A new species of dragon’s blood Croton (Euphorbiaceae) from Serra dos Órgãos (Rio de Janeiro, Brazil)
| Autor: | Ricarda Riina, Débora Medeiros, Sabrina Queiroz de Farias |
|---|---|
| Přispěvatelé: | Conselho Nacional de Desenvolvimento Científico e Tecnológico (Brasil) |
| Jazyk: | angličtina |
| Rok vydání: | 2019 |
| Předmět: |
Neotropics
Malpighiales Croton sect. Cyclostigma Plant Science Rainforest Stipule Atlantic Rain Forest Magnoliopsida taxonomy lcsh:Botany Plantae Ecology Evolution Behavior and Systematics Taxonomy Bract biology Cenozoic National park Euphorbiaceae Forestry biology.organism_classification Croton lcsh:QK1-989 Tracheophyta Geography Habitat Conservation status Taxonomy (biology) Americas Research Article |
| Zdroj: | PhytoKeys, Vol 126, Iss, Pp 13-24 (2019) Digital.CSIC. Repositorio Institucional del CSIC instname Digital.CSIC: Repositorio Institucional del CSIC Consejo Superior de Investigaciones Científicas (CSIC) PhytoKeys 126: 13-24 PhytoKeys |
| ISSN: | 1314-2011 1314-2003 |
| Popis: | Croton rizzinii Farias & Riina, sp. nov. is a new species from Serra dos órgãos National Park in the Atlantic Rain Forest domain (Rio de Janeiro state, Brazil). It is known from the municipalities of Guapimirim, Teresópolis and Petrópolis, where it grows in montane ombrophilous dense forest, between 500 and 1500 m elevation. This arborescent species belongs to Croton section Cyclostigma Griseb., a Neotropical lineage distributed in forest habitats from Mexico to northern Argentina. It is mainly characterised by its laciniate-glandular stipules, bracts with two inconspicuous glands (colleters) at the base and campanulate pistillate flowers with sepals covering the ovary. We describe and illustrate the new species, and compare it with close relatives occurring in the Atlantic Rain Forest. We also provide a distribution map, habitat information and suggestions for the assessment of its conservation status. This work is part of the Master’s dissertation of the first author, carried out under the Postgraduate Program in Biological Sciences (Botany) of the Universidade Federal do Rio de Janeiro (UFRJ), Museu Nacional, Rio de Janeiro, Brazil. The authors thank José Lúcio da Silva, staff member of the Botany Department (UFRJ) for fieldwork support. We also thank all herbarium curators and staff for allowing us to examine their collections; the Instituto Brasileiro do Meio Ambiente e Recursos Renováveis (IBAMA) and the Parque Nacional da Serra dos Órgãos (PARNASO), for issuing collecting permits; the Conselho Nacional de Desenvolvimento Científico e Tecnológico (CNPq) for funding (grant 831012/1999-4); and to the reviewers for their useful contributions |
| Databáze: | OpenAIRE |
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