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| Ouratea | |
|---|---|
| Name | Ouratea |
| Regnum | Plantae |
| Unranked divisio | Angiosperms |
| Unranked classis | Eudicots |
| Unranked ordo | Rosids |
| Ordo | Malpighiales |
| Familia | Ochnaceae |
| Genus | Ouratea |
Ouratea is a genus of flowering plants in the family Ochnaceae noted for its leathery leaves and yellow to orange flowers. Native primarily to tropical and subtropical regions of the Americas and Africa, the genus has been the subject of taxonomic revision and floristic study by botanists associated with institutions such as the Royal Botanic Gardens, Kew and the Missouri Botanical Garden. Researchers using herbarium collections from the Royal Botanic Garden Edinburgh, the Field Museum and the Muséum national d'Histoire naturelle have revised species concepts and distribution data.
The genus was described in the 19th century, with nomenclatural treatments appearing in floras such as the Flora Neotropica monographs and regional checklists by authors linked to the Smithsonian Institution and the New York Botanical Garden. Taxonomic placement within Ochnaceae has been evaluated using morphological characters and molecular phylogenetics involving laboratories at the Royal Botanic Gardens, Kew, the Max Planck Society-affiliated groups, and university departments including Harvard University and the University of São Paulo. Synonymy and circumscription have been debated in works published in journals like Taxon, American Journal of Botany, and Systematic Botany. Type specimens reside in herbaria such as Kew Herbarium (K), BM (Natural History Museum, London), and NY (New York Botanical Garden).
Plants in this genus are typically shrubs or small trees with characteristics documented in floristic treatments from the Amazonas collections and field guides produced by the Missouri Botanical Garden. Leaves are alternate and coriaceous, described in morphological keys used by staff at the Royal Botanic Garden Edinburgh and contributors to the Flora of Brazil. Flowers often have conspicuous stamens and anthers, characters discussed in comparative studies published in Annals of Botany and referenced by taxa studied at the Smithsonian Tropical Research Institute. Fruit morphology and seed anatomy have been illustrated in publications by researchers affiliated with the University of Oxford and the Universidade Federal do Rio de Janeiro.
Species occur across Central America, South America, and parts of Africa, with records from countries including Brazil, Colombia, Ecuador, Peru, Venezuela, Guyana, Suriname, French Guiana, Bolivia, Panama, Costa Rica, Nicaragua, Honduras, Guatemala, Belize, Mexico, Cameroon, Gabon, and Angola. Distributional data has been incorporated into databases maintained by the Global Biodiversity Information Facility and the International Union for Conservation of Nature. Habitats range from lowland Amazonian rainforest sites surveyed by teams from the Instituto Nacional de Pesquisas da Amazônia to montane cloud forests documented in inventories by the Conservation International and the World Wildlife Fund.
Flowering and fruiting phenologies have been recorded in long-term plots managed by the Tropical Ecology Assessment and Monitoring network and by field studies conducted by researchers at the Smithsonian Tropical Research Institute and the Instituto de Investigaciones de la Amazonia Peruana. Pollination biology has been inferred from observations involving insects common in Neotropical ecosystems, with pollinator assemblages overlapping with those studied in work by entomologists at the Natural History Museum, London and the Royal Society. Seed dispersal mechanisms involve frugivorous birds and mammals documented in ecological studies by the Xerces Society and the Wildlife Conservation Society, with germination experiments referenced in horticultural bulletins from the Kew Gardens outreach.
The genus comprises numerous species recognized in regional floras such as the Flora Neotropica series and national checklists prepared by the Instituto de Botánica Darwinion and the Brazilian Flora 2020 project. Notable taxa have been described by taxonomists publishing in outlets like Brittonia and Curtis's Botanical Magazine, with type descriptions lodged in herbaria including P (Herbarium Berolinense), F (Field Museum), and US (United States National Herbarium). Revisionary work cited in journals like Kew Bulletin and Phytotaxa has clarified species limits and identified cryptic taxa that warrant conservation attention.
Ethnobotanical uses have been recorded in surveys conducted by researchers associated with the Instituto Nacional de Pesquisas da Amazônia and anthropologists working in collaboration with the Pan American Health Organization. Traditional medicinal applications appear in compendia compiled by collaborators from the World Health Organization and regional universities such as the Universidade Federal do Pará. Local names and uses feature in databases curated by the Royal Botanic Gardens, Kew and in ethnobotanical monographs published by the Smithsonian Institution.
Conservation status assessments for species have been undertaken following criteria established by the International Union for Conservation of Nature and published as part of regional red lists prepared by national agencies including the Brazilian Institute of Environment and Renewable Natural Resources and the Ministry of Environment (Peru). Threats mirror those documented for Neotropical and Afrotropical flora in reports by Conservation International, World Wildlife Fund, and the Intergovernmental Science-Policy Platform on Biodiversity and Ecosystem Services, including habitat loss from activities monitored by the United Nations Environment Programme and land-use change studies by the Food and Agriculture Organization of the United Nations.
Category:Ochnaceae