Lepidium fremontii, the desert pepperweed, is a species of flowering plant in the mustard family which is native to the southwestern United States, where it grows on sandy desert flats and the rocky slopes of nearby hills and mountains. It takes its scientific name from John C. Frémont.
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 Lepidium fremontii has left across the world's sequence archives.
At a glance
DNA specimens3
Marker genes3
GenBank sequences3
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.
★rbcLa★ITS3★ITS2
plant barcodefungal barcode
06Genome at a glanceCCDB
The complete instruction manualLepidium fremontii 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 accuracy89% within 1 km
≤100 m 770≤1 km 110≤10 km 59>10 km 49
988 georeferenced · 328 without coordinates
Open the mapobservation + sensor1 316
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 accuracy48% within 1 km
≤100 m 29≤1 km 221≤10 km 240>10 km 27
517 georeferenced · 682 without coordinates
Open the institutions mapphysical evidence1 199
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 institutions46 of 66 geolocated
Institutions and collections holding physical, vouchered specimens of this species — click a row to fly to it on the map.
Institution
Specimens
Claremont, US
287
Riverside, US
143
Bronx, US
78
San Diego, US
55
Flagstaff, US
47
CASlocation not on record
47
Phoenix, US
41
Santa Barbara, US
38
Davis, US
31
Los Angeles, US
27
US
26
Henderson, US
21
San Luis Obispo, US
21
DOI/NPS, Little Rock Central High School National Historic Sitelocation not on record
20
ASUlocation not on record
18
Logan, US
17
University of Stellenboschlocation not on record
15
Arcata, US
14
Canadian Department of Agriculturelocation not on record
13
Eastern Nevada Landscape Coalitionlocation not on record
11
San Francisco, US
10
Fullerton, US
10
EL PASO, US
9
Boise, US
8
Northridge, US
8
Provo, US
7
Irvine, US
7
Fredericton Stock Culture Collectionlocation not on record
6
Severin-McDaniel Insect Collectionlocation not on record
6
Wuzhou, CN
6
Pocatello, US
6
Long Beach, US
5
Tampa, US
5
Orem, US
5
Caldwell, US
5
INFlocation not on record
5
DOI/NPS, Colonial National Historical Parklocation not on record
4
Zürich, CH
4
Bureau of Land Managementlocation not on record
4
San Jose, US
4
San Bernardino, US
4
Moscow, US
4
Angwin, US
4
Uniwersytet Jagiellońskilocation not on record
3
Musee des Dinosaures d'Esperaza (Aude)location not on record
3
Bloomington, US
3
US
2
Saint Louis, US
2
Chongqing Museumlocation not on record
2
Pullman, US
2
New Haven, US
1
WTUlocation not on record
1
Turlock, US
1
Kew, GB
1
Arizona Western Collegelocation not on record
1
Florida Museum of Natural History- Zoology, Paleontology & Paleobotanylocation not on record
1
Columbia, US
1
Valdosta State Universitylocation not on record
1
DOI/NPS, Greenbelt Parklocation not on record
1
Chadron, US
1
San Angelo, US
1
West Virginia Wesleyan Collegelocation not on record
1
Durango, US
1
Tacoma, US
1
Lubbock, US
1
Bangkok, TH
1
66 institutions · 1 139 of 1 199 vouchered records shown · 59 without an institution code
09Environmental DNA2 detections
Where the DNA of Lepidium fremontii 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
Countries1
Signal confidence: weakweighed across independent studies, places & mapped detections
Where its DNA was found
0 of 2 detections have coordinates
Open the map1 country0
Bebbia juncea, Atriplex hymenelytra, Eschsch…
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 median16.7 °C 13.3–20.1
Seasonal swing summer↔winter23.1 °C
Max temp (day)23.5 °C 19.4–27.6
Min temp (night)11.0 °C 8.80–13.2
Precipitation43.3 mm/mo 14.3–72.4
Air humidity50.8 % 45.6–56.0
Moisture balance-101 mm/mo -151–-50.9
Vapour deficit1,062 Pa 799–1,325
Wind speed4.80 m/s 3.90–5.60
Cloud cover33.6 % 31.1–36.1
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 Facility2 920 records↗
ENAEuropean Nucleotide Archive · EMBL-EBI2 eDNA detections↗
BOLD SystemsCentre for Biodiversity Genomics3 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↗