2001, que culminou, em 2007, com a elaboracao online do checklist da flora do estado, e em 2011, com a implantacao do Catalogo de especies de plantas vasculares e briofitas da flora do estado do Rio de Janeiro, no qual mais de 150 colaboradores trabalharam online. Essas iniciativas revelam numeros bem expressivos da diversidade da flora fluminense e a necessidade de se prosseguir nos estudos taxonomicos dos grupos botânicos que compoem a flora. Atualmente, sao registradas para o estado do Rio de Janeiro 334 familias, 1.821 generos e 8.203 especies, subespecies e variedades de plantas vasculares e briofitas, sendo 1.740 endemicas. Destacam-se as formacoes vegetacionais, os municipios, as Unidades de Conservacao e as familias de Angiospermas, Samambaias e Licofitas e Briofitas com maior riqueza de especies, bem como se comenta sobre tratamentos monograficos ja realizados. Este volume especial da Rodriguesia dedicado a flora do estado do Rio de Janeiro apresenta 76 especies de angiospermas distribuidas nas familias Aizoaceae, Alismataceae, Asparagaceae, Ceratophyllaceae, Cabombaceae, Haloragaceae, Hydrocharitaceae, Hydroleaceae, Juncaginaceae, Lentibulariaceae, Mayacaceae, Menyanthaceae, Molluginaceae, Myristicaceae, Nymphaeaceae, Pontederiaceae, Potamogetonaceae, Rhizophoraceae e Typhaceae.