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The shortage of reliable primary taxonomic data limits the description of biological taxa and the understanding of biodiversity patterns and processes, complicating biogeographical, ecological, and evolutionary studies. This deficit creates a significant taxonomic impediment to biodiversity research and conservation planning. The taxonomic impediment and the biodiversity crisis are widely recognized, highlighting the urgent need for reliable taxonomic data. Over the past decade, numerous countries worldwide have devoted considerable effort to Target 1 of the Global Strategy for Plant Conservation (GSPC), which called for the preparation of a working list of all known plant species by 2010 and an online world Flora by 2020. Brazil is a megadiverse country, home to more of the world's known plant species than any other country. Despite that, Flora Brasiliensis, concluded in 1906, was the last comprehensive treatment of the Brazilian flora. The lack of accurate estimates of the number of species of algae, fungi, and plants occurring in Brazil contributes to the prevailing taxonomic impediment and delays progress towards the GSPC targets. Over the past 12 years, a legion of taxonomists motivated to meet Target 1 of the GSPC, worked together to gather and integrate knowledge on the algal, plant, and fungal diversity of Brazil. Overall, a team of about 980 taxonomists joined efforts in a highly collaborative project that used cybertaxonomy to prepare an updated Flora of Brazil, showing the power of scientific collaboration to reach ambitious goals. This paper presents an overview of the Brazilian Flora 2020 and provides taxonomic and spatial updates on the algae, fungi, and plants found in one of the world's most biodiverse countries. We further identify collection gaps and summarize future goals that extend beyond 2020. Our results show that Brazil is home to 46,975 native species of algae, fungi, and plants, of which 19,669 are endemic to the country. The data compiled to date suggests that the Atlantic Rainforest might be the most diverse Brazilian domain for all plant groups except gymnosperms, which are most diverse in the Amazon. However, scientific knowledge of Brazilian diversity is still unequally distributed, with the Atlantic Rainforest and the Cerrado being the most intensively sampled and studied biomes in the country. In times of “scientific reductionism”, with botanical and mycological sciences suffering pervasive depreciation in recent decades, the first online Flora of Brazil 2020 significantly enhanced the quality and quantity of taxonomic data available for algae, fungi, and plants from Brazil. This project also made all the information freely available online, providing a firm foundation for future research and for the management, conservation, and sustainable use of the Brazilian funga and flora.

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RESUMO.A arborização de um município deve ser planejada e baseada em critérios técnicos que permitam que a implantação das espécies seja realizada dentro das características ambientais locais. Em Foz do Iguaçu -PR, a ausência de um plano municipal de arborização urbana acarreta em algumas situações conflitantes como a presença de espécies exóticas e não recomendadas para arborização urbana nas vias municipais. O presente trabalho objetivou inventariar a arborização em trecho da região central da Avenida Juscelino Kubitscheck. A pesquisa foi realizada por meio do método Inventario Florestal 100%, caracterizado por abranger todos os indivíduos arbóreos presentes no local da pesquisa. Foram encontrados 114 indivíduos arbóreos de cinco espécies, sendo elas: Ipê amarelo (Tabebuia alba), Sibipiruna (Caesalpinia pluviosa), Alfeneiro (Ligustrum vulgare) e Oiti (Licania tomentosa), pertencentes a quatro famílias (Fabaceae, Bignoniaceae, Oleaceae e Chrysobalanaceae) e cinco gêneros distintos (Tipuana, Tabeluia, Caesalpinia, Ligustrum e Licania). A espécie Tipuana tipu foi a que apresentou maior ocorrência, com 92 indivíduos. A espécie Oiti (Licania tomentosa) apresentou apenas 1 indivíduo. Observou-se que 60% das espécies encontradas são nativas e 40% são exóticas. É possível considerar que há inúmeros equívocos com relação à população arbórea presente no local, evidenciando que o plantio das espécies foi realizado de modo aleatório e sem critérios técnicos. Deste modo, evidencia-se necessidade de manejo e planejamento para que as futuras espécies implantadas sejam as adequadas para o local.

The aim of this study was to evaluate the effect of the weed competition with different spacings in the culture of flaxseed (Linum usitatissimum L.). The experiment was conducted at the Campus of Unioeste-Cascavel, Paraná State, using the split-plot design in which the plots consisted of presence and absence of weeds and subplots consisted of row spacings (0.15, 0.30, and 0.45 m) with six replications. Plant height, number of capsules, stems and seeds per plant and yield (kg.ha-1) were determined. The increase of spacings between rows and the coexistence with the weed community were detrimental to production components of flaxseed.