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 Pseudognaphalium stramineum has left across the world's sequence archives.
At a glance
DNA specimens8
Marker genes4
GenBank sequences4
eDNA detections3
Countries2
The DNA barcodea real sequence read deposited for this species
★ 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.
★rbcL2★rbcLa★ITS2★ITS2
plant barcodefungal barcode
06Genome at a glanceCCDB
The complete instruction manualPseudognaphalium stramineum 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.
Chromosomes2n = 28 n = 14
Ploidypolyploid inferred
Chromosome-count records — grouped by value · 2n = full set, n = gamete · click a value for sources & references
2n 281×CCDB · eflora
CCDB · eflora
n 143×CCDB · ipcn-api-dl
CCDB · ipcn-api-dl — Keil, D. J. & D. J. Pinkava. 1976. Chromosome counts and taxonomic notes for Compositae from the United States and Mexico. Amer. J. Bot. 63: 1393–1403.
CCDB · ipcn-api-dl — Sundberg, S. D. & M. O. Dillon. 1986. Chromosome Number Reports 91. Taxon 35: 409–410.
CCDB · ipcn-api-dl — Keil, D. J. & T. F. Stuessy. 1977. Chromosome counts of Compositae from Mexico and the United States. Amer. J. Bot. 64: 791–798.
Ploidy records — measured levels and diploid/polyploid inferences · click for sources
Human sightings and records, or camera-trap / sensor detections — someone (or a device) saw or captured the species in the wild.
Coordinate accuracy93% within 1 km
≤100 m 1 259≤1 km 139≤10 km 43>10 km 69
1 510 georeferenced · 394 without coordinates
Open the mapobservation + sensor1 904
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.
Coordinate accuracy77% within 1 km
≤100 m 180≤1 km 160≤10 km 94>10 km 8
442 georeferenced · 470 without coordinates
Open the institutions mapphysical evidence912
Wildobservation + sensor
Human sightings and records, or camera-trap / sensor detections — someone (or a device) saw or captured the species in the wild.
10Collections & institutions
Holding institutions46 of 61 geolocated
Institutions and collections holding physical, vouchered specimens of this species — click a row to fly to it on the map.
Institution
Specimens
San Diego, US
269
Austin, US
76
Claremont, US
73
Corvallis, US
50
Davis, US
42
Santa Barbara, US
33
Mexico City, MX
31
Arcata, US
30
DOI/NPS, Little Rock Central High School National Historic Sitelocation not on record
29
CASlocation not on record
28
WTUlocation not on record
27
US
27
Severin-McDaniel Insect Collectionlocation not on record
23
Chadron, US
18
Wuzhou, CN
14
Austin, US
13
San Luis Obispo, US
13
La Paz, MX
11
Guasave, MX
8
Boise, US
6
Irvine, US
6
Vancouver, CA
5
Toluca, MX
5
Santa Cruz, US
4
EL PASO, US
4
Bronx, US
4
Los Angeles, US
4
Pocatello, US
4
Caldwell, US
3
San Jose, US
3
ASUlocation not on record
3
Hermosillo, MX
3
Provo, US
3
Turlock, US
3
University of British Columbia, Herbariumlocation not on record
3
Canadian Department of Agriculturelocation not on record
3
Northridge, US
2
University of Stellenboschlocation not on record
2
BClocation not on record
2
Tacoma, US
2
Beijing, CN
1
Victoria, CA
1
Long Beach, US
1
Fort Bragg, US
1
Phoenix, US
1
Montréal, CA
1
Flagstaff, US
1
INFlocation not on record
1
Denver, US
1
The University of Arizonalocation not on record
1
Anchorage, US
1
Saint Louis, US
1
Fullerton, US
1
Calabar, NG
1
Pomona Collegelocation not on record
1
Zacatecas, MX
1
Facultad de Zootecnia y Ecología, Universidad Autónoma de Chihuahualocation not on record
1
New Mexico Museum of Natural History and Sciencelocation not on record
1
Albuquerque, US
1
Ensenada, MX
1
San Diego Natural History Museumlocation not on record
1
61 institutions · 910 of 912 vouchered records shown · 2 without an institution code
09Environmental DNA3 detections
Where the DNA of Pseudognaphalium stramineum 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
Detections DNA found3
Studies independent surveys1
Countries2
Signal confidence: weakweighed across independent studies, places & mapped detections
Where its DNA was found
0 of 3 detections have coordinates
Open the map2 countries0
cleared rubbly area in vacant lotRiparian with Quercus agrifolia var. agrifol…roadside
How strong is each trace?
DNA read depthRead counts were not reported for this species — the map shows presence only, not how strong each trace was.
Modelled climatemodelled
−15°Ctemperature across detection sites+40°C
Temperature median17.1 °C 12.0–17.1
Seasonal swing summer↔winter9.50 °C
Max temp (day)19.9 °C 13.6–21.6
Min temp (night)13.1 °C 10.3–14.6
Precipitation25.5 mm/mo 9.30–81.4
Air humidity61.9 % 59.1–63.2
Moisture balance34.0 mm/mo
Vapour deficit743 Pa 525–800
Wind speed3.70 m/s
Cloud cover32.7 % 26.6–44.8
CHELSA 1981–2010, ~9 km grid, at location & month of 3 detection points · median with p10–p90 · reflects where sampling happened, not only the true niche
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.
BioWikiNetmultilingual Wikipediamultilingual↗
GBIFGlobal Biodiversity Information Facility2 816 records↗
ENAEuropean Nucleotide Archive · EMBL-EBI3 eDNA detections↗
BOLD SystemsCentre for Biodiversity Genomics8 specimens↗
NCBIUS National Library of Medicinesequences↗
GRIN TaxonomyUSDA-ARSdistribution & uses↗
Open Tree of LifeOpenTreephylogeny backbone↗
CCDBChromosome Counts DB · Tel Aviv U.genome & karyotype↗
PloiDBPloidy Databasegenome & karyotype
GLoBIGlobal Biotic Interactionsbiotic interactions↗