Vinicius Castro Souza

Laeliinae (Orchidaceae) do parque nacional do Caparaó, Estados do Espírito Santo e Minas Gerais, Brasil

This work aims to identify and characterize species of subtribe Laeliinae (Orchidaceae) occurring in the Parque Nacional do Caparao, between Minas Gerais and Espirito Santo States. The vegetation in the area comprises forests and campos de altitude, occurring at around 2,000 m, and the highest peak is the Pico da Bandeira, the highest point in the Southeastern region of Brazil with 2,890 m. Laeliinae is represented in that area by five genera and a total of nineteen species: Cattleya bicolor, C. cinnabarina, C. coccinea (subsp. coccinea and subsp. pygmaea), C. mantiqueirae, Encyclia bragancae, E. patens, Epidendrum armeniacum, E. caparaoense, E. chlorinum, E.xa0densiflorum, E.xa0filicaule, E. mantiqueiranum, E. pseudodifforme, E. saxatile, E. secundum, E. zappi, Loefgrenianthus blancheamesiae, Prosthechea punctifera and P. pygmaea. New combination is provide for Cattleya coccinea subsp. pygmaea.

Mimosa roseoalba (Leguminosae: Mimosoideae), a new species from Mato Grosso do Sul, Brazil

SummaryA new species of Mimosa L. sect. Calothamnos Barneby is described from the state of Mato Grosso do Sul, Brazil. M. roseoalba is characterised by its hirsutulose indumentum of plumose and penicillate trichomes, in having leaves with a single pair of pinnae, flowers in cylindrical spikes, the corolla tube covered by simple, retrorsely adpressed trichomes and the corolla lobe apices with longer plumose trichomes, and by white to pink coloured stamen filaments united basally for 0.5xa0mm.

Three new species of Octomeria (Orchidaceae: Pleurothallidinae) from northern South America

SummaryThree new species of Octomeria (Orchidaceae: Pleurothallidinae) from northern South America are proposed: O. platytylis from Bolivar State in Venezuelan montane forests, O. subcallosa from Ecuador and Suriname and O. tellina from La Paz State in Bolivian yungas forests. The species differ by a combination of vegetative and floral characters, among which are the shape of the leaves and, particularly the morphology of the lip.ResumoTrês novas espécies de Octomeria (Orchidaceae: Pleurothallidinae) do norte da América do Sul são propostas neste artigo: O. platytylis, do estado de Bolívar nas florestas montanas venezuelanas; O. subcallosa, das florestas do Equador e Suriname, e O. tellina da Bolívia, Estado de La Paz nas florestas denominadas yungas. As espécies diferem por uma combinação de caracteres vegetativos e florais, entre os quais destacam-se o formato das folhas e, especialmente, a morfologia do labelo.