Revisiting Glaziou and the botany of the second Cruls Mission: three new species and 23 accepted species of Myrcia (Myrtaceae) collected from Goiás, Brazil and a detailed description of his “Goyaz” itinerary.

Glaziou was one of the most prominent plant collectors in the history of Brazilian botany. His field expeditions during the second Cruls Mission (1894–1895) in the area now recognized as Goiás and Distrito Federal led him to collect 26 of the 32 species of Myrcia he was to name in his botanical career. Glaziou´s itinerary in the second Cruls Mission was reconstructed and mapped, showing he spent 40% of his collecting days in the present Distrito Federal and 60% in Goiás. His List of Species is now considered a suppressed work by the International Code of Nomenclature for the Algae, Fungi and Plants because he did not fulfill the criteria for formal species description. After examining over 300 specimens in Brazilian and European herbaria, we concluded that 23 of his names are synonyms of older, currently accepted names. The remaining three names are new species and are here formally described. This work underlines the importance of revisiting historical collections following recent changes in Myrcia taxonomy, to improve the understanding of species diversity in ecologically heterogeneous areas in large, morphologically complex genera such as Myrcia

Three new species of Myrcia sect. Myrcia (Myrtaceae) from South America.

Three new species of Myrcia are described, illustrated and discussed. Myrcia rionegrensis from the Brazilian Amazon is related to M. clusiifolia from which it differs in having leaves with acute apex and ribbed fruits (vs. rounded apex and smooth fruits in M. clusiifolia); Myrcia microcalyx is similar to Myrcia scytophylla but differs in having pubescent staminal ring and ellipsoid fruits (vs. glabrous staminal ring and globose fruits in M. scytophylla) and Myrcia peruviana is related to M. riverae, but differs in having smaller leaves and flower buds and ellipsoid fruits (vs. globose in M. riverae)

Brazilian Flora 2020: Leveraging the power of a collaborative scientific network

International audienceThe 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