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NarrativeWikipediaarticle
Traits & measurements3 literature sources9 traits
Occurrence & distributionGBIF1 279 records
Genome at a glanceCCDB2n = 144
01Narrative
Asplenium pinnatifidum, commonly known as the lobed spleenwort or pinnatifid spleenwort, is a small fern found principally in the Appalachian Mountains and the Shawnee Hills, growing in rock crevices in moderately acid to subacid strata. Originally identified as a variety of walking fern (Asplenium rhizophyllum), it was classified as a separate species by Thomas Nuttall in 1818. It is believed to have originated by chromosome doubling in a hybrid between walking fern and mountain spleenwort (Asplenium montanum), producing a fertile tetraploid, a phenomenon known as alloploidy; however, the hypothesized parental hybrid has never been located. It is intermediate in morphology between the parent species: while its leaf blades are long and tapering like that of walking fern, the influence of mountain spleenwort means that the blades are lobed, rather than whole. A. pinnatifidum can itself form sterile hybrids with several other spleenworts.
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 Asplenium pinnatifidum has left across the world's sequence archives.
At a glance
06Genome at a glanceCCDB
The complete instruction manualAsplenium pinnatifidum 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.
Chromosome-count records — grouped by value · 2n = full set, n = gamete · click a value for sources & references
2n 1442×CCDB · book-LoveLove1977 · CCDB · eflora
CCDB · book-LoveLove1977 — Wagner 1963b
CCDB · eflora
08Occurrence & distribution
Record type1 279 records
Wild obs. + sensor806
Museum / vouchered473
Range
Area of Occupancy AOO3 224 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 accuracy31% within 1 km
≤100 m 164≤1 km 46≤10 km 26>10 km 450
686 georeferenced · 120 without coordinates
Open the mapobservation + sensor806
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 accuracy47% within 1 km
≤100 m 21≤1 km 130≤10 km 132>10 km 38
321 georeferenced · 152 without coordinates
Open the institutions mapphysical evidence473
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 institutions42 of 50 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
123
Chongqing Museumlocation not on record
42
Bronx, US
29
Millersville, US
26
St. Paul, US
25
Chapel Hill, US
25
Chicago, US
24
Bloomington, US
22
Tuscaloosa, US
15
Philadelphia, US
12
Saint Louis, US
11
Morgantown, US
10
University of Stellenboschlocation not on record
8
Williamsburg, US
8
Auckland, NZ
6
Knoxville, US
5
McWane Science Centerlocation not on record
5
Durham, US
5
Bangkok, TH
5
Staten Island, US
5
Fort Worth, US
5
GAlocation not on record
4
WTUlocation not on record
3
Minia, EG
3
Wuzhou, CN
3
James F. Matthews Center for Biodiversity Studieslocation not on record
2
Mississippi State, US
2
New Haven, US
2
EL PASO, US
1
Xiamen, CN
1
Dekalb, US
1
Flagstaff, US
1
Norfolk, US
1
Allentown, US
1
Tampa, US
1
Little Rock, US
1
San Luis Obispo, US
1
Davenport, US
1
Pullman, US
1
Fairfax, US
1
Wellington, NZ
1
Beijing, CN
1
Zürich, CH
1
Conway, US
1
US
1
LDlocation not on record
1
San Jose, US
1
Fayetteville, US
1
Madison, US
1
BAYLUlocation not on record
1
50 institutions · 457 of 473 vouchered records shown · 16 without an institution code
