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| Echinopsis | |
|---|---|
| Name | Echinopsis |
| Family | Cactaceae |
| Order | Caryophyllales |
| Native range | South America |
Echinopsis is a genus of cacti notable for its bulbous stems and large, often nocturnal flowers. Originating from South America, it has been studied and cultivated widely, appearing in botanical gardens, private collections, and horticultural literature. The genus has intersected with many botanical institutions and explorers over time.
Echinopsis species are generally globose to short-cylindrical succulents with ribs, tubercles, or spines that vary among populations collected by explorers such as Alexander von Humboldt, Aimé Bonpland, Charles Darwin, Joseph Dalton Hooker, and contributors at institutions like the Royal Botanic Gardens, Kew and the Missouri Botanical Garden. Morphological descriptions appear in floras compiled by authors associated with the Royal Horticultural Society, the New York Botanical Garden, and the Smithsonian Institution. Floral characters—large, funnel-shaped or tubular blooms—have been documented in monographs and herbaria at the Natural History Museum, London and the Muséum National d'Histoire Naturelle, Paris. Field studies by researchers connected to the American Society of Plant Taxonomists, the Botanical Society of America, and universities including Harvard University, University of California, Berkeley, University of Oxford, and Universidad Nacional de Córdoba provide comparative data on stem anatomy, rib structure, and areole morphology. Descriptive work often references collectors and taxonomists associated with the Kew Bulletin, Annals of Botany, and the Journal of Systematic Palaeontology.
The taxonomy of Echinopsis has been debated by botanists and was revised in treatments by taxonomists working with institutions like the International Association for Plant Taxonomy, the International Plant Names Index, and the Germplasm Resources Information Network. Historical naming involved contributions from Karl Sigismund Kunth, Joseph zu Salm-Reifferscheidt-Dyck, Eduard Friedrich Poeppig, Curt Backeberg, and curators at the Field Museum of Natural History. Molecular phylogenetic analyses published in journals from the Royal Society and universities such as University of Vienna and University of Zürich prompted re-evaluation alongside earlier morphological frameworks advocated by authors in the Botanical Journal of the Linnean Society and the Journal of Plant Research. Nomenclatural decisions have been influenced by code rulings and committees associated with the International Botanical Congress and repositories like the Global Biodiversity Information Facility.
Echinopsis taxa are distributed across Argentina, Bolivia, Paraguay, Uruguay, and parts of Brazil and Peru, with records catalogued by national herbaria including the Herbario Nacional de Bolivia, the Museo de La Plata, and the Herbario de la Universidad Nacional de Salta. Habitats range from high-Andean puna near the Andes to lowland dry forests and scrublands surveyed by expeditions funded by organizations such as the Smithsonian Tropical Research Institute and national parks like Sierra de las Quijadas National Park and Iguazú National Park. Elevational gradients recorded in studies from the Organization of American States and environmental assessments by the World Wildlife Fund indicate adaptability to rocky slopes, sandy plains, and disturbed sites similar to those monitored by the United Nations Environment Programme.
Pollination ecology for Echinopsis involves nocturnal and diurnal visitors, with studies noting visits by hawk moths associated with literature from the Linnaean Society of London and bat pollinators recorded by researchers affiliated with the Bat Conservation International and the American Society of Mammalogists. Avian interactions, including those akin to nectar-feeding birds studied by contributors at the Cornell Lab of Ornithology and ecological surveys published in the Ecological Society of America outlets, have been documented. Seed dispersal and germination experiments have appeared in publications from the International Journal of Plant Sciences and the Society for Conservation Biology, while mutualistic and antagonistic relationships were addressed in comparative studies from the Royal Society Open Science and regional research centers like the Instituto de Biología Subtropical.
Echinopsis has a long history in horticulture with cultivars and hybrids propagated by nurseries connected to the Royal Horticultural Society, the American Horticultural Society, and specialist nurseries in Germany, the Netherlands, and the United States. Gardening manuals produced by authors linked to BBC Gardeners' World Magazine, the Chicago Botanic Garden, and the Royal Botanic Garden Edinburgh provide cultural recommendations. Uses include ornamental display in botanical institutions such as the United States Botanic Garden and landscape projects featured by the Royal Parks. Propagation and hybridization efforts have been disseminated through societies including the Cactus and Succulent Society of America and the International Organization for Succulent Plant Study.
Conservation status assessments for Echinopsis populations have been conducted by agencies like the International Union for Conservation of Nature, national ministries of environment in Argentina and Bolivia, and research programs at the World Conservation Monitoring Centre. Threats from habitat loss in regions monitored by the Food and Agriculture Organization, climate change impacts analyzed by the Intergovernmental Panel on Climate Change, and land-use change reports from the United Nations Development Programme have informed conservation planning. Ex situ conservation occurs in collections at the Royal Botanic Gardens, Kew, the Geneva Botanic Garden, and university seed banks affiliated with the Millennium Seed Bank Partnership.
Notable taxa and cultivated hybrids have been featured in monographs and horticultural records curated by the Royal Horticultural Society, the American Horticultural Society, and specialist journals such as the Cactus and Succulent Journal. Collections and exhibitions at the Chelsea Flower Show, the Eden Project, the Chicago Botanic Garden, and regional fairs in Córdoba and Mendoza have highlighted particular forms selected by breeders and institutions including the International Succulent Institute and private collections like those documented by the Huntington Library.
Category:Cactaceae Category:South American flora