Asclepias quadrifolia is a species of milkweed commonly called fourleaf milkweed or whorled milkweed. The plant occurs in the eastern United States and Canada.
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 quadrifolia has left across the world's sequence archives.
At a glance
DNA specimens9
Marker genes6
GenBank sequences9
eDNA detections4
Countries2
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.
★matK2★rbcL5★rbcLa★ITS2★ITS2trnH-psbA
plant barcodefungal barcodemarker
08Occurrence & distribution
Record type4 750 records
Wild obs. + sensor3 480
Museum / vouchered1 270
Origin
Native8
Range
Area of Occupancy AOO12 436 km²
Wildobservation + sensor
Human sightings and records, or camera-trap / sensor detections — someone (or a device) saw or captured the species in the wild.
Coordinate accuracy74% within 1 km
≤100 m 1 661≤1 km 398≤10 km 213>10 km 521
2 793 georeferenced · 687 without coordinates
Open the mapobservation + sensor3 480
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 accuracy27% within 1 km
≤100 m 41≤1 km 191≤10 km 545>10 km 86
863 georeferenced · 407 without coordinates
Open the institutions mapphysical evidence1 270
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 institutions62 of 91 geolocated
Institutions and collections holding physical, vouchered specimens of this species — click a row to fly to it on the map.
Institution
Specimens
Philadelphia, US
243
Chongqing Museumlocation not on record
134
Chicago, US
116
Saint Louis, US
104
Bronx, US
56
New Haven, US
49
Bloomington, US
39
Burlington, US
38
Wuzhou, CN
36
Allentown, US
27
Bangkok, TH
19
University of Stellenboschlocation not on record
19
Fort Worth, US
19
Williamsburg, US
18
College Park, US
16
St. Paul, US
15
Chapel Hill, US
15
Knoxville, US
13
Western Carolina Universitylocation not on record
12
Millersville, US
11
Johnson City, US
9
Staten Island, US
8
GB
8
Austin, US
8
Fayetteville, US
8
University of New Hampshirelocation not on record
8
Tuscaloosa, US
7
Cincinnati, US
6
Morgantown, US
6
Dover, US
6
Tampa, US
6
San Angelo, US
6
Davenport, US
5
Clemson, US
5
Kirksville, US
5
Philadelphia, US
4
Madison, US
4
Emporia, US
4
Mississippi State, US
4
Appalachian State Universitylocation not on record
4
Museo civico La Terra e l'Uomo di Crocetta del Montellolocation not on record
3
Maryland Department of Natural Resourceslocation not on record
3
Keene State Universitylocation not on record
3
Columbia, US
3
Asheville, US
3
Springfield, US
3
AUAlocation not on record
3
Richmond, US
3
Fairfax, US
3
Little Rock, US
3
University of Tennessee at Chattanoogalocation not on record
3
Henderson State Universitylocation not on record
2
Dekalb, US
2
Tennessee Technological Universitylocation not on record
2
Denver, US
2
GAlocation not on record
2
Harrisonburg, US
2
Phoenix, US
2
Ann Arbor, US
2
Jefferson City, US
2
Conway, US
2
Pittsburg, US
2
DOI/NPS, Greenbelt Parklocation not on record
2
University of Guelph, OAC Herbariumlocation not on record
2
China Agricultural Universitylocation not on record
2
DOI/NPS, Selma to Montgomery National Historic Traillocation not on record
2
Macomb, US
2
Smithsonian Institutionlocation not on record
2
Miami, US
2
Oklahoma State Universitylocation not on record
1
Centre National d'Application des Recherches Pharmaceutiques (CNARP)location not on record
1
MILlocation not on record
1
Elikins, US
1
Lord Fairfax Community Collegelocation not on record
1
Mohonk Preservelocation not on record
1
DOI/NPS, Mississippi National River & Recreation Arealocation not on record
1
Edmonton, CA
1
Flagstaff, US
1
James F. Matthews Center for Biodiversity Studieslocation not on record
1
Northridge, US
1
LINUlocation not on record
1
Logan, US
1
Paris, FR
1
Provo, US
1
Jena Microbial Resource Collectionlocation not on record
1
Florida Museum of Natural History- Zoology, Paleontology & Paleobotanylocation not on record
1
Hudson, US
1
EL PASO, US
1
Vancouver, CA
1
Chicago, US
1
DOI/NPS, Colonial National Historical Parklocation not on record
1
91 institutions · 1 211 of 1 270 vouchered records shown · 59 without an institution code
09Environmental DNA4 detections
Where the DNA of Asclepias quadrifolia 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 found4
Studies independent surveys1
Countries2
Signal confidence: weakweighed across independent studies, places & mapped detections
Where its DNA was found
0 of 4 detections have coordinates
Open the map2 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.
Modelled climatemodelled
−15°Ctemperature across detection sites+40°C
Temperature median12.3 °C 11.7–13.0
Seasonal swing summer↔winter24.8 °C
Max temp (day)17.8 °C 16.9–18.7
Min temp (night)7.40 °C 6.80–8.00
Precipitation87.6 mm/mo 84.2–91.1
Air humidity55.5 % 55.4–55.7
Moisture balance-18.7 mm/mo -42.9–5.40
Vapour deficit676 Pa 669–683
Wind speed3.70 m/s 3.10–4.30
Cloud cover44.3 % 43.9–44.7
CHELSA 1981–2010, ~9 km grid, at location & month of 4 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 Facility4 750 records↗
ENAEuropean Nucleotide Archive · EMBL-EBI4 eDNA detections↗
BOLD SystemsCentre for Biodiversity Genomics9 specimens↗
NCBIUS National Library of Medicinesequences↗
GRIN TaxonomyUSDA-ARSdistribution & uses↗
Open Tree of LifeOpenTreephylogeny backbone↗
GLoBIGlobal Biotic Interactionsbiotic interactions↗