Every layer below draws on the sources above — open one to explore it, or use ← → to move between tabs.
NarrativeWikipediaarticle
Traits & measurements2 literature sources7 traits
Occurrence & distributionGBIF1 235 records
DNA & barcodingNCBIsequences
Genome at a glanceCCDB2n = 58
01Narrative
Pellaea bridgesii is a species of fern known by the common name Bridges' cliffbrake. It is native to an area of the western United States from northern California to Idaho, where it grows in rocky granitic cliffs and slopes. Pellaea bridgesii grows from a branching brown rhizome. Each leaf is up to 30 or 35 centimeters long. It is composed of a straight brown rachis lined with widely spaced leathery, blue-green leaflets which are round to oval and sometimes folded over. The edges of the leaflets are not rolled under and do not cover the sporangia on the undersides.
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 Pellaea bridgesii has left across the world's sequence archives.
At a glance
Marker genes1
GenBank sequences2
Countries1
The DNA barcodea real sequence read deposited for this species
Pellaea bridgesii voucher Dean 5218 (DAV) ribulose-1,5-bisphosphate carboxylase/oxygenase large subunit (rbcL) gene, partial cds; chloroplast
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.
★rbcL2
plant barcode
06Genome at a glanceCCDB
The complete instruction manualPellaea bridgesii 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 = 58 n = 29
Chromosome-count records — grouped by value · 2n = full set, n = gamete · click a value for sources & references
2n 581×CCDB · eflora
CCDB · eflora
07Deep time~14.4 Ma lineage
How far back this lineage goes — and how we know. Everything here is measured in Ma, short for “mega-annum”: millions of years ago. The chart reads left to right like a calendar of the Earth, from the deep past on the left to today at the right edgetop to bottom like a core drilled through the Earth, from the deep past at the top down to today at the bottom.
At a glance
DNA clock origin14.4 Ma TimeTree
When this lineage existed
How to read this: the coloured strip along the bottomdown the left is the geological calendar — the standard epochs (Pliocene, Pleistocene…) every museum uses, shown so you can see which chapter of Earth's history this lineage lived in. This lineage is a young one, so the strip is zoomed in to epochs — the finer subdivisions inside a period. The orange marker is the DNA clock: DNA accumulates mutations at a roughly steady rate, so comparing this species' DNA with its relatives estimates when the lineage split off — independently of any fossil.
DNA clock origin
08Occurrence & distribution
Record type1 235 records
Wild obs. + sensor910
Museum / vouchered325
Origin
Native25
Range
Area of Occupancy AOO2 320 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 accuracy90% within 1 km
≤100 m 506≤1 km 84≤10 km 44>10 km 25
659 georeferenced · 251 without coordinates
Open the mapobservation + sensor910
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 4≤1 km 97≤10 km 94>10 km 15
210 georeferenced · 115 without coordinates
Open the institutions mapphysical evidence325
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 50 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
29
WTUlocation not on record
27
Philadelphia, US
27
DOI/NPS, Little Rock Central High School National Historic Sitelocation not on record
17
CASlocation not on record
15
Chicago, US
13
San Diego, US
13
Bronx, US
12
Moscow, US
10
Fredericton Stock Culture Collectionlocation not on record
10
Davis, US
9
Santa Barbara, US
8
McWane Science Centerlocation not on record
5
St. Paul, US
5
Canadian Department of Agriculturelocation not on record
4
Riverside, US
4
Pullman, US
4
San Jose, US
4
Auckland, NZ
4
Flagstaff, US
4
San Luis Obispo, US
3
LDlocation not on record
3
Bloomington, US
3
Northridge, US
3
Tampa, US
2
Knoxville, US
2
Chongqing Museumlocation not on record
2
Boise, US
1
Long Beach, US
1
Chicago, US
1
Missoula, US
1
Saint Louis, US
1
Morgantown, US
1
Bangkok, TH
1
DOI/NPS, Greenbelt Parklocation not on record
1
AUAlocation not on record
1
Wellington, NZ
1
Arcata, US
1
Austin, US
1
US
1
Los Angeles, US
1
Henderson, US
1
Madison, US
1
Durham, US
1
Angwin, US
1
Santa Cruz, US
1
Severin-McDaniel Insect Collectionlocation not on record
1
Chapel Hill, US
1
Caldwell, US
1
INFlocation not on record
1
50 institutions · 265 of 325 vouchered records shown · 60 without an institution code
