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| Baccharis | |
|---|---|
| Name | Baccharis |
| Regnum | Plantae |
| Divisio | Tracheophyta |
| Classis | Magnoliopsida |
| Ordo | Asterales |
| Familia | Asteraceae |
| Genus | Baccharis |
Baccharis is a genus of flowering plants in the family Asteraceae, comprising shrubs and small trees widely distributed in the Americas; it appears in botanical literature, conservation assessments, and phytochemical studies across continental and island contexts. Prominent in floras and herbarium collections curated by institutions such as the Royal Botanic Gardens, Kew, the New York Botanical Garden, and the Smithsonian Institution, the genus features in taxonomic revisions, ecological surveys, and ethnobotanical reports. Researchers from universities including Harvard, Oxford, and Universidad de São Paulo have examined its systematics, biogeography, and interactions with pollinators, herbivores, and pathogens.
The genus belongs to the tribe Astereae within Asterales and was described in historical treatments alongside genera revised in works by Carl Linnaeus, Carl Friedrich Philipp von Martius, and later monographs from the United States Department of Agriculture and the Royal Botanic Gardens, Kew. Species delimitation has been debated in regional checklists produced by institutions such as the Missouri Botanical Garden, the New York Botanical Garden, and national herbaria in Argentina, Chile, and Brazil. Molecular phylogenies employing markers used in studies at University of California, Berkeley, Max Planck Institute for Evolutionary Anthropology, and Smithsonian Tropical Research Institute have reshaped generic boundaries and yielded revisions published in journals edited by Springer Nature, Elsevier, and the American Society of Plant Taxonomists. Type specimens and nomenclatural acts are indexed in databases curated by International Plant Names Index and the Global Biodiversity Information Facility.
Plants in this genus are generally characterized as dioecious shrubs or subshrubs with alternate leaves, capitula typical of Asteraceae and wind-dispersed achenes with pappus structures referenced in morphological keys used by botanists at Kew Gardens, Missouri Botanical Garden, and the Royal Botanic Garden Edinburgh. Floral morphology has been compared in treatments alongside genera studied at University of São Paulo, University of Chile, and National Autonomous University of Mexico, with descriptions appearing in floras such as those of Flora of North America and regional guides produced by the Smithsonian Institution. Vegetative and reproductive traits figure in identification manuals used by ecologists from University of California, Davis and conservationists at NatureServe and IUCN.
Members occur from Canada to Argentina and on islands such as the Galápagos Islands and Juan Fernández Islands, with significant species richness documented in biomes surveyed by researchers affiliated with CONICET, Instituto Nacional de Biodiversidad (INBio), and national parks like Yosemite National Park, Torres del Paine National Park, and Iguaçu National Park. Habitats include coastal scrub described in studies from California and Chile, montane zones in the Andes investigated by teams at Universidad Mayor de San Andrés, and cerrados and campos rupestres sampled by botanists linked to Embrapa and Universidade Federal de Minas Gerais. Distributional records are aggregated in occurrence datasets hosted by GBIF, integrated into regional red lists maintained by agencies in Peru, Colombia, and Mexico.
Ecological roles include early successional colonization noted in restoration projects coordinated with organizations such as The Nature Conservancy and Conservation International, and interactions with insect fauna documented in entomological surveys by researchers at Smithsonian Tropical Research Institute and Museum of Natural History, London. Pollination and floral ecology have been studied in comparison with systems investigated by teams at University of Oxford and University of Cambridge, while herbivory by Lepidoptera and Coleoptera is recorded in catalogs maintained by Natural History Museum, London and regional museums in Argentina and Chile. Pathogen and mycorrhizal associations are topics in plant pathology work from USDA Agricultural Research Service and mycology studies at Farlow Herbarium, and invasive behavior in nonnative regions has been addressed in management plans from Australian Department of Agriculture and New Zealand Department of Conservation.
Ethnobotanical uses appear in compendia compiled by scholars at Universidad Nacional Autónoma de México and University of São Paulo, with traditional medicinal applications recorded in surveys conducted by World Health Organization partners and NGOs such as CARE International in Latin America. Phytochemical investigations published in journals from Elsevier and Wiley examine flavonoids and terpenoids relevant to pharmacology groups at Johns Hopkins University and University of California, San Diego. Some species figure in agroforestry and restoration plantings promoted by Food and Agriculture Organization programs and regional extension services from Universidad de Buenos Aires and Universidade Federal do Rio de Janeiro.
Conservation status assessments feature in listings by IUCN and national red lists prepared by agencies in Chile, Argentina, and Brazil, with threats including habitat conversion documented in environmental impact studies commissioned by ministries such as Ministry of Environment (Brazil) and land-use analyses published by research centers at MIT and Universidad de los Andes (Colombia). Ex situ conservation involves seed banks and living collections held at institutions like Kew Gardens, the Royal Botanic Garden Edinburgh, and university herbaria at Harvard University and University of California, Berkeley. Restoration and invasive-species management practices are addressed in guidelines from The Nature Conservancy and regional conservation NGOs in the Caribbean, Pacific islands, and South America.