Marcos José da Silva

Manihot appanii (Euphorbiaceae s. s.), a New Species from Brazil, and a Key to the Species with Unlobed or Very Shortly Lobed Leaves

Abstract A new species of Manihot from Brazil was discovered in the course of revising the taxonomy of species of the genus with unlobed or very shortly lobed leaves. Manihot appanii is herein described and illustrated. Its relationships with M. stricta and M. saxatilis, the morphologically most similar species, are discussed, as well as its geographical distribution and conservation status. A key to the species of Manihot with unlobed or shortly lobed leaves is also provided.

A Dwarf Species of Manihot Mill. (Euphorbiaceae s. s.) from the Highlands of Goiás, Brazil

Abstract During the preparation of the Euphorbiaceae taxonomic treatment for the Chapada dos Veadeiros National Park, located in the state of Goiás, Brazil, we found a new species of Manihot. Manihot saxatilis is described and illustrated here. The morphological relationship of this species is discussed in comparison with M. stricta Baill., since we assume this species is the most morphologically similar to the new one. Based on morphological traits, the new species belongs to Manihot sect. Brevipetiolatae. The distribution, habitat, phenology, etymology, IUCN red list category, and a key to all species of Manihot sect. Brevipetiolatae are also provided.

Manihot veadeirensis (Euphorbiaceae s. s.): A New Species from the Brazilian Cerrado

Abstract Manihot veadeirensis, from Chapada dos Veadeiros, Goiás, Brazil, is described, illustrated, and assigned to Manihot section Quinquelobae. This new species is similar to Manihot mossamedensis, differing from it in the gamosepalous calyx of its pistillate flowers, lanceolate, persistent, and uninerved bracts and bracteoles, exserted staminate flowers, and wingless capsules. The distribution, habitat, conservation status, and systematic position of the new species are presented. A key to all species of Manihot section Quinquelobae is also provided.

A New Species of Croton L. (Euphorbiaceae s.s.) from the Brazilian Cerrado

Abstract Croton planaltoanus, a new species from the Brazilian Cerrado, is described and illustrated here. The morphological relationships of this species are discussed in comparison with C. inaequilobus, an endemic species of the Chapada dos Veadeiros Region, which resembles the new species morphologically. The new species is apparently endemic to the Brazilian Cerrado region, where it grows in “cerrado rupestre” and montane grasslands on rocky soils. The systematic position of C. planaltoanus in relation to the sections of Croton is also discussed.

Manihot (Euphorbiaceae s.s.) no Parque Estadual da Serra Dourada, Goiás, Brasil

Resumo O Parque Estadual da Serra Dourada compreende um mosaico vegetacional e e uma das areas serranas mais conservadas do estado de Goias. Com intuito de contribuir com a flora deste parque e com o conhecimento da diversidade das Euphorbiaceae no Cerrado s.l. apresenta-se aqui o tratamento taxonomico do genero Manihot . Foram encontrados 11 taxons, entre eles nove especies e duas subespecies: M. anomala Pohl, M. anomala subsp. pubescens (Pohl) D.J. Rogers & Appan, M. gracilis Pohl, M. irwinii D.J. Rogers & Appan, M. mossamedensis Taub., M. oligantha Pax, M. paviifolia Pohl, M. pentaphylla Pohl, M. pentaphylla subsp. tenuifolia (Pohl) D.J. Rogers & Appan, M. sparsifolia Pohl e M. xavantinensis D.J. Rogers & Appan. Sao apresentados aqui descricoes, chave de identificacao, ilustracoes, distribuicao geografica, alem de comentarios acerca da morfologia e das preferencias ecologicas das especies analisadas. Manihot in Serra Dourada State Park, Goias, Brazil Abstract The Serra Dourada State Park comprises a mosaic of vegetation and it is one the most conserved and diverse mountainous areas of Goias state. To contribute to the flora of this park and with knowledge of Euphorbiaceae diversity in the Cerrado s.l. vegetation a taxonomic treatment of the genus Manihot is presented here. Eleven taxa arranged in nine species were recognized: M. anomala Pohl, M. anomala subsp. pubescens (Pohl) D.J. Rogers & Appan, M. gracilis Pohl, M. irwinii D.J. Rogers & Appan, M. mossamedensis Taub., M. oligantha Pax, M. paviifolia Pohl, M. pentaphylla Pohl, M. pentaphylla subsp. tenuifolia (Pohl) D.J. Rogers & Appan, M. sparsifolia Pohl and M. xavantinensis D.J. Rogers & Appan. Descriptions, illustrations, comments on morphological similarities, geographic distribution and ecological preferences of species, and a key to identify are provided.

Two New Brazilian Species of Phyllanthus (Phyllanthaceae)

Two new Brazilian species of Phyllanthus L. are described and illustrated and their morphological affinities are discussed. Phyllanthus longipedicellatus M. J. Silva resembles P. augustinii Baill. but differs by its leaves oblong-falcate to falcate-asymmetrical with margins obscurely serrulate, and pistillate flowers with patelliform disk. Phyllanthus salesiae M. J. Silva is similar to P. rosmarinifolius Müller Argoviensis but it differs from the latter by its lacerate stipules, deeply lobed pistillate disk, incurved and bifid style, and seeds with darkish punctations. Both species are endemic to Brazil and known only from a single locality. The systematic position of both species with regard to the sections and subsections of Phyllanthus is also discussed. RESUMO . Duas novas espécies de Phyllanthus L. do Brasil são descritas e ilustradas com suas afinidades morfológicas discutidas. Phyllanthus longipedicellatus M. J. Silva assemelha-se a P. augustinii Baill., mas difere desta pelos folhas oblongo-falcadas a falcado-assimétricas com margens discretamente serruladas e flores pistiladas com disco pateliforme. Phyllanthus salesiae M. J. Silva assemelha-se a P. rosmarinifolius Müller Argoviensis do qual difere pelas estı́pulas laceradas, disco pistilado profundamente lobado, estiletes encurvados e bı́fidos e sementes com pontuações enegrecidas. Ambas as espécies são endêmicas para o Brasil, conhecidas de suas respectivas coleções-tipo e têm suas posições sistemáticas discutidas em relação a seções e subseções de Phyllanthus.Two new Brazilian species of Phyllanthus L. are described and illustrated and their morphological affinities are discussed. Phyllanthus longipedicellatus M. J. Silva resembles P. augustinii Baill. but differs by its leaves oblong-falcate to falcate-asymmetrical with margins obscurely serrulate, and pistillate flowers with patelliform disk. Phyllanthus salesiae M. J. Silva is similar to P. rosmarinifolius Muller Argoviensis but it differs from the latter by its lacerate stipules, deeply lobed pistillate disk, incurved and bifid style, and seeds with darkish punctations. Both species are endemic to Brazil and known only from a single locality. The systematic position of both species with regard to the sections and subsections of Phyllanthus is also discussed.

O gênero Senna Mill. (Leguminosae, Caesalpinioideae, Cassieae) no Parque Estadual da Serra Dourada, GO, Brasil

A taxonomic study of the genus Senna in Parque Estadual da Serra Dourada, Goias State, is presented as a part of the Project Diversity of Leguminosae of the Cerrado s.l. from Central Brazil. Ten taxa were recognized: Senna alata, S. corifolia var. caesia, S. georgica, S. multijuga subsp. multijuga, S. obtusifolia, S. occidentalis, S. pendula var. glabrata, S. pilifera, S. rugosa, and S. silvestris subsp. bifaria. Descriptions, identification key, illustrations, geographical distribution, and taxonomic comments of the taxa are provided.

Levantamento das espécies de Amasonia (Lamiaceae) para o Brasil

This paper, a survey of Amasonia L.f. from Brazil, was based on field observations and study of herbarium specimens, photographs of the types, besides bibliographic documentation. Amasonia is a neotropical genus, distributed in South America and Antilles. Eight species are recognized here in the genus (A. angustifolia, A. arborea, A. calycina, A. campestris, A. hirta, A. lasiocaulos, A. obovata and A. spruceana) distributed mainly in the Amazon and central-western country. A key to identify the species, illustrations and flowering and fructification periods are provided.

Stylosanthes (Leguminosae-Papilionoideae-Dalbergiae) no estado de São Paulo, Brasil

Stylosanthes Sw. comprises 48 species with a pantropical distribution. The genus is a member of the informal Pterocarpus - Dalbergioid clade. This work presents a taxonomic study of the genus Stylosanthes for Sao Paulo state, through analysis of specialized literature and material from national herbaria. Nine species were recognized: S. acuminata M.B. Ferreira & Sousa Costa, S. bracteata Vogel, S. capitata Vogel, S. humilis Kunth, S. gracilis Kunth, S. grandiflora M.B. Ferreira & Sousa Costa, S guianensis (Aubl.) Sw., S. scabra Vogel and S. viscosa Sw., differing mainly in habit, inflorescence form, number of articles per loment, aspect of the rostrum in the loments and seed aspect. Descriptions, illustrations, comments on affinities between species based on morphology, geographic distribution and a key for the recognition of the taxa are provided.

Two new species of Lonchocarpus (Leguminosae, Papilionoideae, Millettieae) from Brazil

SummaryTwo new species of Lonchocarpus from Brazil, assigned to sect. Laxiflori Benth., are described and illustrated and their affinities, geographical distribution and conservation status are discussed. Lonchocarpus laticiferus from arboreal caatinga vegetation of Bahia State, and deciduous forest of Minas Gerais State is related to L. montanus A. M. G. Azevedo ex M. J. Silva & A. M. G. Azevedo. Lonchocarpus graciliflorus, known only from the rain forest of Paraná, is morphologically similar to L. longiunguiculatus M. J. Silva & A. M. G. Azevedo.ResumoDuas novas espécies de Lonchocarpus do Brasil, pertencentes à seção Laxiflori Benth., são descritas e ilustradas e tem suas afinidades, distribuições geográficas, além de seus status de conservação, discutidos. Lonchocarpus laticiferus occure na caatinga arbórea do estado da Bahia e nas florestas estacionais deciduais de Minas Gerais, o qual assemelha-se morfologicamente a L. montanus A. M. G. Azevedo ex M. J. Silva & A. M. G. Azevedo. Lonchocarpus graciliflorus, conhecida apenas das florestas ombrófilas do Paraná, que é semelhante morfologicamente a L. longiunguiculatus M. J. Silva & A. M. G. Azevedo.