Asclepias erosa is a species of milkweed known commonly as desert milkweed. It is native to southern California, Arizona, and northern Baja California, where it is most abundant in the desert regions.
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 Asclepias erosa has left across the world's sequence archives.
At a glance
DNA specimens3
Marker genes3
eDNA detections1
Countries1
Marker genes sequenced
★ 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.
★matK★rbcLa★ITS2
plant barcodefungal barcode
06Genome at a glanceCCDB
The complete instruction manualAsclepias erosa 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 = 22 n = 11
Ploidydiploid inferred
Chromosome-count records — grouped by value · 2n = full set, n = gamete · click a value for sources & references
n 111×CCDB · book-ipcn67-71
CCDB · book-ipcn67-71 — NIEHAUS, T., & L. WONG, JR. 1971. In IOPB chromosome reports XXXII. Taxon 20: 3Q9-356.
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 accuracy87% within 1 km
≤100 m 854≤1 km 106≤10 km 56>10 km 87
1 103 georeferenced · 371 without coordinates
Open the mapobservation + sensor1 474
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 accuracy42% within 1 km
≤100 m 46≤1 km 58≤10 km 121>10 km 21
246 georeferenced · 284 without coordinates
Open the institutions mapphysical evidence530
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 institutions38 of 54 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
84
San Diego, US
62
Riverside, US
58
Phoenix, US
37
ASUlocation not on record
30
Philadelphia, US
26
Santa Barbara, US
24
Bronx, US
22
Henderson, US
15
Chicago, US
14
Logan, US
12
Pomona Collegelocation not on record
11
Flagstaff, US
11
US
7
Austin, US
6
Davis, US
5
CASlocation not on record
5
Provo, US
5
San Francisco, US
5
Eastern Nevada Landscape Coalitionlocation not on record
4
San Luis Obispo, US
4
Canadian Department of Agriculturelocation not on record
4
Saint Louis, US
4
La Paz, MX
3
Northridge, US
3
Mexico City, MX
3
Los Angeles, US
3
St. Paul, US
3
University of Stellenboschlocation not on record
3
Arizona Western Collegelocation not on record
2
Pullman, US
2
Angwin, US
2
San Jose, US
2
Bureau of Land Managementlocation not on record
2
Severin-McDaniel Insect Collectionlocation not on record
2
Irvine, US
1
DOI/NPS, Colonial National Historical Parklocation not on record
1
DOI/NPS, Greenbelt Parklocation not on record
1
Calabar, NG
1
Madison, US
1
San Diego Natural History Museum, Herbariumlocation not on record
1
The University of Arizonalocation not on record
1
Arizona State University Biocollectionslocation not on record
1
Durham, US
1
Ensenada, MX
1
Oklahoma State Universitylocation not on record
1
Pocatello, US
1
Long Beach, US
1
San Bernardino, US
1
Fredericton Stock Culture Collectionlocation not on record
1
Tampa, US
1
Fort Worth, US
1
Bangkok, TH
1
Hermosillo, MX
1
54 institutions · 504 of 530 vouchered records shown · 26 without an institution code
09Environmental DNA1 detections
Where the DNA of Asclepias erosa 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 found1
Studies independent surveys1
Countries1
Signal confidence: weakweighed across independent studies, places & mapped detections
Where its DNA was found
0 of 1 detections have coordinates
Open the map1 country0
non-native annual grassland with scattered P…
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 median24.4 °C 24.4–24.4
Seasonal swing summer↔winter16.8 °C
Max temp (day)32.2 °C
Min temp (night)17.6 °C
Precipitation10.4 mm/mo
Air humidity47.8 %
Moisture balance-159 mm/mo
Vapour deficit1,601 Pa
Wind speed3.40 m/s
Cloud cover13.4 %
CHELSA 1981–2010, ~9 km grid, at location & month of 1 detection point · 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 Foundation3 languages↗
BioWikiNetmultilingual Wikipediamultilingual↗
GBIFGlobal Biodiversity Information Facility2 010 records↗
ENAEuropean Nucleotide Archive · EMBL-EBI1 eDNA detections↗
BOLD SystemsCentre for Biodiversity Genomics3 specimens↗
GRIN TaxonomyUSDA-ARSdistribution & uses↗
Open Tree of LifeOpenTreephylogeny backbone↗
CCDBChromosome Counts DB · Tel Aviv U.genome & karyotype↗
PloiDBPloidy Databasegenome & karyotype
GLoBIGlobal Biotic Interactionsbiotic interactions↗