RESUMO (Microlicia D. Don (Microlicieae, Melastomataceae) no Parque Nacional da Chapada dos Veadeiros, Estado de Goiás, Brasil). Microlicia D. Don compreende 170 espécies, 150 das quais presentes no Brasil, sendo 149 delas endêmicas. O conhecimento taxonômico desse gênero na região Centro-Oeste do país é precário. É apresentado o tratamento taxonômico de Microlicia no Parque Nacional da Chapada dos Veadeiros, Goiás, Brasil, o qual resultou de 24 coletas mensais com duração de três a cinco dias durante o período de 2014 a 2016. Foram registradas 18 espécies, sendo quatro estabelecidas durante os estudos desse grupo de pesquisa e já publicadas (M. chrysoglandulosa R. Romero, Versiane, Fontelas & D.O. Diniz-Neres, M. veadeirana D.O. Diniz-Neres & M. J. Silva, M. latifolia D.O. Diniz & M.J. Silva e M. stenodonoides D.O. Diniz-Neres & M.J. Silva), uma nova ocorrência para Goiás (M. scoparia DC.), duas espécies (M. crebropunctata Pilg. e M. melanostagma Pilg.) são consideradas raras, e as demais comuns aos Estados de Goiás e Minas Gerais. São apresentadas chave de identificação, descrições com comentários sobre distribuição, épocas de floração e frutificação, comparações morfológicas, ilustrações para os táxons, bem como fotografias para a maioria deles. A partir deste estudo o gênero passa de 19 para 24 espécies no Estado de Goiás.
We describe here two new species of Tibouchina from the Brazilian Cerrado. Tibouchina falcifolia is endemic to the state of Goiás and it can be readily recognized by the lanceolate to linear, conduplicate, pendulous leaves, and very conspicuous hypanthium scales. It is morphologically related to Tibouchina aegopogon var. angustifolia, especially by the narrow leaves, but differs by the older branches decorticant (vs. older branches non-decorticating), slightly discolorous leaves (vs. strongly discolorous leaves), with the adaxial surface covered by trichomes (vs. covered by scales). Tibouchina longisquamata is a species endemic to the state of Tocantins and it can be readily recognized by the oval, flat, patent leaves and hypanthium with long scales. It shares with Tibouchina llanorum the oval, slightly discolorous leaves, with a conspicuous petiole, and hypanthium covered with long scales. Tibouchina longisquamata differs from T. llanorum by its subcylindrical branches (vs. 4-6 angulose) and leaves with the adaxial surface covered by trichomes (vs. covered by scales). According to our assessments, based on IUCN criteria, T. falcifolia must be considered as endangered (EN) because its occurrence is restricted, and its populations are small; T. longisquamata is indicated in Deficient Data (DD), with only two known collections. We present here complete descriptions of the new species, taxonomic comments, illustrations made from dehydrated material, photos of live specimens (for T. falcifolia), plates with microscopic details, a distribution map, and an updated list of species of the genus in the Brazilian Cerrado, with its occurrences by state.
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