Sparganium emersum
Rehmann · speciesAt a glance
Sources12 archives
Databases and archives Sparganium emersum's data was compiled from.
WikipediaWikimedia Foundation11 languages↗
BioWikiNetmultilingual Wikipediamultilingual↗
GBIFGlobal Biodiversity Information Facility95 204 records↗
ENAEuropean Nucleotide Archive · EMBL-EBI28 eDNA detections↗
BOLD SystemsCentre for Biodiversity Genomics48 specimens↗
NCBIUS National Library of Medicinesequences↗
GRIN TaxonomyUSDA-ARSdistribution & uses↗
Open Tree of LifeOpenTreephylogeny backbone↗
CCDBChromosome Counts DB · Tel Aviv U.genome & karyotype↗
GoaTGenomes on a Tree · Sangergenome & karyotype↗
PloiDBPloidy Databasegenome & karyotype
WikidataWikimedia Foundationstructured facts↗Every layer below draws on the sources above — open one to explore it, or use ← → to move between tabs.
Sparganium emersum is a species of flowering plant in the cat-tail family known by the common names European bur-reed and unbranched bur-reed. It has a circumboreal distribution, occurring throughout the northern latitudes of Eurasia and North America. It is an aquatic plant, growing in shallow water bodies such as ponds and streams. It can become abundant at times. It is a perennial herb producing a floating stem up to 2 meters long. The leaves may be limp and floating or stiff and erect, emerging above the water surface. The leaves are flat and straplike, sometimes with a triangular, keeled base that can help distinguish it from the similar Sparganium angustifolium. It is monoecious, individual plants bearing both male and female inflorescences. These are spherical, the male inflorescence a ball of stamens and the female inflorescence a ball of developing fruits growing beneath the male spheres.
No narrative description available for this taxon yet.
Size & morphology15
Life cycle & reproduction14
Diet & foraging2
Habitat & environment9
Physiology & chemistry6
Other traits1
A DNA barcode is a short, standardised stretch of genes that works like a fingerprint — enough to tell one species from another. Below is the molecular trace Sparganium emersum has left across the world's sequence archives.
At a glance
★ the standard DNA barcode for this group — the short region actually read to tell this species apart. The rest are extra genes sequenced along the way.
The complete instruction manual Sparganium emersum carries — its genome. We read it from three angles — how big it is, how the DNA is packed into chromosomes, and how completely it has been sequenced — and explain how to read each value as you go.
Genome sizehow big the whole instruction manual is
Measured in base pairs (bp) — the individual letters of DNA (human ≈ 3.2 Gb, a bacterium a few million). The chart places this genome on a logarithmic scale — each step to the right is ten times bigger — among reference organisms. Across species a bigger genome loosely tracks with larger cells, slower growth and lower-energy lifestyles (powered flight favours small genomes) — yet it does not imply more genes or a more advanced organism (the long-standing C-value paradox).
Chromosomes & ploidyhow the DNA is packaged
2n is the full chromosome count in a normal body cell; n is a gamete (egg or sperm), which carries half. Ploidy is how many complete chromosome sets each cell holds — 2× (diploid) is typical for animals, while higher levels (polyploidy) are common in plants. Click any value below to see the underlying records and sources.
2n 3020×GoaT · DTOL Flowering Plants Estimates Kew · CCDB · slov-fl · CCDB · nw-europe-fl +8
diploid inferred1×PloiDB · genus-scale
Sequencing statusassembly quality — how far to trust these numbers
Assembly level tells you how finished the sequence is — from fragmented contigs, through scaffolds, up to a full chromosome-level assembly. BUSCO % estimates completeness: the share of genes expected to be present that were actually found. These describe the data quality, not the organism.
How far back this lineage goes — and how we know. Everything here is measured in Ma, short for “mega-annum”: millions of years ago. The chart reads left to right like a calendar of the Earth, from the deep past on the left to today at the right edgetop to bottom like a core drilled through the Earth, from the deep past at the top down to today at the bottom.
At a glance
When this lineage existed
How to read this: the coloured strip along the bottomdown the left is the geological calendar — the standard epochs (Pliocene, Pleistocene…) every museum uses, shown so you can see which chapter of Earth's history this lineage lived in. This lineage is a young one, so the strip is zoomed in to epochs — the finer subdivisions inside a period. The orange marker is the DNA clock: DNA accumulates mutations at a roughly steady rate, so comparing this species' DNA with its relatives estimates when the lineage split off — independently of any fossil.
Record type95 204 records
Origin
Range
Wildobservation + sensor
Human sightings and records, or camera-trap / sensor detections — someone (or a device) saw or captured the species in the wild.
Museum / Voucheredphysical evidence
Backed by a physical specimen — a herbarium sheet, sample or voucher held in a collection. “Vouchered” means supported by material evidence, not just an observation.
Cultivated / Captivenot free-living
A living individual in a botanical garden, zoo or nursery — cultivated or kept, not free-living.
Wildobservation + sensor
Human sightings and records, or camera-trap / sensor detections — someone (or a device) saw or captured the species in the wild.
Holding institutions115 of 229 geolocated
Institutions and collections holding physical, vouchered specimens of this species — click a row to fly to it on the map.
| Institution | Specimens |
|---|---|
| Helsinki, FI | 1 309 |
| Uniwersytet Wrocławskilocation not on record | 600 |
| LDlocation not on record | 530 |
| Moscow State Universitylocation not on record | 431 |
| Oulu, FI | 340 |
| Olocation not on record | 300 |
| Tartu, EE | 231 |
| St. Paul, US | 202 |
| SLU Artdatabankenlocation not on record | 176 |
| Madison, US | 167 |
| Chongqing Museumlocation not on record | 148 |
| Université Lavallocation not on record | 133 |
| MeiseBGlocation not on record | 123 |
| Irkutsk State Universitylocation not on record | 121 |
| Oskarshamn, SE | 118 |
| Turku, FI | 118 |
| University of New Hampshirelocation not on record | 111 |
| Institute of the biological problems of the North FEB RASlocation not on record | 105 |
| Ann Arbor, US | 96 |
| BFLlocation not on record | 95 |
| Trondheim, NO | 86 |
| Chicago, US | 86 |
| Corvallis, US | 84 |
| Jyväskylä, FI | 83 |
| Green Bay, US | 80 |
| Montréal, CA | 74 |
| GBS RAN - Glavny Botanichesky Sad Rossijskoj Akademii Nauklocation not on record | 66 |
| WTUlocation not on record | 59 |
| BRNUlocation not on record | 53 |
| Görlitz, DE | 49 |
| Québec, CA | 46 |
| DBF-NHMDlocation not on record | 46 |
| TROMlocation not on record | 45 |
| Kuopio, FI | 45 |
| Victoria, CA | 43 |
| University of Alberta Museumslocation not on record | 42 |
| Bronx, US | 41 |
| Bloomington, US | 39 |
| Saint John, CA | 39 |
| Bern, CH | 38 |
| Salzburg, AT | 38 |
| Tallinn, EE | 37 |
| Bergen, NO | 36 |
| Moscow, US | 35 |
| Philadelphia, US | 32 |
| KMNlocation not on record | 32 |
| Toronto, CA | 31 |
| Vancouver, CA | 30 |
| Zürich, CH | 30 |
| Museo civico La Terra e l'Uomo di Crocetta del Montellolocation not on record | 28 |
| Dresden, DE | 27 |
| DOI/NPS, Little Rock Central High School National Historic Sitelocation not on record | 25 |
| Provincia di Livornolocation not on record | 25 |
| McWane Science Centerlocation not on record | 25 |
| Pullman, US | 24 |
| BIO-UNIPIlocation not on record | 23 |
| South Kensington, GB | 21 |
| Museum Ludovicae Ulricae, Zoology Institute of the University of Uppsalalocation not on record | 19 |
| Denver, US | 18 |
| DOI/NPS, Colonial National Historical Parklocation not on record | 18 |
| Metsähallituslocation not on record | 17 |
| Lincoln, US | 17 |
| ASUlocation not on record | 16 |
| Caldwell, US | 14 |
| Provo, US | 13 |
| DULlocation not on record | 13 |
| Wlocation not on record | 13 |
| Zürich, CH | 13 |
| Institute of Applied Ecology, Academia Sinicalocation not on record | 13 |
| TUR-Alocation not on record | 13 |
| Logan, US | 12 |
| Porrentruy, CH | 12 |
| Porvoo, FI | 12 |
| Chadron, US | 12 |
| Arcata, US | 12 |
| Montréal, CA | 11 |
| Boise, US | 11 |
| Bozeman, US | 11 |
| Mlocation not on record | 11 |
| IWEP FEB RASlocation not on record | 10 |
| MAlocation not on record | 10 |
| Musee des Dinosaures d'Esperaza (Aude)location not on record | 10 |
| Uniwersytet Warszawskilocation not on record | 10 |
| Ernst-Moritz-Arndt-Universitat Greifswaldlocation not on record | 10 |
| Natural History Museum Rotterdamlocation not on record | 10 |
| Berlin, DE | 9 |
| GJOlocation not on record | 9 |
| Frankfurt am Main | 9 |
| CASlocation not on record | 8 |
| Flagstaff, US | 8 |
| Tula State Lev Tolstoy Pedagogical Universitylocation not on record | 8 |
| BSBIlocation not on record | 7 |
| NMBU:MINAlocation not on record | 7 |
| International Salmonella Centre (W.H.O.)location not on record | 7 |
| University of Wisconsinlocation not on record | 7 |
| Whitehorse, CA | 7 |
| Tula State Universitylocation not on record | 7 |
| Durham, US | 7 |
| Forssa, FI | 7 |
| Uppsala, SE | 6 |
| Phoenix, US | 6 |
| Tsukuba, JP | 6 |
| Rovaniemi, FI | 6 |
| Tilburg, NL | 6 |
| PRClocation not on record | 6 |
| Portland, US | 6 |
| LfUlocation not on record | 6 |
| Acadia Universitylocation not on record | 5 |
| CJBGlocation not on record | 5 |
| Tromso University Museumlocation not on record | 5 |
| DOI/NPS, Mount Rainier National Parklocation not on record | 5 |
| Davis, US | 5 |
| Kandalaksha State Nature Reservelocation not on record | 5 |
| Truckee, US | 5 |
| Brookings, US | 4 |
| Tacoma, US | 4 |
| Henderson, US | 4 |
| Museum of the Rockieslocation not on record | 4 |
| US | 4 |
| Albuquerque, US | 4 |
| Nijmegen, NL | 4 |
| Auckland, NZ | 4 |
| Whitewater, US | 4 |
| Maryland Department of Natural Resourceslocation not on record | 4 |
| Beijing, CN | 4 |
| Riverside, US | 3 |
| GMBAlocation not on record | 3 |
| Millersville, US | 3 |
| Conservatoire botanique national du Bassin parisienlocation not on record | 3 |
| Frauenfeld, CH | 3 |
| Dekalb, US | 3 |
| BDBClocation not on record | 3 |
| The State Museum-Preserve "The Kulikovo pole"location not on record | 3 |
| nbflocation not on record | 3 |
| Pocatello, US | 3 |
| San Jose State University, Museum of Birds and Mammalslocation not on record | 3 |
| Bourges, FR | 3 |
| Chicago, US | 3 |
| Staatliches Museum fuer Naturkunde Karlsruhe (State Museum of Natural History)location not on record | 3 |
| Research Collection of B. A. Bennettlocation not on record | 3 |
| National Museum Waleslocation not on record | 3 |
| Finnish Museum of Natural History, Botanical Museumlocation not on record | 3 |
| Angwin, US | 3 |
| John May Museum of Natural Historylocation not on record | 3 |
| Brussel, BE | 3 |
| Trois-Rivières, CA | 3 |
| Naturalis Biodiversity Centerlocation not on record | 3 |
| Fargo, US | 2 |
| Universidad del Pais Vasco (UPV/EHU)location not on record | 2 |
| Bureau of Land Management, Medford District Officelocation not on record | 2 |
| Podgorica, ME | 2 |
| Barcelona, ES | 2 |
| Entomological Society of Latvialocation not on record | 2 |
| Weber State Universitylocation not on record | 2 |
| H-AkrKGlocation not on record | 2 |
| FLADlocation not on record | 2 |
| Lubbock, US | 2 |
| USFS/BHSClocation not on record | 2 |
| ZRC-SAZUlocation not on record | 2 |
| Bothell, US | 2 |
| Philadelphia, US | 2 |
| Hokkaido University Museumlocation not on record | 2 |
| Minia, EG | 2 |
| Uniwersytet Śląski w Katowicachlocation not on record | 2 |
| VALElocation not on record | 2 |
| SZUlocation not on record | 2 |
| San Diego, US | 2 |
| Claremont, US | 2 |
| San Jose, US | 2 |
| Cheney, US | 2 |
| Fulda, DE | 2 |
| Adam Mickiewicz University in Poznańlocation not on record | 2 |
| Institut und Museum fuer Geologie und Palaeontologielocation not on record | 2 |
| Toyama, JP | 2 |
| The Tula Region State Institution of Culture "Tula Museum Association"location not on record | 2 |
| Bend, US | 2 |
| Xiamen, CN | 2 |
| Nishihara, JP | 2 |
| Lord Fairfax Community Collegelocation not on record | 2 |
| H-Hohlalocation not on record | 2 |
| State University of New York, College at Oneontalocation not on record | 1 |
| Boumlocation not on record | 1 |
| AUAlocation not on record | 1 |
| CJBNlocation not on record | 1 |
| Forest Survey and Design Institute, Forestry Administrative Bureau of Daxinganlinglocation not on record | 1 |
| Prioksko-Terrasnyi Biosphere Reservelocation not on record | 1 |
| Glarus, CH | 1 |
| University of Southern Mississippilocation not on record | 1 |
| Lanzhou, CN | 1 |
| IFR-DNFlocation not on record | 1 |
| Durango, US | 1 |
| Fribourg, CH | 1 |
| Sion, CH | 1 |
| Museo civico di Storia naturale Giacomo Doria di Genova | Giacomo Doria Natural History Museum in Genoalocation not on record | 1 |
| DOI/NPS, Greenbelt Parklocation not on record | 1 |
| Madrid, ES | 1 |
| UoB-IBlocation not on record | 1 |
| Orem, US | 1 |
| Bureau of Land Management, Caliente Field Officelocation not on record | 1 |
| Kew, GB | 1 |
| KNFYlocation not on record | 1 |
| San Luis Obispo, US | 1 |
| Severin-McDaniel Insect Collectionlocation not on record | 1 |
| PrivatHerblocation not on record | 1 |
| Fairfax, US | 1 |
| University of Guelph, OAC Herbariumlocation not on record | 1 |
| Centre for Biodiversity Genomicslocation not on record | 1 |
| McGill University, Herbariumlocation not on record | 1 |
| Anchorage, US | 1 |
| Muséum Henri Lecoqlocation not on record | 1 |
| Namur, BE | 1 |
| H-Diewaldlocation not on record | 1 |
| Royal Botanic Garden Edinburghlocation not on record | 1 |
| Herb. BBGlocation not on record | 1 |
| No collectionlocation not on record | 1 |
| Oswego, US | 1 |
| KNFHClocation not on record | 1 |
| University of Stellenboschlocation not on record | 1 |
| Uniwersytet Opolskilocation not on record | 1 |
| Ashland, US | 1 |
| Morgantown, US | 1 |
| Missoula, US | 1 |
| HJAEFlocation not on record | 1 |
| Tempe, US | 1 |
| Canadian Department of Agriculturelocation not on record | 1 |
| Stockholm, SE | 1 |
| Rocky Mountain Biological Laboratorylocation not on record | 1 |
| New Haven, US | 1 |
| Salamanca, ES | 1 |
Cultivated / Captivenot free-living
A living individual in a botanical garden, zoo or nursery — cultivated or kept, not free-living.
Where the DNA of Sparganium emersum was picked up in samples of water, soil or air — nobody saw the organism, only its DNA left behind. A trace is a clue that the species was near, not a confirmed sighting.
Signal
Where its DNA was found
How strong is each trace?
Modelled climatemodelled
How to read this: each dot is one detection of this species' DNA in an environmental sample. The confidence meter weighs how many independent studies and places back up the signal — one detection in one study is a hint; many across several studies is solid. Records dated before 2008 (when eDNA methods began) are treated as likely mislabeled and left off the map.