Hordeum pusillum
Nutt. · speciesAt a glance
Sources13 archives
Databases and archives Hordeum pusillum's data was compiled from.
WikipediaWikimedia Foundation4 languages↗
BioWikiNetmultilingual Wikipediamultilingual↗
GBIFGlobal Biodiversity Information Facility5 774 records↗
ENAEuropean Nucleotide Archive · EMBL-EBI49 eDNA detections↗
BOLD SystemsCentre for Biodiversity Genomics51 specimens↗
NCBIUS National Library of Medicinesequences↗
GRIN TaxonomyUSDA-ARSdistribution & uses↗
Open Tree of LifeOpenTreephylogeny backbone↗
CCDBChromosome Counts DB · Tel Aviv U.genome & karyotype↗
GoaTGenomes on a Tree · Sangergenome & karyotype↗
PloiDBPloidy Databasegenome & karyotype
WikidataWikimedia Foundationstructured facts↗
GLoBIGlobal Biotic Interactionsbiotic interactions↗Every layer below draws on the sources above — open one to explore it, or use ← → to move between tabs.
Hordeum intercedens is an diploid, annual species of wild barley known by the common names bobtail barley and vernal barley. It is native to southern California and northern Baja California, where it is an increasingly rare member of the flora in saline and alkaline soils near seasonal waterflows and vernal pool habitats. Today most occurrences are located on the Channel Islands of California; many of the occurrences known from the mainland have been extirpated in the process of land development.California Native Plant Society Rare Plant Profile This is an annual grass growing erect to bent in small tufts with stems up to 40 centimeters long. The inflorescence is a green spike up to 6.5 centimeters long made up of awned spikelets between 1 and 2 centimeters long. Hordeum intercedens originated via long-distance dispersal of a southern South American Hordeum species to North America less than 1 million years ago. Its closest relatives are therefore not the other North American taxa like meadow barley or foxtail barley but the annual Hordeum euclaston occurring in Central and western Argentina and Uruguay. It is also only distantly related to the crop barley, from which the lineage leading to H. intercedens diverged about 12 million years ago. H. intercedens is one of the parental species of Hordeum depressum.
No narrative description available for this taxon yet.
Size & morphology7
Life cycle & reproduction24
Diet & foraging1
Habitat & environment29
Physiology & chemistry24
Uses & economy15
Other traits4
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 Hordeum pusillum 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 Hordeum pusillum 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.
Genome sizehow big the whole instruction manual is
Measured in base pairs (bp) — the individual letters of DNA (human ≈ 3.2 Gb, a bacterium a few million). The chart places this genome on a logarithmic scale — each step to the right is ten times bigger — among reference organisms. Across species a bigger genome loosely tracks with larger cells, slower growth and lower-energy lifestyles (powered flight favours small genomes) — yet it does not imply more genes or a more advanced organism (the long-standing C-value paradox).
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 1417×GoaT · Kew Plant DNA C-values Database · CCDB · nw-europe-fl · CCDB · ipcn-api-dl +6
2n 281×CCDB · book-atlas-flowering-plants
diploid1×GoaT · Kew Plant DNA C-values Database
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 type5 774 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.
Cultivated / Captivenot free-living
A living individual in a botanical garden, zoo or nursery — cultivated or kept, not free-living.
Wildobservation + sensor
Human sightings and records, or camera-trap / sensor detections — someone (or a device) saw or captured the species in the wild.
Holding institutions101 of 152 geolocated
Institutions and collections holding physical, vouchered specimens of this species — click a row to fly to it on the map.
| Institution | Specimens |
|---|---|
| Wuzhou, CN | 365 |
| Fort Worth, US | 137 |
| Musee des Dinosaures d'Esperaza (Aude)location not on record | 130 |
| Bronx, US | 102 |
| International Salmonella Centre (W.H.O.)location not on record | 90 |
| Austin, US | 84 |
| Saint Louis, US | 81 |
| ASUlocation not on record | 76 |
| DOI/NPS, Greenbelt Parklocation not on record | 60 |
| Denver, US | 60 |
| Bloomington, US | 52 |
| Flagstaff, US | 49 |
| Williamsburg, US | 39 |
| Albuquerque, US | 39 |
| Phoenix, US | 38 |
| BAYLUlocation not on record | 38 |
| Bangkok, TH | 35 |
| Pittsburg, US | 33 |
| Logan, US | 31 |
| EL PASO, US | 30 |
| St. Paul, US | 30 |
| Jackson, US | 29 |
| Lubbock, US | 27 |
| Chongqing Museumlocation not on record | 27 |
| Chadron, US | 27 |
| Jena Microbial Resource Collectionlocation not on record | 23 |
| San Diego, US | 22 |
| Tuscaloosa, US | 21 |
| University of Stellenboschlocation not on record | 20 |
| US | 20 |
| Tampa, US | 17 |
| Bozeman, US | 16 |
| Mississippi State, US | 16 |
| Fayetteville, US | 16 |
| College Park, US | 15 |
| Texas Lutheran Universitylocation not on record | 15 |
| Riverside, US | 13 |
| Chapel Hill, US | 12 |
| SWE054location not on record | 12 |
| Valdosta State Universitylocation not on record | 12 |
| Burlington, US | 11 |
| San Angelo, US | 11 |
| Helsinki, FI | 11 |
| Missoula, US | 10 |
| Davenport, US | 10 |
| Columbia, US | 10 |
| Lincoln, US | 8 |
| GB | 8 |
| Ann Arbor, US | 8 |
| Little Rock, US | 8 |
| Knoxville, US | 8 |
| Denton, US | 7 |
| GAlocation not on record | 7 |
| Edmonton, CA | 7 |
| Clemson, US | 7 |
| South Kensington, GB | 7 |
| DOI/NPS, Mississippi National River & Recreation Arealocation not on record | 7 |
| Norfolk, US | 7 |
| AUAlocation not on record | 6 |
| Moscow, US | 6 |
| University of Southern Mississippilocation not on record | 6 |
| Emporia, US | 5 |
| Canadian Department of Agriculturelocation not on record | 5 |
| Springfield, US | 5 |
| Hermosillo, MX | 5 |
| Auckland, NZ | 5 |
| Sichuan Agricultural Universitylocation not on record | 5 |
| Conway, US | 5 |
| Tall Timbers Research Stationlocation not on record | 4 |
| NSMKlocation not on record | 4 |
| Pullman, US | 4 |
| Durango, US | 4 |
| University of Tennessee at Chattanoogalocation not on record | 4 |
| Stephenville, US | 4 |
| Florida Museum of Natural History- Zoology, Paleontology & Paleobotanylocation not on record | 4 |
| Miami, US | 3 |
| Conway, US | 3 |
| Boise, US | 3 |
| Spearfish, US | 3 |
| LDlocation not on record | 3 |
| Appalachian State Universitylocation not on record | 3 |
| Dekalb, US | 3 |
| USFSlocation not on record | 3 |
| Uppsala, SE | 3 |
| Fargo, US | 3 |
| Kirksville, US | 3 |
| Madison, US | 3 |
| Tempe, US | 3 |
| Davis, US | 3 |
| Claremont, US | 3 |
| Odawara, JP | 3 |
| Fredericton Stock Culture Collectionlocation not on record | 3 |
| Northridge, US | 2 |
| Bern, CH | 2 |
| US | 2 |
| San Luis Obispo, US | 2 |
| Mexico City, MX | 2 |
| Santa Barbara, US | 2 |
| Russellville, US | 2 |
| Orem, US | 2 |
| Torreón, MX | 2 |
| Córdoba, AR | 2 |
| IDElocation not on record | 2 |
| Victoria, CA | 2 |
| Zapopan, MX | 2 |
| Macomb, US | 2 |
| McWane Science Centerlocation not on record | 2 |
| Provo, US | 2 |
| Meguro Parasitological Museumlocation not on record | 1 |
| DOI/NPS, Colonial National Historical Parklocation not on record | 1 |
| Centro de Investigación Regional Norte Centro, Campo Experimental La Campana, Instituto Nacional de Investigaciones Forestales, Agrícolas y Pecuariaslocation not on record | 1 |
| Fairfax, US | 1 |
| China Agricultural Universitylocation not on record | 1 |
| DOI/NPS, Little Rock Central High School National Historic Sitelocation not on record | 1 |
| Museum of the Rockieslocation not on record | 1 |
| Johnson City, US | 1 |
| Henderson State Universitylocation not on record | 1 |
| The University of Arizonalocation not on record | 1 |
| Waverly, US | 1 |
| San Jose State University, Museum of Birds and Mammalslocation not on record | 1 |
| Morgantown, US | 1 |
| US | 1 |
| Weber State Universitylocation not on record | 1 |
| Fredericksburg, US | 1 |
| US | 1 |
| Taipei, TW | 1 |
| San Diego Natural History Museum, Herbariumlocation not on record | 1 |
| UMKClocation not on record | 1 |
| University of Winnipeglocation not on record | 1 |
| University of North Carolina at Pembrokelocation not on record | 1 |
| San Isidro, AR | 1 |
| San Diego Natural History Museumlocation not on record | 1 |
| Brookings, US | 1 |
| Weymouth Woods Sandhills Nature Preservelocation not on record | 1 |
| Mexico City, MX | 1 |
| Chicago, US | 1 |
| Guasave, MX | 1 |
| Jefferson City, US | 1 |
| Toronto, CA | 1 |
| Eastern Nevada Landscape Coalitionlocation not on record | 1 |
| Austin, US | 1 |
| Audubon Society -- Silver Bluff Audubon Center and Sanctuarylocation not on record | 1 |
| SEINetlocation not on record | 1 |
| North Carolina Museum of Natural Scienceslocation not on record | 1 |
| Tomioka, JP | 1 |
| James F. Matthews Center for Biodiversity Studieslocation not on record | 1 |
| Tennessee Technological Universitylocation not on record | 1 |
| Western Carolina Universitylocation not on record | 1 |
| Due West, US | 1 |
| University of Alberta Museumslocation not on record | 1 |
| Staten Island, US | 1 |
| Grand Junction, US | 1 |
Cultivated / Captivenot free-living
A living individual in a botanical garden, zoo or nursery — cultivated or kept, not free-living.
Where the DNA of Hordeum pusillum 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.