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      Flora das cangas da Serra dos Carajás, Pará, Brasil: Nyctaginaceae Translated title: Flora of the cangas of the Serra dos Carajás, Pará, Brazil: Nyctaginaceae

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          Abstract

          Resumo Este estudo engloba as espécies de Nyctaginaceae registradas para a Serra dos Carajás, no estado do Pará, trazendo descrições detalhadas, ilustrações e comentários morfológicos das espécies na área. Foram registradas as seguintes espécies: Neea macrophylla e N. oppositifolia com distribuição amazônica e periamazônica, Guapira venosa e Neea floribunda com distribuição disjunta nos biomas Amazônia e Mata Atlântica.

          Translated abstract

          Abstract This study includes the species of Nyctaginaceae recorded for the cangas of the Serra dos Carajás, Pará State, and provides detailed descriptions, illustrations, and morphological comments of the species in the study area. Four species were recorded: Neea macrophylla and N. oppositifolia occurring in amazonic and periamazonic areas, Guapira venosa and Neea floribunda, with a disjunct distribution between Amazonian Rainforest and Atlantic Forest biomes.

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          Molecular phylogeny of Nyctaginaceae: taxonomy, biogeography, and characters associated with a radiation of xerophytic genera in North America.

          The four o'clock family (Nyctaginaceae) has a number of genera with unusual morphological and ecological characters, several of which appear to have a "tendency" to evolve repeatedly in Nyctaginaceae. Despite this, the Nyctaginaceae have attracted little attention from botanists. To produce a phylogeny for the Nyctaginaceae, we sampled 51 species representing 25 genera (of 28-31) for three chloroplast loci (ndhF, rps16, rpl16, and nrITS) and included all genera from North America. Parsimony, likelihood, and Bayesian methods were used to reconstruct the phylogeny for the family. The family is neotropical in origin. A radiation of woody taxa unites Pisonia and Pisoniella with the difficult tropical genera Neea and Guapira, which also form a clade, though neither appears to be monophyletic. This group is sister to a clade containing Bougainvillea, Belemia, and Phaeoptilum. A dramatic radiation of genera occurred in the deserts of North America. The tribe Nyctagineae and its subtribes are paraphyletic, due to over-reliance on a few homoplasious characters, i.e., pollen morphology and involucre presence. Two notable characters associated with the desert radiation are cleistogamy and edaphic endemism on gypsum soils. We discuss evolutionary trends in these traits in light of available data about self-incompatibility and gypsum tolerance in Nyctaginaceae.
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            A new tribal classification of Nyctaginaceae

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              The families and genera of flowering plants

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                Author and article information

                Contributors
                Role: ND
                Role: ND
                Journal
                rod
                Rodriguésia
                Rodriguésia
                Instituto de Pesquisas Jardim Botânico do Rio de Janeiro (Rio de Janeiro, RJ, Brazil )
                0370-6583
                2175-7860
                2017
                : 68
                : 3spe
                : 1045-1051
                Affiliations
                [1] Belém PA orgnameInstituto Tecnológico Vale Brazil
                Article
                S2175-78602017000501045
                10.1590/2175-7860201768339
                9209d727-b133-41cb-bc5f-b612d6df3aa6

                This work is licensed under a Creative Commons Attribution 4.0 International License.

                History
                : 02 April 2017
                : 05 July 2017
                Page count
                Figures: 0, Tables: 0, Equations: 0, References: 6, Pages: 7
                Product

                SciELO Brazil


                Floresta Nacional Carajás,flora,taxonomia,Amazonia,Carajás National Forest,taxonomy,Amazônia

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