Cenchrus tribuloides, the dune sandbur, is a grass common along the east coast of the mainland United States as well as Hawaii. It is also known as the sanddune sandbur, long-spine sandbur or sand-dune sandspur and is common in sandy, marshy, or loosely forested areas. It differs from C. spinifex in its larger spikelets and smaller number of spikelets per fascicle, and from C. longispinus in its densely pubescent fascicles, fewer bristles, and wider inner bristles.
No narrative description available for this taxon yet.
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 Cenchrus tribuloides has left across the world's sequence archives.
At a glance
DNA specimens19
Marker genes4
eDNA detections5
Countries1
Marker genes sequenced
★ 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.
★matK★rbcL★ITS2trnH-psbA
plant barcodefungal barcodemarker
06Genome at a glanceCCDB
The complete instruction manualCenchrus tribuloides 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.
Human sightings and records, or camera-trap / sensor detections — someone (or a device) saw or captured the species in the wild.
Coordinate accuracy95% within 1 km
≤100 m 83≤1 km 55≤10 km 1>10 km 6
145 georeferenced · 27 without coordinates
Open the mapobservation + sensor172
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 accuracy26% within 1 km
≤100 m 15≤1 km 52≤10 km 156>10 km 33
256 georeferenced · 185 without coordinates
Open the institutions mapphysical evidence441
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 institutions53 of 86 geolocated
Institutions and collections holding physical, vouchered specimens of this species — click a row to fly to it on the map.
Institution
Specimens
Bronx, US
47
Philadelphia, US
42
Williamsburg, US
30
College Park, US
26
University of Stellenboschlocation not on record
21
Bangkok, TH
19
Chongqing Museumlocation not on record
19
New Haven, US
12
Norfolk, US
11
Wuzhou, CN
10
Bloomington, US
10
Jena Microbial Resource Collectionlocation not on record
9
Chapel Hill, US
8
GAlocation not on record
7
Valdosta State Universitylocation not on record
6
Millersville, US
6
Tampa, US
6
Kew, GB
6
Jackson, US
5
Saint Louis, US
5
Mississippi State, US
4
Adam Mickiewicz University in Poznańlocation not on record
4
Logan, US
4
Dover, US
4
Brasília, BR
4
Uppsala, SE
4
Tuscaloosa, US
4
Knoxville, US
3
Albuquerque, US
3
Auckland, NZ
3
Miami, US
2
US
2
Université de Bordeauxlocation not on record
2
Mexico City, MX
2
Burlington, US
2
University of Southern Mississippilocation not on record
2
University of North Carolina at Pembrokelocation not on record
2
Columbia, US
2
Denver, US
2
LDlocation not on record
2
Davenport, US
2
Ciudad de México, MX
2
Québec, CA
2
Fort Worth, US
2
Tall Timbers Research Stationlocation not on record
2
Bern, CH
2
DOI/NPS, Mississippi National River & Recreation Arealocation not on record
2
Fredericksburg, US
2
Durango, MX
2
San Jose State University, Museum of Birds and Mammalslocation not on record
2
Fairfax, US
2
Blumenau, BR
2
Clemson, US
2
Whitehorse, CA
1
MCNAMlocation not on record
1
JBRJlocation not on record
1
Armidale, AU
1
Washington, US
1
DOI/NPS, Little Rock Central High School National Historic Sitelocation not on record
1
Paris, FR
1
Missoula, US
1
Long Beach, US
1
ASUlocation not on record
1
AUAlocation not on record
1
Arizona State University Biocollectionslocation not on record
1
Ciudad de México, MX
1
North Carolina Museum of Natural Scienceslocation not on record
1
Chicago, US
1
Northridge, US
1
University of South Carolina Salkehatchielocation not on record
1
UFMSlocation not on record
1
IPA/SPlocation not on record
1
USP-IBlocation not on record
1
MAlocation not on record
1
Ivano-Frankivsk, UA
1
Museo Entomologico de Leonlocation not on record
1
US
1
BAYLUlocation not on record
1
Ensenada, MX
1
Lord Fairfax Community Collegelocation not on record
1
GJOlocation not on record
1
Florida Museum of Natural History- Zoology, Paleontology & Paleobotanylocation not on record
1
DOI/NPS, Greenbelt Parklocation not on record
1
Podgorica, ME
1
Centro de Pesquisas Agropecuarias do Tropico Umidolocation not on record
1
Wlocation not on record
1
86 institutions · 421 of 441 vouchered records shown · 20 without an institution code
09Environmental DNA5 detections
Where the DNA of Cenchrus tribuloides 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 found5
Studies independent surveys1
Signal confidence: weakweighed across independent studies, places & mapped detections
Where its DNA was found
0 of 5 detections have coordinates
Open the map0 countries0
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.
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.
WikipediaWikimedia Foundation2 languages↗
BioWikiNetmultilingual Wikipediamultilingual↗
GBIFGlobal Biodiversity Information Facility613 records↗
ENAEuropean Nucleotide Archive · EMBL-EBI5 eDNA detections↗
BOLD SystemsCentre for Biodiversity Genomics19 specimens↗
GRIN TaxonomyUSDA-ARSdistribution & uses↗
Open Tree of LifeOpenTreephylogeny backbone↗
CCDBChromosome Counts DB · Tel Aviv U.genome & karyotype↗
PloiDBPloidy Databasegenome & karyotype
Paleobiology DatabasePBDB consortiumfossil record↗
WikidataWikimedia Foundationstructured facts↗
GLoBIGlobal Biotic Interactionsbiotic interactions↗