First report of naturalization of Houttuynia cordata Thunb. 1783 (Piperales: Saururaceae) in South America

A relatively large and established population of Houttuynia cordata from Itatiaia National Park in Brazil represents the first record of naturalized Saururaceae in South America. Although the species is potentially invasive, unknown mechanisms have prevented its spread to other localities between 1940, when it was recorded in cultivation in Brazil, and the present. The nearest known naturalized population is situated 5,600 km away, in Costa Rica, Central America.Conselho Nacional de Pesquisa/[]/CNPq/BrasilCoordenação de Aperfeiçoamento de Pessoal de Nível Superior/[]/CAPES/BrasilUCR::Vicerrectoría de Docencia::Ciencias Básicas::Facultad de Ciencias::Escuela de Biologí

Flora das cangas da Serra dos Carajás, Pará, Brasil: Gentianaceae

Resumo Este trabalho apresenta um estudo taxonômico das Gentianaceae das cangas da Serra dos Carajás. Foram encontradas sete espécies pertencentes a cinco gêneros: Chelonanthus viridiflorus, Chelonanthus purpurascens, Coutoubea ramosa, Curtia tenuifolia, Schultesia benthamiana, Voyria tenella, inclusive uma nova espécie aqui descrita, Voyria alvesiana E.F.Guim., T.S.Mendes & N.G.Silva sp. nov

Flora do Rio de Janeiro: Lentibulariaceae

This study focuses on the Lentibulariaceae found in the state of Rio de Janeiro. It is based on a morphological analysis of herbaria collections, as well as on a review of the relevant literature and on collections in the field. A total of two genera and 20 species were recorded for the state. An identification key, descriptions, illustrations, flowering and fruiting data, habitat and species distribution are also provided

Flora do Rio de Janeiro: Lentibulariaceae

Resumo O presente estudo tem como objetivo contribuir para o conhecimento das espécies de Lentibulariaceae ocorrentes no estado do Rio de Janeiro. O trabalho tem por base a análise morfológica de materiais depositados em herbários e coletas de campo, além da compilação de dados de literatura. Foram registrados dois gêneros e 20 espécies. Chave para identificação, descrições, ilustrações, dados sobre floração e frutificação, hábitat, fenologia e distribuição geográfica das espécies são apresentados

Selecting the best candidates for resurrecting extinct-in-the-wild plants from herbaria

: Resurrecting extinct species is a fascinating and challenging idea for scientists and the general public. Whereas some theoretical progress has been made for animals, the resurrection of extinct plants (de-extinction sensu lato) is a relatively recently discussed topic. In this context, the term 'de-extinction' is used sensu lato to refer to the resurrection of 'extinct in the wild' species from seeds or tissues preserved in herbaria, as we acknowledge the current impossibility of knowing a priori whether a herbarium seed is alive and can germinate. In plants, this could be achieved by germinating or in vitro tissue-culturing old diaspores such as seeds or spores available in herbarium specimens. This paper reports the first list of plant de-extinction candidates based on the actual availability of seeds in herbarium specimens of globally extinct plants. We reviewed globally extinct seed plants using online resources and additional literature on national red lists, resulting in a list of 361 extinct taxa. We then proposed a method of prioritizing candidates for seed-plant de-extinction from diaspores found in herbarium specimens and complemented this with a phylogenetic approach to identify species that may maximize evolutionarily distinct features. Finally, combining data on seed storage behaviour and longevity, as well as specimen age in the novel 'best de-extinction candidate' score (DEXSCO), we identified 556 herbarium specimens belonging to 161 extinct species with available seeds. We expect that this list of de-extinction candidates and the novel approach to rank them will boost research efforts towards the first-ever plant de-extinction