Centaurea diffusa
Lam. · speciesAt a glance
Sources13 archives
Databases and archives Centaurea diffusa's data was compiled from.
WikipediaWikimedia Foundation8 languages↗
BioWikiNetmultilingual Wikipediamultilingual↗
GBIFGlobal Biodiversity Information Facility9 219 records↗
ENAEuropean Nucleotide Archive · EMBL-EBI29 eDNA detections↗
BOLD SystemsCentre for Biodiversity Genomics91 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↗
PloiDBPloidy Databasegenome & karyotype
GLoBIGlobal Biotic Interactionsbiotic interactions↗Every layer below draws on the sources above — open one to explore it, or use ← → to move between tabs.
Centaurea diffusa, also known as diffuse knapweed, white knapweed or tumble knapweed, is a member of the genus Centaurea in the family Asteraceae. This species is common throughout western North America but is not actually native to the North American continent, but to the eastern Mediterranean.
No narrative description available for this taxon yet.
Size & morphology17
Life cycle & reproduction12
Diet & foraging1
Habitat & environment10
Physiology & chemistry7
Other traits1
Compounds documented for Centaurea diffusa across natural-product and food-composition databases — not just the ~150 nutrients on a classic label ("nutritional dark matter").
Compound class profile5 classes
Documented compounds86 total
| Compound | Class | Amount | Source |
|---|---|---|---|
| (22r)-22-Hydroxycholes-terol | present | NPASS | |
| (2R,3R,4S,5S,6R)-2-[(2R)-4-[(1R,2R,4S,6R,7S,8R,9S,12S,13R,14R,16R)-14-[(2R,3R,4S,5R,6R)-3-[(2S,3R,4R,5S,6S)-3,5-dihydroxy-6-methyl-4-[(2S,3R,4S,5S,6R)-3,4,5-trihydroxy-6-(hydroxymethyl)oxan-2-yl]oxyoxan-2-yl]oxy-4,5-dihydroxy-6-(hydroxymethyl)oxan-2-yl]oxy-16-hydroxy-6-methoxy-7,9,13-trimethyl-5-oxapentacyclo[10.8.0.02,9.04,8.013,18]icos-18-en-6-yl]-2-methylbutoxy]-6-(hydroxymethyl)oxane-3,4,5-triol | present | NPASS | |
| (2R,3S,4S,5R,6R)-2-(hydroxymethyl)-6-[[(2R,3S,4S,5R,6S)-3,4,5-trihydroxy-6-[(1S,2S,3'S,4S,5'R,6S,7S,8R,9S,12S,13R,16S)-16-hydroxy-5',7,9,13-tetramethylspiro[5-oxapentacyclo[10.8.0.02,9.04,8.013,18]icos-18-ene-6,2'-oxane]-3'-yl]oxyoxan-2-yl]methoxy]oxane-3,4,5-triol | present | NPASS | |
| (2S,3R,4R,5R,6S)-2-[(2R,3R,4S,5R,6R)-4,5-dihydroxy-2-[[(1R,2R,4S,6R,7S,8R,9S,12S,13R,14R,16R)-16-hydroxy-6-methoxy-7,9,13-trimethyl-6-[(3R)-3-methyl-4-[(2R,3R,4S,5S,6R)-3,4,5-trihydroxy-6-(hydroxymethyl)oxan-2-yl]oxybutyl]-5-oxapentacyclo[10.8.0.02,9.04,8.013,18]icos-18-en-14-yl]oxy]-6-(hydroxymethyl)oxan-3-yl]oxy-6-methyloxane-3,4,5-triol | present | NPASS | |
| (2S,3R,4R,5R,6S)-2-[(2R,3R,4S,5R,6R)-4,5-dihydroxy-6-(hydroxymethyl)-2-[(1R,2S,4S,5'R,6R,7S,8R,9S,12R,13R,14R,16R)-16-hydroxy-5',7,9,13-tetramethylspiro[5-oxapentacyclo[10.8.0.02,9.04,8.013,18]icos-18-ene-6,2'-oxane]-14-yl]oxyoxan-3-yl]oxy-6-methyloxane-3,4,5-triol | present | NPASS | |
| (2S,3R,4R,5R,6S)-2-[(2S,3R,4S,5S)-2-[[(1S,2S,4S,6R,7S,8R,9S,12S,13R,14R,16R)-6,16-dihydroxy-7,9,13-trimethyl-6-[(3R)-3-methyl-4-[(2R,3R,4S,5S,6R)-3,4,5-trihydroxy-6-(hydroxymethyl)oxan-2-yl]oxybutyl]-5-oxapentacyclo[10.8.0.02,9.04,8.013,18]icos-18-en-14-yl]oxy]-4,5-dihydroxyoxan-3-yl]oxy-6-methyloxane-3,4,5-triol | present | NPASS | |
| (2S,3R,4R,5R,6S)-2-[(2S,3R,4S,5S)-2-[[(1S,2S,4S,6R,7S,8R,9S,12S,13R,14R,16R)-6,16-dihydroxy-7,9,13-trimethyl-6-[3-[[(2R,3R,4S,5S,6R)-3,4,5-trihydroxy-6-(hydroxymethyl)oxan-2-yl]oxymethyl]but-3-enyl]-5-oxapentacyclo[10.8.0.02,9.04,8.013,18]icos-18-en-14-yl]oxy]-4,5-dihydroxyoxan-3-yl]oxy-6-methyloxane-3,4,5-triol | present | NPASS | |
| (2S,3R,4R,5R,6S)-2-[(2S,3R,4S,5S)-4,5-dihydroxy-2-[(1S,2S,4S,5'R,6R,7S,8R,9S,12S,13R,14R,16R)-16-hydroxy-5',7,9,13-tetramethylspiro[5-oxapentacyclo[10.8.0.02,9.04,8.013,18]icos-18-ene-6,2'-oxane]-14-yl]oxyoxan-3-yl]oxy-6-methyloxane-3,4,5-triol | present | NPASS | |
| (2S,3R,4R,5R,6S)-2-[(2S,3R,4S,5S)-4,5-Dihydroxy-2-[(1S,2S,4S,6R,7S,8R,9S,12S,13R,14R,16R)-16-hydroxy-7,9,13-trimethyl-5'-methylidenespiro[5-oxapentacyclo[10.8.0.02,9.04,8.013,18]icos-18-ene-6,2'-oxane]-14-yl]oxyoxan-3-yl]oxy-6-methyloxane-3,4,5-triol | present | NPASS | |
| (2S,3R,4R,5R,6S)-2-[(2S,3R,4S,5S)-4,5-dihydroxy-2-[[(1S,2S,4S,6R,7S,8R,9S,12S,13R,14R,16R)-16-hydroxy-6-methoxy-7,9,13-trimethyl-6-[3-[[(2R,3R,4S,5S,6R)-3,4,5-trihydroxy-6-(hydroxymethyl)oxan-2-yl]oxymethyl]but-3-enyl]-5-oxapentacyclo[10.8.0.02,9.04,8.013,18]icos-18-en-14-yl]oxy]oxan-3-yl]oxy-6-methyloxane-3,4,5-triol | present | NPASS |
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 Centaurea diffusa 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 Centaurea diffusa 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.
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 1820×CCDB · slov-fl · CCDB · iapt · CCDB · ipcn-api-dl +3
2n 162×CCDB · ipcn-api-dl · CCDB · kew
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 type9 219 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.
Wildobservation + sensor
Human sightings and records, or camera-trap / sensor detections — someone (or a device) saw or captured the species in the wild.
Holding institutions85 of 158 geolocated
Institutions and collections holding physical, vouchered specimens of this species — click a row to fly to it on the map.
| Institution | Specimens |
|---|---|
| Moscow State Universitylocation not on record | 187 |
| Vancouver, CA | 106 |
| Canadian Department of Agriculturelocation not on record | 88 |
| Denver, US | 66 |
| WTUlocation not on record | 62 |
| Victoria, CA | 51 |
| Adam Mickiewicz University in Poznańlocation not on record | 50 |
| Pullman, US | 49 |
| Berlin, DE | 46 |
| BRNUlocation not on record | 44 |
| Bronx, US | 42 |
| Corvallis, US | 36 |
| Musee des Dinosaures d'Esperaza (Aude)location not on record | 29 |
| Flagstaff, US | 28 |
| Uniwersytet Wrocławskilocation not on record | 28 |
| Görlitz, DE | 27 |
| GBS RAN - Glavny Botanichesky Sad Rossijskoj Akademii Nauklocation not on record | 27 |
| LDlocation not on record | 25 |
| Logan, US | 19 |
| Wuzhou, CN | 15 |
| Bozeman, US | 14 |
| IDElocation not on record | 13 |
| Philadelphia, US | 12 |
| San Luis Obispo, US | 12 |
| Provo, US | 11 |
| Riverside, US | 10 |
| Uniwersytet Śląski w Katowicachlocation not on record | 9 |
| Chadron, US | 8 |
| ASUlocation not on record | 8 |
| Staatliches Museum fuer Naturkunde Karlsruhe (State Museum of Natural History)location not on record | 7 |
| SLU Artdatabankenlocation not on record | 7 |
| Tartu, EE | 7 |
| Mlocation not on record | 6 |
| Wlocation not on record | 6 |
| Claremont, US | 6 |
| Olocation not on record | 6 |
| Albuquerque, US | 6 |
| Saint Louis, US | 6 |
| Córdoba, AR | 6 |
| Boise, US | 6 |
| BIO-UNIPIlocation not on record | 6 |
| Missoula, US | 6 |
| Phoenix, US | 5 |
| Chongqing Museumlocation not on record | 5 |
| Whitehorse, CA | 5 |
| MeiseBGlocation not on record | 5 |
| Oulu, FI | 5 |
| DOI/NPS, Greenbelt Parklocation not on record | 5 |
| Museo civico La Terra e l'Uomo di Crocetta del Montellolocation not on record | 5 |
| Davis, US | 5 |
| Tacoma, US | 4 |
| Agriculture and Agri-Food Canada, Vascular Plant Herbariumlocation not on record | 4 |
| València, ES | 4 |
| Institut und Museum fuer Geologie und Palaeontologielocation not on record | 4 |
| DOI/NPS, Little Rock Central High School National Historic Sitelocation not on record | 4 |
| San Diego, US | 4 |
| Henderson, US | 4 |
| Université Lavallocation not on record | 4 |
| Samara National Research Universitylocation not on record | 4 |
| Bern, CH | 4 |
| Portland, US | 4 |
| Arcata, US | 4 |
| BFLlocation not on record | 4 |
| WINlocation not on record | 4 |
| USFSlocation not on record | 4 |
| Oskarshamn, SE | 3 |
| Department of Bacteriology, University of Wisconsinlocation not on record | 3 |
| Podgorica, ME | 3 |
| Finnish Museum of Natural History, Botanical Museumlocation not on record | 3 |
| Moscow, US | 3 |
| Pocatello, US | 3 |
| DOI/NPS, Mount Rainier National Parklocation not on record | 3 |
| Caldwell, US | 3 |
| Emporia, US | 3 |
| Research Collection of B. A. Bennettlocation not on record | 3 |
| Angwin, US | 3 |
| Santa Barbara, US | 3 |
| St. Paul, US | 3 |
| Tula State Lev Tolstoy Pedagogical Universitylocation not on record | 3 |
| DULlocation not on record | 3 |
| Ann Arbor, US | 3 |
| McWane Science Centerlocation not on record | 3 |
| Trois-Rivières, CA | 2 |
| Barcelona, ES | 2 |
| John May Museum of Natural Historylocation not on record | 2 |
| Kew, GB | 2 |
| Madison, US | 2 |
| University of New Hampshirelocation not on record | 2 |
| The Tula Region State Institution of Culture "Tula Museum Association"location not on record | 2 |
| MAlocation not on record | 2 |
| South Kensington, GB | 2 |
| Universidad del Pais Vasco (UPV/EHU)location not on record | 2 |
| CICYTEXlocation not on record | 2 |
| KNFHClocation not on record | 2 |
| Paris, FR | 2 |
| Entomological Society of Latvialocation not on record | 2 |
| San Isidro, AR | 2 |
| CASlocation not on record | 2 |
| Kuopio, FI | 2 |
| Museo Achille Folettolocation not on record | 2 |
| Granada, ES | 2 |
| Burlington, US | 2 |
| Macomb, US | 2 |
| BClocation not on record | 2 |
| SEFlocation not on record | 1 |
| Laboratorio de Ictiologialocation not on record | 1 |
| H-Meierottlocation not on record | 1 |
| Bend, US | 1 |
| GZUlocation not on record | 1 |
| Stockholm, SE | 1 |
| Bangkok, TH | 1 |
| Toronto, CA | 1 |
| PRClocation not on record | 1 |
| Natural History Museum Rotterdamlocation not on record | 1 |
| Keene State Universitylocation not on record | 1 |
| Ashland, US | 1 |
| Feira de Santana, BR | 1 |
| Monastir, TN | 1 |
| Cheney, US | 1 |
| Corrientes, AR | 1 |
| US | 1 |
| CJBGlocation not on record | 1 |
| Austin, US | 1 |
| Universität Erlangen-Nürnberglocation not on record | 1 |
| Meguro Parasitological Museumlocation not on record | 1 |
| University of Stellenboschlocation not on record | 1 |
| Bothell, US | 1 |
| Museum of the Rockieslocation not on record | 1 |
| Frankfurt am Main | 1 |
| Lincoln, US | 1 |
| Dekalb, US | 1 |
| Dresden, DE | 1 |
| Phyletisches Museum Jenalocation not on record | 1 |
| Pamplona, ES | 1 |
| Jena Microbial Resource Collectionlocation not on record | 1 |
| Vitoria, ES | 1 |
| BSBIlocation not on record | 1 |
| Montréal, CA | 1 |
| New Haven, US | 1 |
| Clemson, US | 1 |
| Clocation not on record | 1 |
| Madrid, ES | 1 |
| TROMlocation not on record | 1 |
| STNFlocation not on record | 1 |
| Florida Museum of Natural History- Zoology, Paleontology & Paleobotanylocation not on record | 1 |
| Provincia di Livornolocation not on record | 1 |
| Turku, FI | 1 |
| Columbia, US | 1 |
| University of British Columbialocation not on record | 1 |
| College of the Atlantic, Museumlocation not on record | 1 |
| Salamanca, ES | 1 |
| Lausanne, CH | 1 |
| Durango, US | 1 |
| US | 1 |
| IWEP FEB RASlocation not on record | 1 |
| IPA/SPlocation not on record | 1 |
| Bandelier National Monumentlocation not on record | 1 |
| EL PASO, US | 1 |
Where the DNA of Centaurea diffusa 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.