Scleropogon is a monotypic genus of grass which includes the sole species Scleropogon brevifolius, or burrograss. This grass is found in two areas of the world, in North America from the southwestern United States to central Mexico and in South America in Chile and Argentina. This is a perennial mat-forming grass with sharp, tufted leaves and firm awns. This grass may be dioecious, with staminate and pistillate plants growing in separate colonies.
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 Scleropogon brevifolius has left across the world's sequence archives.
At a glance
DNA specimens5
Marker genes4
GenBank sequences8
eDNA detections5
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.
★matK2★rbcL1★ITS5★ITS2
plant barcodefungal barcode
06Genome at a glanceCCDB
The complete instruction manualScleropogon brevifolius 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.
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
DNA clock origin16.1 Ma TimeTree
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.
DNA clock origin
08Occurrence & distribution
Record type1 009 records
Wild obs. + sensor237
Museum / vouchered770
Other2
Origin
Native32
Range
Area of Occupancy AOO2 728 km²
Wildobservation + sensor
Human sightings and records, or camera-trap / sensor detections — someone (or a device) saw or captured the species in the wild.
Coordinate accuracy85% within 1 km
≤100 m 138≤1 km 9≤10 km 10>10 km 15
172 georeferenced · 65 without coordinates
Open the mapobservation + sensor237
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 accuracy64% within 1 km
≤100 m 170≤1 km 42≤10 km 97>10 km 21
330 georeferenced · 440 without coordinates
Open the institutions mapphysical evidence770
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 institutions47 of 65 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
70
University of Stellenboschlocation not on record
65
Albuquerque, US
65
Durango, MX
64
ASUlocation not on record
45
Flagstaff, US
41
Austin, US
40
Saint Louis, US
33
EL PASO, US
22
Mexico City, MX
19
Torreón, MX
19
Riverside, US
19
Guasave, MX
18
Lubbock, US
17
Mexico City, MX
17
Claremont, US
17
San Isidro, AR
11
San Diego, US
11
DOI/NPS, Colonial National Historical Parklocation not on record
10
Wuzhou, CN
9
Phoenix, US
9
Comisión Técnico Consultiva de Coeficientes de Agostaderolocation not on record
8
Pullman, US
8
Kew, GB
8
Montecillo, Texcoco, MX
7
Tampa, US
7
Logan, US
7
Fort Worth, US
6
BClocation not on record
6
Zacatecas, MX
6
San Luis Potosí, MX
5
Bloomington, US
5
San Angelo, US
4
Florida Museum of Natural History- Zoology, Paleontology & Paleobotanylocation not on record
4
DOI/NPS, Greenbelt Parklocation not on record
4
Chapingo, MX
3
Denver, US
3
Hermosillo, MX
3
Arcata, US
3
Santa Barbara, US
3
Provo, US
3
Córdoba, AR
3
Brasília, BR
3
Cenargenlocation not on record
3
Mexico City, MX
3
San Luis Obispo, US
3
Davis, US
2
New Mexico State Universitylocation not on record
2
Centro de Investigación Regional Norte Centro, Campo Experimental La Campana, Instituto Nacional de Investigaciones Forestales, Agrícolas y Pecuariaslocation not on record
2
Giardini Botanici Hanburylocation not on record
2
Auckland, NZ
2
Musee des Dinosaures d'Esperaza (Aude)location not on record
2
USFSlocation not on record
2
The University of Arizonalocation not on record
1
Los Angeles, US
1
Instituto de Ecología Aplicada, Universidad Autónoma de Tamaulipaslocation not on record
1
Eastern Nevada Landscape Coalitionlocation not on record
1
Dresden, DE
1
Chongqing Museumlocation not on record
1
Boise, US
1
BAYLUlocation not on record
1
Moscow, US
1
US
1
Henderson, US
1
Madison, US
1
65 institutions · 765 of 770 vouchered records shown · 3 without an institution code
09Environmental DNA5 detections
Where the DNA of Scleropogon brevifolius 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
Countries1
Signal confidence: weakweighed across independent studies, places & mapped detections
Where its DNA was found
0 of 5 detections have coordinates
Open the map1 country0
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 median15.9 °C 15.9–15.9
Seasonal swing summer↔winter15.7 °C
Max temp (day)21.8 °C
Min temp (night)11.5 °C
Precipitation66.4 mm/mo
Air humidity54.7 %
Moisture balance-49.9 mm/mo
Vapour deficit875 Pa
Wind speed3.80 m/s
Cloud cover27.2 %
CHELSA 1981–2010, ~9 km grid, at location & month of 2 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.
WikipediaWikimedia Foundation2 languages↗
BioWikiNetmultilingual Wikipediamultilingual↗
GBIFGlobal Biodiversity Information Facility1 009 records↗
ENAEuropean Nucleotide Archive · EMBL-EBI5 eDNA detections↗
BOLD SystemsCentre for Biodiversity Genomics5 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↗