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Item As Leguminosae arbóreas das florestas estacionais do Parque Estadual do Itacolomi, Minas Gerais, Brasil(Rodriguésia, 2010-07) Garcia, Flávia Cristina Pinto; Lima, Laura Cristina Pires; Sartori, Ângela Lúcia BagnatoriEste estudo consiste do tratamento taxonômico das Leguminosae arbóreas das florestas estacionais do Parque Estadual do Itacolomi (PEI). As coletas de material botânico ocorreram mensalmente, entre setembro de 2004 e novembro de 2005, ao longo de oito trilhas distribuídas em áreas de florestas estacionais submontana, montana e altimontana. O levantamento resultou em 39 táxons reunidos em 22 gêneros e distribuídos entre as três subfamílias: Caesalpinioideae (9 espécies), Mimosoideae (17) e Papilionoideae (13). Os gêneros mais representativos foram Inga (8 espécies), Machaerium (4), Senna e Dalbergia (3, cada), Abarema, Anadenanthera e Tachigali (2, cada). Bauhinia, Cassia, Copaifera, Melanoxylon, Calliandra, Mimosa, Piptadenia, Pseudopiptadenia, Stryphnodendron, Andira, Bowdichia, Ormosia, Platypodium, Pterocarpus e Swartzia apresentaram uma espécie cada. Ormosia friburgensis e Tachigali friburgensis são registradas pela primeira vez para o estado de Minas Gerais. São fornecidos chave de identificação, descrições, ilustrações, dados fenológicos, comentários taxonômicos e preferência por habitats de cada táxon no PEI.Item Miscellaneous new species in the Brazilian Bromeliaceae(Rodriguésia, 2010-01) Ribeiro, Otávio B. C.; Leme, Elton M. C.; Fraga, Claudio Nicoletti de; Kollmann, Ludovic J. C.; Brown, Gregory K.; Till, Walter; Machado, Marlon C.; Monteiro, Fernando J. S.; Fontana, André PaviottiFrom 1990 to 2006, 2,875 new angiosperm species were described in Brazil, including 280 newBromeliaceae species. This publication rate is considered to be a useful indicator of floristic richness andalso reveals the huge gaps in our knowledge of species that make up Brazilian biomes and the importanceof taxonomy as a basic tool to assess biodiversity and conservation. The goal of modern taxonomists is ina race against time ordained by an unprecedented rate of global biodiversity loss, and therefore collaborationis vital to successfully close these gaps. This paper is the result of a broad cooperative research effortundertaken specifically to provide basic data on the identity of new components of Brazilian biologicaldiversity. The authors describe and illustrate 22 new Bromeliaceae species from three subfamilies: Bromelioideae - Aechmea guaratingensis, A. paratiensis, A. rubroaristata, Cryptanthus capitellatus, C. venecianus, C. viridovinosus, Hohenbergia aechmeoides, H. arcuata, H. barbarespina, H. reconcavensis, Nidularium alegrense, Orthophytum teofilo-otonense, O. cearence; Pitcairnioideae - Dyckia espiritosantensis, D. nana, Pitcairnia capixaba; Tillandsioideae - Tillandsia castelensis, Vriesea euclidiana, V. fontanae, V. multifoliata, V. sanctateresensis and V. teresopolitana.Item Diversity of ferns and lycophytes in Brazil(Rodriguésia, 2015) Prado, Jefferson; Sylvestre, Lana da S.; Labiak, Paulo H.; Windisch, Paulo G.; Salino, Alexandre; Barros, Iva C.L.; Hirai, Regina Y.; Almeida, Thaís E.; Santiago, Augusto C. P.; Kieling-Rubio, Maria A.; Pereira, Anna Flora de N.; Øllgaard, Benjamin; Ramos, Carla G. V.; Mickel, John T.; Dittrich, Vinicius A. O.; Mynssen, Claudine M.; Schwartsburd, Pedro B.; Condack, João Paulo S.; Pereira, Jovani B. S.; Matos, Fernando B.This compilation of ferns and lycophytes in Brazil is an update of the one published in 2010 in Catálogo de Plantas e Fungos do Brasil. The methodology consisted in collecting data from regional checklists, taxonomic revisions, and selected databases. Invited specialists improved the list accessing a website housed at the Jardim Botânico do Rio de Janeiro. The results show 1,253 species: 1,111 of ferns and 142 of lycophytes. This number is 6.5% higher than the previous one (1,176 spp.). The percentage of endemic species decreased from 38.2% to 36.7%. We recognized 36 families and 133 genera (vs. 33 families, 121 genera in 2010). The 10 most diverse families are Pteridaceae (196 spp.), Dryopteridaceae (179), Polypodiaceae (164), Hymenophyllaceae (90), Thelypteridaceae (86), Aspleniaceae (78), Lycopodiaceae (64), Selaginellaceae (55), Anemiaceae (51), and Cyatheaceae (45). The three most diverse genera are still Elaphoglossum (87 spp.), Thelypteris (85), and Asplenium (74). The richest phytogeographic domain continues to be in the Atlantic Rainforest with 883 species which also has the largest number of endemic and threatened species, followed by the Amazon Rainforest (503), Cerrado (269), Pantanal (30), Caatinga (26), and Pampa (eight). Minas Gerais remains as the richest state (657 spp. vs. 580 in 2010).Item Morphoanatomy of nectaries of Chamaecrista (L.) Moench sections Chamaecrista, Caliciopsis and Xerocalyx (Leguminosae: Caesalpinioideae)(Acta Botanica Brasilica, 2017-07) Silva, Marinalva dos Santos; Coutinho, Ítalo Antônio Cotta; Araújo, Maicon Nascimento; Meira, Renata Maria Strozi AlvesNectaries are specialized structures that secrete nectar. Several species of Chamaecrista possess nectaries on the petiole, which have been shown to vary widely in morphology and the chemical nature of their secretion. However, a comprehensive investigation of the nectaries of the clade formed by sect. Chamaecrista, Caliciopsis and Xerocalyx has yet to be performed. Our study aimed to confirm whether or not the leaf glands of species of this clade are in fact nectaries, determine the chemical nature of their secretion and expand the morphoanatomical database on leaf nectaries in Chamaecrista with the intention of contributing to the taxonomy and phylogeny of the genus. Samples from herbarium and field-collected material were subjected to standard methods for light and scanning electron microscopy. Four different forms of nectaries were observed: urceolate, patelliform, verruciform and cupuliform. The nectaries were found to comprise a single-layered epidermis, nectary parenchyma, subnectary parenchyma and vascularization. Polysaccharides, lipids, phenolic compounds and proteins were detected in secretions. Although anatomical similarities were observed among the studied species, their morphology differed. Moreover, the glands are indeed nectaries and are similar to those observed in other species of the genus Chamaecrista. These data hold potential taxonomic usefulness for the studied sections.Item Colleters in Chamaecrista (L.) Moench sect. Chamaecrista and sect. Caliciopsis (Leguminosae-Caesalpinioideae): anatomy and taxonomic implications(Acta Botanica Brasilica, 2017-07) Silva, Marinalva dos Santos; Coutinho, Ítalo Antônio Cotta; Araújo, Maicon Nascimento; Meira, Renata Maria Strozi AlvesThe genus Chamaecrista contains ca. 330 species organized into six sections, of which section Chamaecrista is the second largest (ca.75 species) distributed among six series, while the section Caliciopsis contains only two species. Colleters have been described in the genus Chamaecrista and they show potential taxonomic and phylogenetic significance. They are associated with lubrication, desiccation prevention and protection from microbial attacks of young developing organs. Although six types of colleters have been described for the genus Chamaecrista, there have been no studies focusing on the diversity of colleters in the sections Chamaecrista and Caliciopsis. Samples from developing leaves and flowers of both sections were obtained from herbarium and field collections and subjected to standard methodologies for both light and scanning electron microscopy. Histochemical tests were also performed to determine the nature of the exudates. Five types of non-vascularized colleters were found: short digitiform, long digitiform, club-shaped, pyriform and short bottle-shaped. Polysaccharides, pectins, lipids and proteins were detected in the exudates of all types of colleters. Among the five types of colleters observed, pyriform is a novelty for Chamaecrista, reinforcing the significant morphological diversity of these secretory structures in this genus.Item A study of the morphoanatomical characters of the leaves of Chamaecrista (L.) Moench sect. Apoucouita (Leguminosae-Caesalpinioideae)(Acta Botanica Brasilica, 2013-04) Coutinho, Ítalo Antônio Cotta; Rando, Juliana Gastaldello; Conceição, Adilva de Souza; Meira, Renata Maria Strozi AlvesLittle attention has been paid to species of Chamaecrista sect. Apoucouita (Leguminosae-Caesalpinioideae), especially regarding anatomical studies. When only vegetative material is available, the identification of such species may be difficult. Additionally, vegetative material of some species of C. sect. Apoucouita may be even harder to identify because they can resemble species of Inga Mill. (Leguminosae-Mimosoideae). The present study focused on recognizing morphoanatomical characters of leaves that are taxonomically useful for the species of C. sect. Apoucouita by employing standard anatomical techniques. The arrangement of the vascular system in the petiole/rachis, dorsiventral mesophyll, mucilage idioblasts in the epidermis of leaflets and hypostomatic leaves were some of the characters shared by all species studied. Length of the petiole, position and type of extrafloral nectaries, leaflet venation, presence and type of papillae on the epidermis of the leaflet blades and sclereids in the mesophyll were some of the characters useful in the distinction of taxa. The vascular arrangement of the petiole/rachis is a promising character in the distinction of species of C. sect. Apoucouita and Inga. Based on morphoanatomical data, the taxonomic revision of some species and varieties ascribed to C. sect. Apoucouita is suggested.Item Selaginella P. Beauv. from Minas Gerais, Brazil(Acta Botanica Brasilica, 2016-01) Heringer, Gustavo; Valdespino, Iván A.; Salino, AlexandreSelaginella P. Beauv. is the only genus in the family Selaginellaceae Willk. The genus is monophyletic, has a cosmopolitan distribution, contains about 750 species and can be characterized by the presence of rhizophores, leaves, a ligule, heterospory and adaxial, reniform sporangia. Twenty species were found in the study area: Selaginella alstonii, S. contigua, S. convoluta, S. decomposita, S. erectifolia, S. erythropus, S. flexuosa, S. jungermannioides, S. macrostachya, S. marginata, S. microphylla, S. muscosa, S. producta, S. sellowii, S. sematophylla, S. suavis, S. sulcata, S. tenella, S. tenuissima and S. vestiens. Two new species records for the state are presented (S. jungermannioides and S. tenella). We present descriptions of the genus and species, an identification key, the synonyms pertaining to Brazil, illustrations, and comments about the taxonomy and distribution of species in Brazil.Item First record of Juncaceicola as endophytic fungi associated with Deschampsia antarctica Desv.(Diversity, 2018-12) Schmitz, Daniela; Andrade, Guilherme Afonso Kessler de; Cañón, Ehidy Rocio Peña; Alves, Rodrigo Paidano; Schünemann, Adriano Luis; Albuquerque, Margéli Pereira de; Putzke, Jair; Pereira, Antônio Batista; Victoria, Filipe de CarvalhoIn the current study, we present the molecular characterization of an endophyte fungus associated with the leaves of Deschampsia antarctica Desv. (Poaceae), a monocot species native to Antarctica. The isolate was obtained from 90 leaf fragments from two distinct collection sites, both located on Half Moon Island, South Shetland Islands and Maritime Antarctica. The internal transcribed spacer region (ITS) was sequenced and the endophytic fungus was identified as belonging to the genus Juncaceicola Tennakoon, Camporesi, Phook and K.D. Hyde (99% nucleotide sequence identity). When compared to all fungi of the genus Juncaceicola deposited in data base, our isolate showed greater proximity with Juncaceicola typharum, however, because it presents a low bootstrap value to be considered a new species, we treat it as Juncaceicola cf. typharum. Moreover, the identification of our isolate as belonging to the genus Juncaceicola makes this the first occurrence of a species of this genus to be associated with the leaves of Antarctic plants. This work is considered as a starting point for other studies with fungi of this genus associated with leaves of Deschampsia antarctica, as it presents results from two collection points on a single Antarctic island, suggesting that new sites and new Antarctic islands should be explored.Item A taxonomic revision of the south american species of Hypolepis (Dennstaedtiaceae), part I(American Fern Journal, 2015) Schwartsburd, Pedro Bond; Prado, JeffersonHypolepis is a subcosmopolitan genus with ca. 80–90 taxa worldwide, and with few taxonomic studies. The present work is a taxonomic revision of the South American species, including Cocos Island (Costa Rica). It has been based, mainly, on the morphological study of nomenclatural types and exsiccates from European and South American herbaria, plus one herbarium from New Zealand and another from the United States of America. Some species were also studied in nature. For South America (incl. Cocos Island), 26 species are here recognized, and a total of 31 taxa (species, subspecies, varieties, and hybrids). Among these are four new taxa: H. galapagensis, H. 3glabra, H. 3paulistana, and H. pedropaloensis. The geographical distribution patterns were classified into nine categories. Minimum and maximum elevations are strong limiting factors of distribution. The taxonomic treatment includes keys to taxa, new and complete synonymies, typifications, taxa description, distribution maps, illustrations, studied material, and taxonomic and/or nomenclatural comments. In addition, there are short discussions about morphology and biogeography.Item Colleters in 10 species belonging to three tribes of Rubiaceae: morphoanatomical diversity and potential as useful characters for taxonomy(Botany, 2015-07) Otuki, Sara Akemi Ponce; Azevedo, Aristéa Alves; Pereira, Zefa Valdivina; Meira, Renata Maria Strozi Alves; Lopes-Mattos, Karina Lucas BarbosaColleters are common secretory structures in Rubiaceae. In this study, we describe colleter morphoanatomy and histochemistry in 10 species belonging to Chiococceae, Coussareae, and Psychotrieae tribes of Rubiaceae. Colleter morphoanatomy was analyzed by light and scanning electron microscopy. Microscopy analysis revealed that colleters were present on the stipule adaxial surface in all species. In the case of Palicourea marcgravii A.St.-Hil. and Chiococca alba Hitchc., colleters were also found on leaf primordia and at the stipule apex, respectively. Colleters were classified into three types: standard, bifurcated standard, and reduced standard. Further analysis showed that colleter epidermal cells are thin-walled and possess a thin cuticle, conspicuous nuclei located at the equatorial or basal region, and abundant cytoplasm. Intercellular spaces were found among epidermal cells in Chiococca alba, Coussarea triflora Müll.Arg., Coussarea verticillata Müll.Arg., Psychotria conjungens Müll.Arg., and Psychotria sessilis Vell. Crystalliferous idioblasts containing raphides were observed in the colleter central parenchymatous axis of all species, while crystal sand was found only in Chiococca alba. Histochemical tests revealed that colleter secretion is composed of a mixture of mucilage and protein. We conclude that colleter position, typological variation, presence of vascularization, and type of calcium oxalate crystals represent promising characters for future taxonomic and phylogenetic studies in Rubiaceae.