Sporobolus contractus is a species of grass known by the common name spike dropseed. It is native to western North America, including the southwestern United States and northern Mexico. It grows in desert and plateau habitat, in woodlands, scrub, and dry, sandy, open areas.
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 Sporobolus contractus has left across the world's sequence archives.
At a glance
DNA specimens2
Marker genes2
GenBank sequences2
eDNA detections2
Countries1
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.
★matK1★ITS1
plant barcodefungal barcode
06Genome at a glanceCCDB
The complete instruction manualSporobolus contractus 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 = 36 n = 18
Ploidypolyploid inferred
Chromosome-count records — grouped by value · 2n = full set, n = gamete · click a value for sources & references
n 182×CCDB · ipcn-api-dl · CCDB · book-ipcn75-78
CCDB · ipcn-api-dl — Ward, D. E. & R. Spellenberg. 1988. Chromosome counts of angiosperms from New Mexico and adjacent areas. Phytologia 64: 390–398.
CCDB · book-ipcn75-78 — Reeder 1977
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 accuracy92% within 1 km
≤100 m 62≤1 km 3≤10 km 1>10 km 5
71 georeferenced · 72 without coordinates
Open the mapobservation + sensor143
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 accuracy56% within 1 km
≤100 m 102≤1 km 95≤10 km 122>10 km 32
351 georeferenced · 562 without coordinates
Open the institutions mapphysical evidence913
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 institutions50 of 70 geolocated
Institutions and collections holding physical, vouchered specimens of this species — click a row to fly to it on the map.
Institution
Specimens
Albuquerque, US
126
Flagstaff, US
96
ASUlocation not on record
88
Bronx, US
73
Riverside, US
54
Claremont, US
53
Phoenix, US
41
San Diego, US
39
EL PASO, US
32
University of Stellenboschlocation not on record
31
Austin, US
23
Logan, US
20
Ciudad Juárez, MX
14
DOI/NPS, Colonial National Historical Parklocation not on record
13
Provo, US
12
Denver, US
10
Guasave, MX
9
Lubbock, US
8
Arcata, US
7
Bloomington, US
7
Durango, MX
6
Torreón, MX
6
Tampa, US
6
US
6
Moscow, US
6
Centro de Investigación Regional Norte Centro, Campo Experimental La Campana, Instituto Nacional de Investigaciones Forestales, Agrícolas y Pecuariaslocation not on record
5
The University of Arizonalocation not on record
5
Henderson, US
5
Austin, US
5
San Angelo, US
4
Durango, US
4
La Paz, MX
4
Eastern Nevada Landscape Coalitionlocation not on record
4
Mexico City, MX
4
Museo civico La Terra e l'Uomo di Crocetta del Montellolocation not on record
4
Bandelier National Monumentlocation not on record
4
DOI/NPS, Greenbelt Parklocation not on record
4
Fort Worth, US
4
Santa Barbara, US
4
USFSlocation not on record
3
Boise, US
3
Davis, US
3
Zacatecas, MX
3
Wuzhou, CN
3
CASlocation not on record
3
Saint Louis, US
3
BAYLUlocation not on record
3
Los Angeles, US
2
Canadian Department of Agriculturelocation not on record
2
Hermosillo, MX
2
Mérida, MX
2
Pittsburg, US
2
San Luis Obispo, US
2
China Agricultural Universitylocation not on record
2
Weber State Universitylocation not on record
2
Montecillo, Texcoco, MX
2
Kew, GB
2
Bureau of Land Management, Caliente Field Officelocation not on record
1
Florida Museum of Natural History- Zoology, Paleontology & Paleobotanylocation not on record
1
Chongqing Museumlocation not on record
1
Tempe, US
1
Grand Junction, US
1
Pullman, US
1
Angwin, US
1
Long Beach, US
1
USUUBlocation not on record
1
Chadron, US
1
University of Southern Mississippilocation not on record
1
Mexico City, MX
1
Burlington, US
1
70 institutions · 903 of 913 vouchered records shown · 10 without an institution code
09Environmental DNA2 detections
Where the DNA of Sporobolus contractus 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 found2
Studies independent surveys1
Signal confidence: weakweighed across independent studies, places & mapped detections
Where its DNA was found
0 of 2 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 Facility1 056 records↗
ENAEuropean Nucleotide Archive · EMBL-EBI2 eDNA detections↗
BOLD SystemsCentre for Biodiversity Genomics2 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↗