Athyrium angustum is known as the northern lady fern, native to northeastern North America. It was long included in the superspecies Athyrium filix-femina, but is now largely recognized as a distinct species. Athyrium angustum has a more southern counterpart, Athyrium asplenioides which can be difficult to distinguish between the two. This species, the southern lady fern, has a broader frond, especially at the base.
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 Athyrium angustum has left across the world's sequence archives.
At a glance
eDNA detections1
Countries1
08Occurrence & distribution
Record type16 823 records
Wild obs. + sensor16 037
Museum / vouchered786
Range
Area of Occupancy AOO41 312 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 accuracy87% within 1 km
≤100 m 9 656≤1 km 1 780≤10 km 708>10 km 1 039
13 183 georeferenced · 2 854 without coordinates
Open the mapobservation + sensor16 037
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 accuracy21% within 1 km
≤100 m 4≤1 km 89≤10 km 323>10 km 34
450 georeferenced · 336 without coordinates
Open the institutions mapphysical evidence786
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 institutions35 of 47 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
259
Ann Arbor, US
188
Minia, EG
66
St. Paul, US
58
Durham, US
31
Québec, CA
25
Bronx, US
17
Keene State Universitylocation not on record
15
Chapel Hill, US
12
Davenport, US
10
Morgantown, US
10
US
8
Tampa, US
7
Kingston, US
6
Lord Fairfax Community Collegelocation not on record
6
Paris, FR
5
New Haven, US
5
Wellington, NZ
4
WTUlocation not on record
4
Saint Louis, US
3
Montréal, CA
3
Oswego, US
3
Western Carolina Universitylocation not on record
3
US
3
Zürich, CH
3
Bangkok, TH
3
Burlington, US
2
University of Wisconsinlocation not on record
2
Fort Worth, US
2
Toronto, CA
1
Chicago, US
1
Bozeman, US
1
DULlocation not on record
1
BAYLUlocation not on record
1
San Jose State University, Museum of Birds and Mammalslocation not on record
1
Moscow, US
1
GB
1
Madison, US
1
Appalachian State Universitylocation not on record
1
Bloomington, US
1
McWane Science Centerlocation not on record
1
Chicago, US
1
Pittsburg, US
1
College Park, US
1
Ypsilanti, US
1
Chongqing Museumlocation not on record
1
Museo civico La Terra e l'Uomo di Crocetta del Montellolocation not on record
1
47 institutions · 781 of 786 vouchered records shown · 5 without an institution code
09Environmental DNA1 detections
Where the DNA of Athyrium angustum 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
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 median20.2 °C 20.2–20.2
Seasonal swing summer↔winter30.9 °C
Max temp (day)24.2 °C
Min temp (night)16.9 °C
Precipitation99.4 mm/mo
Air humidity58.8 %
Moisture balance-24.8 mm/mo
Vapour deficit971 Pa
Wind speed2.40 m/s
Cloud cover45.5 %
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.
