Aristida purpurea
Nutt. · speciesAt a glance
Sources13 archives
Databases and archives Aristida purpurea's data was compiled from.
WikipediaWikimedia Foundation2 languages↗
BioWikiNetmultilingual Wikipediamultilingual↗
GBIFGlobal Biodiversity Information Facility4 952 records↗
ENAEuropean Nucleotide Archive · EMBL-EBI15 eDNA detections↗
BOLD SystemsCentre for Biodiversity Genomics39 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.
Spikelets showing the characteristic three awns apiece Aristida purpurea is a species of grass native to North America which is known by the common name purple three-awn.
No narrative description available for this taxon yet.
Size & morphology4
Life cycle & reproduction4
Diet & foraging1
Habitat & environment7
Physiology & chemistry8
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 Aristida purpurea 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 Aristida purpurea 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 222×GoaT · Kew Plant DNA C-values Database · CCDB · book-ipcn67-71
2n 442×CCDB · book-ipcn66 · CCDB · book-ipcn67-71
n 113×CCDB · book-ipcn73-74 · CCDB · Cave1958
diploid1×GoaT · Kew Plant DNA C-values Database
polyploid 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 type4 952 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 institutions83 of 122 geolocated
Institutions and collections holding physical, vouchered specimens of this species — click a row to fly to it on the map.
| Institution | Specimens |
|---|---|
| Austin, US | 345 |
| Bronx, US | 196 |
| DOI/NPS, Colonial National Historical Parklocation not on record | 162 |
| Fort Worth, US | 146 |
| ASUlocation not on record | 139 |
| Denver, US | 109 |
| EL PASO, US | 102 |
| University of Stellenboschlocation not on record | 88 |
| Albuquerque, US | 87 |
| Riverside, US | 85 |
| Flagstaff, US | 65 |
| Claremont, US | 64 |
| Phoenix, US | 59 |
| San Angelo, US | 56 |
| Spearfish, US | 52 |
| Tempe, US | 42 |
| Logan, US | 41 |
| Durango, MX | 41 |
| Provo, US | 38 |
| Lubbock, US | 34 |
| Missoula, US | 31 |
| BAYLUlocation not on record | 26 |
| Lincoln, US | 26 |
| Texas Lutheran Universitylocation not on record | 20 |
| Musee des Dinosaures d'Esperaza (Aude)location not on record | 19 |
| Saint Louis, US | 17 |
| Bangkok, TH | 17 |
| Moscow, US | 17 |
| International Salmonella Centre (W.H.O.)location not on record | 15 |
| Eastern Nevada Landscape Coalitionlocation not on record | 14 |
| Tampa, US | 14 |
| Orem, US | 12 |
| Bureau of Land Management, Caliente Field Officelocation not on record | 11 |
| US | 10 |
| San Diego, US | 10 |
| Durango, US | 9 |
| Guasave, MX | 9 |
| Grand Junction, US | 9 |
| San Luis Obispo, US | 9 |
| US | 9 |
| Davis, US | 9 |
| Kew, GB | 8 |
| Boise, US | 8 |
| Mexico City, MX | 7 |
| Santa Barbara, US | 6 |
| DOI/NPS, Greenbelt Parklocation not on record | 6 |
| Corvallis, US | 5 |
| Weber State Universitylocation not on record | 5 |
| Pocatello, US | 5 |
| USFSlocation not on record | 5 |
| Bureau of Land Managementlocation not on record | 5 |
| Bloomington, US | 5 |
| Los Angeles, US | 5 |
| Henderson, US | 5 |
| Wuzhou, CN | 4 |
| Chapingo, MX | 4 |
| Canadian Department of Agriculturelocation not on record | 4 |
| DOI/NPS, Little Rock Central High School National Historic Sitelocation not on record | 4 |
| BClocation not on record | 4 |
| Florida Museum of Natural History- Zoology, Paleontology & Paleobotanylocation not on record | 4 |
| Stephenville, US | 4 |
| Adam Mickiewicz University in Poznańlocation not on record | 3 |
| Turku, FI | 3 |
| Juriquilla, MX | 3 |
| Vancouver, CA | 3 |
| Bandelier National Monumentlocation not on record | 3 |
| Auckland, NZ | 3 |
| CASlocation not on record | 3 |
| Pullman, US | 3 |
| Irvine, US | 3 |
| Canadian Museum of Nature, National Herbarium of Canadalocation not on record | 2 |
| Arcata, US | 2 |
| Angwin, US | 2 |
| Brasília, BR | 2 |
| WTUlocation not on record | 2 |
| Pretoria, ZA | 2 |
| Cenargenlocation not on record | 2 |
| Chongqing Museumlocation not on record | 2 |
| Honolulu, US | 2 |
| Comisión Técnico Consultiva de Coeficientes de Agostaderolocation not on record | 2 |
| Denton, US | 2 |
| Giardini Botanici Hanburylocation not on record | 2 |
| Fullerton, US | 2 |
| Chadron, US | 2 |
| The University of Arizonalocation not on record | 2 |
| Philadelphia, US | 1 |
| Pittsburg, US | 1 |
| Clemson, US | 1 |
| Victoria, CA | 1 |
| Linares, MX | 1 |
| Austin, US | 1 |
| Jurica-Suchy Nature Museumlocation not on record | 1 |
| Long Beach, US | 1 |
| BRNUlocation not on record | 1 |
| La Paz, MX | 1 |
| US | 1 |
| Dresden, DE | 1 |
| Davenport, US | 1 |
| Columbia, US | 1 |
| Hermosillo, MX | 1 |
| Ann Arbor, US | 1 |
| Museo civico La Terra e l'Uomo di Crocetta del Montellolocation not on record | 1 |
| Jena Microbial Resource Collectionlocation not on record | 1 |
| Portland, US | 1 |
| DOI/NPS, Craters of the Moon National Monument & Preservelocation not on record | 1 |
| Wlocation not on record | 1 |
| Portland, US | 1 |
| Brookings, US | 1 |
| Jackson, US | 1 |
| Stockholm, SE | 1 |
| MAlocation not on record | 1 |
| Istituto Agrario Castelnuovolocation not on record | 1 |
| Cheney, US | 1 |
| Caldwell, US | 1 |
| Madison, US | 1 |
| Wellington, NZ | 1 |
| University of Alberta Museumslocation not on record | 1 |
| Rocky Mountain Biological Laboratorylocation not on record | 1 |
| Severin-McDaniel Insect Collectionlocation not on record | 1 |
| University of Southern Mississippilocation not on record | 1 |
| Ciudad Juárez, MX | 1 |
| Zacatecas, MX | 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 Aristida purpurea 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.