Pseudognaphalium saxicola, common name cliff cudweed or rabbit-tobacco, is a rare plant species endemic to Wisconsin. It grows on ledges and in cracks in shaded limestone cliff-faces, usually those facing south or east.Flora of North AmericaNesom, G. L. 2004d. Pseudognaphalium canescens(Asteraceae: Gnaphalieae) and putative relatives in western North America. Sida 21: 781–790. Pseudognaphalium saxicola is an annual, covered with a thick coat of dense, woolly hairs. It produces a cluster of 2–4 small flower heads at the tips of the branches.Ballard, Harvey Eugene, & Feller, Danielle Sky. Sida 21(2): 777. 2004.Fassett, Norman Carter. Rhodora 33(387): 75. 1931.Cronquist, Arthur John. Rhodora 48(570): 121. 1946.
No narrative description available for this taxon yet.
Compounds documented for Pseudognaphalium obtusifolium across natural-product and food-composition databases — not just the ~150 nutrients on a classic label ("nutritional dark matter").
Compound class profile1 class
Flavonols2
Documented compounds2 total
Compound
Class
Amount
Source
3,5,7-Trihydroxy-6,8-dimethoxyflavone
present
LOTUS
Gnaphaliin
present
LOTUS
05DNA & barcoding14 specimens
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 Pseudognaphalium obtusifolium has left across the world's sequence archives.
At a glance
DNA specimens14
Marker genes4
eDNA detections9
Countries2
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.
★rbcL★rbcLa★ITS★ITS2
plant barcodefungal barcode
06Genome at a glanceCCDB
The complete instruction manualPseudognaphalium obtusifolium 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 = 28 n = 14
Ploidypolyploid inferred
Chromosome-count records — grouped by value · 2n = full set, n = gamete · click a value for sources & references
2n 281×CCDB · book-ipcn67-71
CCDB · book-ipcn67-71 — SMITH, E.B. 1969. In IOPB chromosome number reports XXII. Taxon 18: 433-442.
Ploidy records — measured levels and diploid/polyploid inferences · click for sources
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 origin1.44 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 type8 896 records
Wild obs. + sensor7 133
Museum / vouchered1 763
Origin
Native3
Range
Area of Occupancy AOO25 884 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 accuracy84% within 1 km
≤100 m 4 291≤1 km 655≤10 km 300>10 km 632
5 878 georeferenced · 1 255 without coordinates
Open the mapobservation + sensor7 133
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 accuracy41% within 1 km
≤100 m 143≤1 km 286≤10 km 477>10 km 133
1 039 georeferenced · 724 without coordinates
Open the institutions mapphysical evidence1 763
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 institutions72 of 107 geolocated
Institutions and collections holding physical, vouchered specimens of this species — click a row to fly to it on the map.
Institution
Specimens
Chongqing Museumlocation not on record
222
Wuzhou, CN
177
Bloomington, US
120
Bangkok, TH
94
St. Paul, US
87
University of Stellenboschlocation not on record
69
Ann Arbor, US
62
Tampa, US
61
Saint Louis, US
57
College Park, US
49
Austin, US
46
University of New Hampshirelocation not on record
45
Jackson, US
43
Burlington, US
41
Jena Microbial Resource Collectionlocation not on record
38
Madison, US
33
Columbia, US
32
Emporia, US
28
GAlocation not on record
26
Chadron, US
21
Norfolk, US
21
Fort Worth, US
20
Green Bay, US
18
Chapel Hill, US
16
Valdosta State Universitylocation not on record
15
Dekalb, US
15
Mississippi State, US
13
Clemson, US
13
Keene State Universitylocation not on record
13
Florida Museum of Natural History- Zoology, Paleontology & Paleobotanylocation not on record
12
Fayetteville, US
10
Bronx, US
9
US
9
GB
9
Williamsburg, US
9
Millersville, US
8
Chicago, US
8
Museo civico La Terra e l'Uomo di Crocetta del Montellolocation not on record
8
AUAlocation not on record
8
Whitewater, US
8
Mount Berry, US
7
Pittsburg, US
7
DOI/NPS, Greenbelt Parklocation not on record
5
Montréal, CA
5
Museum of the Rockieslocation not on record
5
University of Tennessee at Chattanoogalocation not on record
5
Fairfax, US
5
McWane Science Centerlocation not on record
5
BAYLUlocation not on record
5
China Agricultural Universitylocation not on record
5
Lord Fairfax Community Collegelocation not on record
5
Tall Timbers Research Stationlocation not on record
4
Denver, US
4
Jefferson City, US
4
Hudson, US
4
DOI/NPS, Little Rock Central High School National Historic Sitelocation not on record
3
Richmond, US
3
Asheville, US
3
Baltimore, US
3
Phoenix, US
3
Durham, US
3
James F. Matthews Center for Biodiversity Studieslocation not on record
3
Little Rock, US
3
Dover, US
3
Albuquerque, US
2
Riverside, US
2
Flagstaff, US
2
Saint John, CA
2
Lubbock, US
2
Northridge, US
2
EL PASO, US
2
Oskarshamn, SE
2
Pullman, US
2
Stockholm, SE
2
Tempe, US
2
Royal Ontario Museum, Green Plant Herbarium (TRT)location not on record
2
Johnson City, US
2
New Brunswick, US
2
Kirksville, US
2
LDlocation not on record
2
Toronto, CA
2
Philadelphia, US
2
Springfield, US
2
Philadelphia, US
1
Florida Museum of Natural Historylocation not on record
1
University of North Carolina at Pembrokelocation not on record
1
North Carolina Museum of Natural Scienceslocation not on record
1
Barcelona, ES
1
Canadian Department of Agriculturelocation not on record
1
Beijing, CN
1
Tennessee Technological Universitylocation not on record
1
Texas Lutheran Universitylocation not on record
1
Audubon Society -- Silver Bluff Audubon Center and Sanctuarylocation not on record
1
Musee des Dinosaures d'Esperaza (Aude)location not on record
1
Acadia Universitylocation not on record
1
Berlin, DE
1
Moscow State Universitylocation not on record
1
Mexico City, MX
1
Tuscaloosa, US
1
Columbus State Universitylocation not on record
1
Kew, GB
1
Davis, US
1
Oswego, US
1
Fredericksburg, US
1
Mount Pleasant, US
1
Weymouth Woods Sandhills Nature Preservelocation not on record
1
DOI/NPS, Selma to Montgomery National Historic Traillocation not on record
1
107 institutions · 1 757 of 1 763 vouchered records shown · 6 without an institution code
09Environmental DNA9 detections
Where the DNA of Pseudognaphalium obtusifolium 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 found9
Studies independent surveys1
Countries2
Signal confidence: weakweighed across independent studies, places & mapped detections
Where its DNA was found
0 of 9 detections have coordinates
Open the map2 countries0
In Phleum pratense dominated clearing in Bet…Dry pasture near river bank, N bank of Thame…Edge of bluffAbandoned field; shrub-dominated succesion
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 median19.4 °C 10.5–23.4
Seasonal swing summer↔winter29.1 °C
Max temp (day)22.6 °C 14.9–28.0
Min temp (night)16.5 °C 7.70–20.3
Precipitation90.9 mm/mo 86.5–113
Air humidity59.7 % 58.1–60.0
Moisture balance-26.2 mm/mo -51.0–16.7
Vapour deficit949 Pa 536–1,160
Wind speed3.60 m/s 2.50–5.00
Cloud cover39.7 % 31.4–56.5
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 Facility8 896 records↗
ENAEuropean Nucleotide Archive · EMBL-EBI9 eDNA detections↗
BOLD SystemsCentre for Biodiversity Genomics14 specimens↗
LOTUSNatural Products (Wikidata)compounds↗
GRIN TaxonomyUSDA-ARSdistribution & uses↗
Open Tree of LifeOpenTreephylogeny backbone↗
CCDBChromosome Counts DB · Tel Aviv U.genome & karyotype↗
PloiDBPloidy Databasegenome & karyotype
GLoBIGlobal Biotic Interactionsbiotic interactions↗