Cirsium arvense
(L.) Scop. · speciesAt a glance
Sources15 archives
Databases and archives Cirsium arvense's data was compiled from.
WikipediaWikimedia Foundation14 languages↗
BioWikiNetmultilingual Wikipediamultilingual↗
GBIFGlobal Biodiversity Information Facility1 338 837 records↗
ENAEuropean Nucleotide Archive · EMBL-EBI160 eDNA detections↗
BOLD SystemsCentre for Biodiversity Genomics119 specimens↗
NCBIUS National Library of Medicinesequences↗
LOTUSNatural Products (Wikidata)compounds↗
NPASSNat. Product Activity & Species Sourcecompounds↗
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
Tree of SexTree of Sex Consortiumgenome & karyotype↗
GLoBIGlobal Biotic Interactionsbiotic interactions↗Every layer below draws on the sources above — open one to explore it, or use ← → to move between tabs.
Cirsium arvense is a perennial species of flowering plant in the family Asteraceae, native throughout Europe and western Asia, northern Africa and widely introduced elsewhere.Joint Nature Conservation Committee: Cirsium arvensehttp://www.efloras.org/florataxon.aspx?flora_id=2&taxon_id=200023656 Flora of China, 丝路蓟 si lu ji, Cirsium arvense (Linnaeus) Scopoli]Altervista Flora Italiana, Cardo dei campi comune, Acker-Kratzdistel, åkertistel, Cirsium arvense (L.) Scop. includes photos and distribution maps The standard English name in its native area is creeping thistle.Botanical Society of Britain and Ireland Database It is also commonly known as Canada thistle and field thistle.Flora of North America, Canada or creeping or field thistle, chardon du Canada ou des champs, cirse des champs, Cirsium arvense (Linnaeus) ScopoliNebraska Department of Agriculture Noxious Weed Program The plant is beneficial for pollinators that rely on nectar. It also was a top producer of nectar sugar in a 2016 study in Britain, with a second-place ranking due to a production per floral unit of ().
No narrative description available for this taxon yet.
Size & morphology30
Life cycle & reproduction16
Diet & foraging2
Habitat & environment15
Physiology & chemistry10
Other traits2
Compounds documented for Cirsium arvense across natural-product and food-composition databases — not just the ~150 nutrients on a classic label ("nutritional dark matter").
Compound class profile5 classes
Documented compounds59 total
| Compound | Class | Amount | Source |
|---|---|---|---|
| (1E,5R,10S,11S,14S)-4-ethyl-10,14-dihydroxy-5-[(1S)-1-hydroxyethyl]-11-methoxy-12-oxa-4-azatricyclo[9.2.1.02,5]tetradec-1-en-3-one | present | LOTUS | |
| (1E,5R,11S,12S,15S)-4-ethyl-11,15-dihydroxy-12-methoxy-5-methyl-13-oxa-4-azatricyclo[10.2.1.02,5]pentadec-1-en-3-one | present | NPASS | |
| (1E,5R,9S,10S,13S)-4-ethyl-9,13-dihydroxy-10-methoxy-5-methyl-11-oxa-4-azatricyclo[8.2.1.02,5]tridec-1-en-3-one | present | LOTUS | |
| (1E,7S,12S,13S,16S)-12,16-dihydroxy-13-methoxy-4,7-dimethyl-14-oxa-4-azatricyclo[11.2.1.02,7]hexadec-1-ene-3,8-dione | present | LOTUS | |
| (1R,3Z,6S,7R,8S,9R,10R,16R,18E,20R,21S,23S,24R,25S)-25-benzyl-7,8,21-trihydroxy-10-methoxy-16,23-dimethyl-22-methylidene-2,12,27-trioxo-26-azapentacyclo[18.7.0.01,24.05,11.06,9]heptacosa-3,5(11),18-triene-6-carboxamide | present | LOTUS | |
| (1S,2R,7S,8E,10R)-7-hydroxy-2-methyl-3,11-dioxabicyclo[8.1.0]undec-8-en-4-one | present | LOTUS | |
| (1S,4E,6R,12E,14S,15S,17R,18S,19S,20S)-20-benzyl-6-hydroxy-17,18-dimethyl-2,16-dioxa-21-azatetracyclo[12.8.0.01,19.015,17]docosa-4,12-diene-3,22-dione | present | LOTUS | |
| (1S,4Z,7S,8R,9R,10R,11S,17R,19E,21S,22S,24S,25S,26S)-26-benzyl-8,9,22-trihydroxy-11-methoxy-17,24-dimethyl-23-methylidene-3,13,28-trioxo-2-oxa-27-azapentacyclo[19.7.0.01,25.06,12.07,10]octacosa-4,6(12),19-triene-7-carboxamide | present | LOTUS | |
| (1Z,6E)-gamma-humulene | present | LOTUS | |
| (2-Hexanoyloxy-3-tetradecanoyloxypropyl) tetradecanoate | present | LOTUS |
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 Cirsium arvense 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 Cirsium arvense 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 3484×GoaT · DTOL Flowering Plants Estimates Kew · GoaT · Tree of Sex Database · CCDB · slov-fl +19
2n 685×CCDB · poland · CCDB · ipcn-api-dl · CCDB · CromoCat 2015 +1
2n 02×CCDB · CromoCat 2015
2n 281×CCDB · ipcn-api-dl
2n 511×CCDB · CromoCat 2015
n 177×CCDB · ipcn-api-dl · CCDB · book-ipcn67-71 · CCDB · CromoCat 2015 +1
n 181×CCDB · CromoCat 2015
diploid inferred1×PloiDB · genus-scale
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 type1 338 837 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 institutions205 of 373 geolocated
Institutions and collections holding physical, vouchered specimens of this species — click a row to fly to it on the map.
| Institution | Specimens |
|---|---|
| Uniwersytet Wrocławskilocation not on record | 14 345 |
| BFLlocation not on record | 667 |
| Instytut Ochrony Przyrody Polskiej Akademii Nauklocation not on record | 428 |
| BIO-UNIPIlocation not on record | 420 |
| Moscow State Universitylocation not on record | 397 |
| LDlocation not on record | 303 |
| Salzburg, AT | 294 |
| Olocation not on record | 263 |
| Bronx, US | 231 |
| St. Paul, US | 222 |
| Uniwersytet Warszawskilocation not on record | 211 |
| Görlitz, DE | 209 |
| MeiseBGlocation not on record | 201 |
| Madison, US | 195 |
| South Kensington, GB | 192 |
| Philadelphia, US | 190 |
| Wuzhou, CN | 184 |
| Kuopio, FI | 171 |
| Oulu, FI | 166 |
| Oregon State Universitylocation not on record | 157 |
| Karlsruhe, DE | 151 |
| GMBAlocation not on record | 116 |
| Chicago, US | 111 |
| Vancouver, CA | 109 |
| TROMlocation not on record | 107 |
| Chongqing Museumlocation not on record | 107 |
| Garðabær, IS | 106 |
| Berlin, DE | 102 |
| GJOlocation not on record | 100 |
| Oskarshamn, SE | 99 |
| GBS RAN - Glavny Botanichesky Sad Rossijskoj Akademii Nauklocation not on record | 98 |
| Christchurch, NZ | 98 |
| Bergen, NO | 97 |
| Denver, US | 97 |
| Trondheim, NO | 93 |
| SLU Artdatabankenlocation not on record | 91 |
| Canadian Department of Agriculturelocation not on record | 91 |
| Turku, FI | 88 |
| WTUlocation not on record | 83 |
| Adam Mickiewicz University in Poznańlocation not on record | 83 |
| Pullman, US | 82 |
| Musee des Dinosaures d'Esperaza (Aude)location not on record | 80 |
| Québec, CA | 70 |
| Ernst-Moritz-Arndt-Universitat Greifswaldlocation not on record | 68 |
| Ann Arbor, US | 67 |
| Corvallis, US | 62 |
| València, ES | 59 |
| GZUlocation not on record | 59 |
| Bloomington, US | 58 |
| Saint John, CA | 58 |
| Jyväskylä, FI | 56 |
| Université Lavallocation not on record | 55 |
| Provincia di Livornolocation not on record | 54 |
| University of Wisconsinlocation not on record | 53 |
| Chadron, US | 53 |
| MAlocation not on record | 52 |
| BDBClocation not on record | 52 |
| Bern, CH | 51 |
| QAUlocation not on record | 51 |
| Acadia Universitylocation not on record | 50 |
| University of Alberta Museumslocation not on record | 50 |
| WINlocation not on record | 49 |
| Montréal, CA | 47 |
| Moscow, US | 46 |
| Pamplona, ES | 45 |
| Entomological Society of Latvialocation not on record | 45 |
| New Brunswick, US | 45 |
| McWane Science Centerlocation not on record | 45 |
| Universidad del Pais Vasco (UPV/EHU)location not on record | 44 |
| KMNlocation not on record | 43 |
| Barcelona, ES | 42 |
| BRNUlocation not on record | 40 |
| Burlington, US | 38 |
| Missoula, US | 38 |
| Saint Louis, US | 38 |
| Vitoria, ES | 37 |
| Museo civico La Terra e l'Uomo di Crocetta del Montellolocation not on record | 36 |
| Beijing, CN | 34 |
| University of New Hampshirelocation not on record | 33 |
| Bozeman, US | 32 |
| Wlocation not on record | 32 |
| Uppsala, SE | 31 |
| Green Bay, US | 30 |
| Auckland, NZ | 30 |
| DOI/NPS, Greenbelt Parklocation not on record | 30 |
| Spearfish, US | 29 |
| DOI/NPS, Little Rock Central High School National Historic Sitelocation not on record | 29 |
| Allentown, US | 29 |
| University of Stellenboschlocation not on record | 29 |
| Pocatello, US | 28 |
| Mlocation not on record | 28 |
| UGentlocation not on record | 27 |
| BClocation not on record | 26 |
| Provo, US | 24 |
| 24 | |
| Yangling, CN | 24 |
| Tallinn, EE | 23 |
| Millersville, US | 23 |
| Brookings, US | 22 |
| San Sebastián, ES | 22 |
| College Park, US | 22 |
| TUR-Alocation not on record | 22 |
| Riverside, US | 21 |
| Museum Ludovicae Ulricae, Zoology Institute of the University of Uppsalalocation not on record | 20 |
| Madrid, ES | 20 |
| New Haven, US | 20 |
| Davis, US | 19 |
| Whitewater, US | 19 |
| Frankfurt am Main | 19 |
| Fargo, US | 19 |
| Logan, US | 18 |
| Flagstaff, US | 18 |
| Urumqi, CN | 18 |
| Arcata, US | 18 |
| Toronto, CA | 17 |
| Porvoo, FI | 17 |
| Albuquerque, US | 17 |
| Salamanca, ES | 15 |
| Palacký University in Olomouclocation not on record | 15 |
| Dekalb, US | 15 |
| Helsinki, FI | 14 |
| Granada, ES | 14 |
| Wellington, NZ | 14 |
| Jiangxi College of Educationlocation not on record | 14 |
| Jaén, ES | 14 |
| Caldwell, US | 14 |
| Williamsburg, US | 14 |
| Minia, EG | 14 |
| CJBGlocation not on record | 13 |
| Pamplona, ES | 13 |
| Victoria, CA | 13 |
| Academy of Sciences of the Republic of Uzbekistanlocation not on record | 12 |
| College of the Atlantic, Museumlocation not on record | 12 |
| Natural History Museum Rotterdamlocation not on record | 12 |
| Portland, US | 12 |
| CICYTEXlocation not on record | 11 |
| Porrentruy, CH | 11 |
| The Tula Region State Institution of Culture "Tula Museum Association"location not on record | 11 |
| Uniwersytet Śląski w Katowicachlocation not on record | 11 |
| Staten Island, US | 11 |
| Bangkok, TH | 11 |
| IDElocation not on record | 11 |
| Anchorage, US | 10 |
| Conservatoire botanique national du Bassin parisienlocation not on record | 10 |
| Lanzhou, CN | 10 |
| San Luis Obispo, US | 10 |
| Mount Annan, AU | 10 |
| Department of Plant Resources, National Herbarium and Plant Laboratorieslocation not on record | 10 |
| Institut und Museum fuer Geologie und Palaeontologielocation not on record | 10 |
| Zürich, CH | 10 |
| Uniwersytet Opolskilocation not on record | 9 |
| Museo Entomologico de Leonlocation not on record | 9 |
| Chapel Hill, US | 9 |
| Tula State Lev Tolstoy Pedagogical Universitylocation not on record | 9 |
| Boise, US | 9 |
| Phyletisches Museum Jenalocation not on record | 9 |
| Kew, GB | 8 |
| Alicante, ES | 8 |
| Rotorua, NZ | 8 |
| Claremont, US | 8 |
| The State Museum-Preserve "The Kulikovo pole"location not on record | 8 |
| Philadelphia, US | 8 |
| CASlocation not on record | 7 |
| Tilburg, NL | 7 |
| WNNUlocation not on record | 7 |
| Bourges, FR | 7 |
| Chicago, US | 7 |
| Museum of the Rockieslocation not on record | 7 |
| Angwin, US | 7 |
| Dresden, DE | 7 |
| Mount Pleasant, US | 7 |
| Pittsburg, US | 7 |
| Inner Mongolia Universitylocation not on record | 6 |
| Tartu, EE | 6 |
| Morgantown, US | 6 |
| Chicago, US | 6 |
| Podgorica, ME | 6 |
| Tula State Universitylocation not on record | 6 |
| Museo Achille Folettolocation not on record | 6 |
| Lincoln, US | 6 |
| OLAlocation not on record | 6 |
| USFS/BHSClocation not on record | 6 |
| BSBIlocation not on record | 6 |
| SZUlocation not on record | 6 |
| Orem, US | 6 |
| Austin, US | 5 |
| University of Lethbridgelocation not on record | 5 |
| SIHUlocation not on record | 5 |
| Paris, FR | 5 |
| PrivatHerblocation not on record | 5 |
| ASUlocation not on record | 5 |
| University of Guelph, OAC Herbariumlocation not on record | 5 |
| Whitehorse, CA | 5 |
| QVMAGlocation not on record | 5 |
| Otaru, JP | 5 |
| Durango, US | 5 |
| Rovaniemi, FI | 5 |
| Cheney, US | 5 |
| Government College University Lahore, Dr. Sultan Ahmad Herbariumlocation not on record | 5 |
| Emporia, US | 4 |
| Waverly, US | 4 |
| DBF-NHMDlocation not on record | 4 |
| Stockholm, SE | 4 |
| Hudson, US | 4 |
| Eastern Nevada Landscape Coalitionlocation not on record | 4 |
| Tromso University Museumlocation not on record | 4 |
| University of Copenhagen, Natural History Museum of Denmark, Herbarium Clocation not on record | 4 |
| Royal Botanical Gardenslocation not on record | 4 |
| Santa Barbara, US | 4 |
| Johnson City, US | 4 |
| Davenport, US | 4 |
| DASSHlocation not on record | 4 |
| Northridge, US | 4 |
| Staatliches Museum fuer Naturkunde Karlsruhe (State Museum of Natural History)location not on record | 4 |
| KIRMlocation not on record | 4 |
| Badajoz, ES | 4 |
| Bandelier National Monumentlocation not on record | 4 |
| Xiamen, CN | 4 |
| EL PASO, US | 4 |
| Frauenfeld, CH | 4 |
| JBSlocation not on record | 3 |
| Philadelphia, US | 3 |
| Xining, CN | 3 |
| Macomb, US | 3 |
| Zürich, CH | 3 |
| Science Museum of Minnesotalocation not on record | 3 |
| Rocky Mountain Biological Laboratorylocation not on record | 3 |
| Florida Museum of Natural History- Zoology, Paleontology & Paleobotanylocation not on record | 3 |
| SWlocation not on record | 3 |
| Minot State Universitylocation not on record | 3 |
| Córdoba, ES | 3 |
| Keene State Universitylocation not on record | 3 |
| Hunan Geological Museumlocation not on record | 3 |
| VALElocation not on record | 3 |
| UIBlocation not on record | 3 |
| Coimbra, PT | 3 |
| San Diego, US | 3 |
| Glarus, CH | 3 |
| Servico de Microbiologia e Imunologialocation not on record | 3 |
| Fairfax, US | 3 |
| Ashland, US | 3 |
| Ypsilanti, US | 3 |
| Columbia, US | 3 |
| Tempe, US | 3 |
| University of British Columbialocation not on record | 2 |
| US | 2 |
| EEZA-CSIClocation not on record | 2 |
| Tacoma, US | 2 |
| ISAlocation not on record | 2 |
| Naturalis Biodiversity Centerlocation not on record | 2 |
| Trois-Rivières, CA | 2 |
| Brisbane, AU | 2 |
| BGBMlocation not on record | 2 |
| HJAEFlocation not on record | 2 |
| Oswego, US | 2 |
| US | 2 |
| Mississippi State, US | 2 |
| nbflocation not on record | 2 |
| Kushiro City Museumlocation not on record | 2 |
| Washington, US | 2 |
| Stellenbosch University, DST- NRF Centre of Excellence for Invasion Biologylocation not on record | 2 |
| Pretoria, ZA | 2 |
| cslocation not on record | 2 |
| Hobart, AU | 2 |
| Ivano-Frankove, UA | 2 |
| John May Museum of Natural Historylocation not on record | 2 |
| Grand Junction, US | 2 |
| Sion, CH | 2 |
| B.A. Bennett Herbariumlocation not on record | 2 |
| Turlock, US | 2 |
| Göteborg, SE | 2 |
| National Museum Waleslocation not on record | 2 |
| Sevilla, ES | 2 |
| LPMMBHlocation not on record | 2 |
| Chiba, JP | 2 |
| Uniwersytet Rolniczy im. Hugona Kołłątaja w Krakowielocation not on record | 2 |
| Museo civico di Storia naturale Giacomo Doria di Genova | Giacomo Doria Natural History Museum in Genoalocation not on record | 2 |
| Miami, US | 2 |
| Peking Universitylocation not on record | 2 |
| Hamilton, US | 2 |
| DOI/NPS, Mount Rainier National Parklocation not on record | 2 |
| Kunming, CN | 2 |
| Winterthur, CH | 2 |
| Kathmandu, NP | 2 |
| IWEP FEB RASlocation not on record | 2 |
| Xinjiang Institute of Ecology and Geography, Chinese Academy of Scienceslocation not on record | 2 |
| Phoenix, US | 2 |
| Salvador, BR | 2 |
| Harrisonburg, US | 2 |
| Palmerston North, NZ | 2 |
| Tomioka, JP | 2 |
| Dehra Dun, IN | 2 |
| Fribourg, CH | 1 |
| DOI/NPS, San Juan Island National Historical Parklocation not on record | 1 |
| ESP003location not on record | 1 |
| LfUlocation not on record | 1 |
| University of South Dakotalocation not on record | 1 |
| Bureau of Land Management, Caliente Field Officelocation not on record | 1 |
| NMBU:MINAlocation not on record | 1 |
| DOI/NPS, Craters of the Moon National Monument & Preservelocation not on record | 1 |
| Irvine, US | 1 |
| Mexico City, MX | 1 |
| Gijón, ES | 1 |
| Maryland Department of Natural Resourceslocation not on record | 1 |
| SVN019location not on record | 1 |
| Meguro Parasitological Museumlocation not on record | 1 |
| Bruce Peninsula National Parklocation not on record | 1 |
| Hazara Universitylocation not on record | 1 |
| Clemson, US | 1 |
| Institute for Agricultural Bacteriology and Fermentation Biologylocation not on record | 1 |
| Portland, US | 1 |
| DOI/NPS, Colonial National Historical Parklocation not on record | 1 |
| Dover, US | 1 |
| USFSlocation not on record | 1 |
| AUAlocation not on record | 1 |
| SGAV-and-NHMDlocation not on record | 1 |
| Fukushima Universitylocation not on record | 1 |
| Chongqing, CN | 1 |
| Uniwersytet Marii Curie-Skłodowskiejlocation not on record | 1 |
| Bothell, US | 1 |
| National Institute of Biological Resourceslocation not on record | 1 |
| SEFlocation not on record | 1 |
| Nagano City, JP | 1 |
| DOI/FWS, Kenai National Wildlife Refugelocation not on record | 1 |
| Portland, US | 1 |
| Durham, US | 1 |
| Pondicherry, IN | 1 |
| Qarshi Botanical Gardenlocation not on record | 1 |
| University of Agriculture, Faisalabadlocation not on record | 1 |
| Royal Botanic Garden Edinburghlocation not on record | 1 |
| Yellowstone National Park Herbariumlocation not on record | 1 |
| STNFlocation not on record | 1 |
| Dhaka, BD | 1 |
| Prioksko-Terrasnyi Biosphere Reservelocation not on record | 1 |
| Knoxville, US | 1 |
| Herbario Universidad de Concepciónlocation not on record | 1 |
| IPE-CSIClocation not on record | 1 |
| Bend, US | 1 |
| Awka, NG | 1 |
| McGill University, Herbariumlocation not on record | 1 |
| Guangzhou, CN | 1 |
| Santa Cruz, US | 1 |
| Conway, US | 1 |
| Musée des Confluenceslocation not on record | 1 |
| Weber State Universitylocation not on record | 1 |
| Forest Survey and Design Institute, Forestry Administrative Bureau of Daxinganlinglocation not on record | 1 |
| UoB-IBlocation not on record | 1 |
| Lausanne, CH | 1 |
| Kingston, US | 1 |
| Banyoles, ES | 1 |
| Honolulu, US | 1 |
| Muzaffarabad, PK | 1 |
| PRClocation not on record | 1 |
| Muséum Henri Lecoqlocation not on record | 1 |
| Adelaide, AU | 1 |
| Montréal, CA | 1 |
| UMKClocation not on record | 1 |
| Kensington, AU | 1 |
| Riyadh Municipalitylocation not on record | 1 |
| ZRC-SAZUlocation not on record | 1 |
| IPA/SPlocation not on record | 1 |
| Memorial University of Newfoundlandlocation not on record | 1 |
| Mohonk Preservelocation not on record | 1 |
| San Jose, US | 1 |
| NSW Dept of Planning, Industry and Environmentlocation not on record | 1 |
| Forssa, FI | 1 |
| Monastir, TN | 1 |
| Taipei, TW | 1 |
| Sant Julià de Lòria, AD | 1 |
| National Botanic Garden of Waleslocation not on record | 1 |
| Namur, BE | 1 |
| Cslocation not on record | 1 |
| Nijmegen, NL | 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 Cirsium arvense 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.