Pseudognaphalium canescens (syn. Gnaphalium canescens) is a species of flowering plant in the family Asteraceae known by the common name Wright's cudweed. It is native to western North America from western Canada to northern Mexico. It can be found in many habitats, from mountains to plateau to coastline. The many-branched stem is erect to a maximum height of around a meter. It is gray-green and woolly with many narrow leaves. Atop the stem branches are inflorescences of several pointed oval-shaped pale yellowish, cream, or white flower heads. Each woolly head is a few millimeters across and contains many tiny flowers.
No narrative description available for this taxon yet.
Compounds documented for Pseudognaphalium canescens across natural-product and food-composition databases — not just the ~150 nutrients on a classic label ("nutritional dark matter").
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 canescens has left across the world's sequence archives.
At a glance
DNA specimens3
Marker genes3
eDNA detections1
Countries1
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.
★matK★rbcLa★ITS2
plant barcodefungal barcode
06Genome at a glanceCCDB
The complete instruction manualPseudognaphalium canescens 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 · eflora
CCDB · eflora
n 141×CCDB · ipcn-api-dl
CCDB · ipcn-api-dl — Keil, D. J. & D. J. Pinkava. 1976. Chromosome counts and taxonomic notes for Compositae from the United States and Mexico. Amer. J. Bot. 63: 1393–1403.
Ploidy records — measured levels and diploid/polyploid inferences · click for sources
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 141≤1 km 32≤10 km 16>10 km 10
199 georeferenced · 67 without coordinates
Open the mapobservation + sensor266
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 accuracy78% within 1 km
≤100 m 135≤1 km 50≤10 km 44>10 km 9
238 georeferenced · 278 without coordinates
Open the institutions mapphysical evidence516
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 institutions41 of 58 geolocated
Institutions and collections holding physical, vouchered specimens of this species — click a row to fly to it on the map.
Institution
Specimens
Austin, US
84
Mexico City, MX
54
San Diego, US
54
Phoenix, US
41
EL PASO, US
34
ASUlocation not on record
31
Zacatecas, MX
26
Albuquerque, US
22
Guasave, MX
15
San Luis Obispo, US
13
Santa Barbara, US
12
Austin, US
9
Flagstaff, US
8
Saint Louis, US
8
Claremont, US
8
Severin-McDaniel Insect Collectionlocation not on record
7
Pullman, US
6
BAYLUlocation not on record
6
Juriquilla, MX
5
Bloomington, US
4
Wuzhou, CN
4
DOI/NPS, Greenbelt Parklocation not on record
3
Davis, US
3
Denver, US
3
Musee des Dinosaures d'Esperaza (Aude)location not on record
3
Durango, MX
3
Bangkok, TH
3
Anchorage, US
3
BClocation not on record
3
University of Stellenboschlocation not on record
2
Ann Arbor, US
2
Kew, GB
2
Sociedad para el Estudio de los Recursos Bióticos de Oaxaca, A. C.location not on record
2
San Angelo, US
2
Arcata, US
2
Hermosillo, MX
2
Giardini Botanici Hanburylocation not on record
2
Fort Worth, US
2
US
2
Tlalnepantla, MX
2
Santa Cruz, US
2
Ensenada, MX
1
Chongqing Museumlocation not on record
1
Los Angeles, US
1
Moscow, US
1
Facultad de Zootecnia y Ecología, Universidad Autónoma de Chihuahualocation not on record
1
The University of Arizonalocation not on record
1
Ciudad de México, MX
1
MEXUlocation not on record
1
La Paz, MX
1
CIIDIRlocation not on record
1
Cambridge, US
1
Riverside, US
1
San Diego Natural History Museum, Herbariumlocation not on record
1
USFSlocation not on record
1
Turlock, US
1
Logan, US
1
University of Alberta Museumslocation not on record
1
58 institutions · 516 of 516 vouchered records shown
09Environmental DNA1 detections
Where the DNA of Pseudognaphalium canescens 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
Rhus ovata, Prosopis, Acacia greggii, Yucca …
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 median15.6 °C 15.6–15.6
Seasonal swing summer↔winter16.8 °C
Max temp (day)23.2 °C
Min temp (night)8.80 °C
Precipitation27.8 mm/mo
Air humidity51.7 %
Moisture balance-128 mm/mo
Vapour deficit861 Pa
Wind speed4.40 m/s
Cloud cover32.0 %
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.
WikipediaWikimedia Foundation2 languages↗
BioWikiNetmultilingual Wikipediamultilingual↗
GBIFGlobal Biodiversity Information Facility782 records↗
ENAEuropean Nucleotide Archive · EMBL-EBI1 eDNA detections↗
BOLD SystemsCentre for Biodiversity Genomics3 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↗