Cirsium douglasii

DC. · species

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Plantae/Tracheophyta/Magnoliopsida/Asterales/Asteraceae/Cirsium

At a glance

Occurrence records208

Data sources12

Biological traits11

DNA specimens1

eDNA detections1

Sources12 archives

Databases and archives Cirsium douglasii's data was compiled from.

WikipediaWikimedia Foundation2 languages↗

BioWikiNetmultilingual Wikipediamultilingual↗

GBIFGlobal Biodiversity Information Facility208 records↗

ENAEuropean Nucleotide Archive · EMBL-EBI1 eDNA detections↗

BOLD SystemsCentre for Biodiversity Genomics1 specimens↗

NCBIUS National Library of Medicinesequences↗

GRIN TaxonomyUSDA-ARSdistribution & uses↗

Open Tree of LifeOpenTreephylogeny backbone↗

CCDBChromosome Counts DB · Tel Aviv U.genome & karyotype↗

GoaTGenomes on a Tree · Sangergenome & karyotype↗

PloiDBPloidy Databasegenome & karyotype

Tree of SexTree of Sex Consortiumgenome & karyotype↗

On this page6 sections

Every layer below draws on the sources above — open one to explore it, or use ← → to move between tabs.

NarrativeWikipediaarticle

Traits & measurements2 literature sources11 traits

Occurrence & distributionGBIF208 records

Environmental DNA1 datasets · 0 countries1 detections

DNA & barcodingBOLD · NCBI1 specimens

Genome at a glanceCCDB · GoaT · TreeOfSex2n = 30

01Narrative

Cirsium douglasii is a species of thistle known by the common names Douglas' thistle and California swamp thistle. It is native to the central coast and northern California ranges, foothills, and plateaus, and adjacent parts of southern Oregon and northwest Nevada.Biota of North America Program 2014 county distribution map It grows in wet places in a number of types of habitat.Calflora taxon report, University of California, Cirsium douglasii DC., Douglas' thistle, swamp thistle

No narrative description available for this taxon yet.

02Traits & measurements

SourcesGIFTTRY

Size & morphology3

Seed mass3.13 mg

Seed mass max3.31 mg

Seed mass min2.96 mg

Life cycle & reproduction2

Life spanperennial

⚠ sources differ — TRY: perennial · GIFT: biennial

Raunkiær life formtherophyte

Diet & foraging1

Parasiteindependent

Habitat & environment5

Aquaticterrestrial

Climberself-supporting

Epiphyteterrestrial

Growth formherb

Woodinessnon-woody

05DNA & barcoding1 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 Cirsium douglasii has left across the world's sequence archives.

At a glance

DNA specimens1

Marker genes3

GenBank sequences5

eDNA detections1

Countries1

The DNA barcodea real sequence read deposited for this species

ITSMN335159.1 ↗549 bpUSA · 2001

ACGT

GGGGGTCGGGCGTCAGCCCGGTCTCTGCGATGCCTCGTCGACGTGCGTCCGCGATGCCTCGTTTCGAGGCGTCGTGGATGTTGCGTCGGC …

Cirsium douglasii var. douglasii voucher RENO 13690 internal transcribed spacer 1, partial sequence; 5.8S ribosomal RNA gene, complete sequence; and internal transcribed spacer 2, partial sequence

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.

★matK2★ITS3★ITS2

plant barcodefungal barcode

06Genome at a glanceCCDB · GoaT · TreeOfSex

The complete instruction manual Cirsium douglasii 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 = 30 n = 15

Ploidydiploid inferred

Chromosome records30–342n range30median30mode4records

Chromosome-count records — grouped by value · 2n = full set, n = gamete · click a value for sources & references

2n 303×GoaT · Tree of Sex Database · CCDB · eflora · TreeOfSex · plant

GoaT · Tree of Sex Database — ↗

CCDB · eflora

TreeOfSex · plant — Goldblatt1979 ↗

2n 341×CCDB · eflora

CCDB · eflora

Ploidy records — measured levels and diploid/polyploid inferences · click for sources

diploid inferred1×PloiDB · genus-scale

PloiDB · genus-scale — chromEvol; reliability=1.000 ↗

08Occurrence & distribution

Record type208 records

Wild obs. + sensor170

Museum / vouchered38

Range

Area of Occupancy AOO408 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 accuracy91% within 1 km

≤100 m 108≤1 km 10≤10 km 6>10 km 6

130 georeferenced · 40 without coordinates

Open the mapobservation + sensor170

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 accuracy92% within 1 km

≤1 km 11≤10 km 1

12 georeferenced · 26 without coordinates

Open the institutions mapphysical evidence38

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 institutions10 of 14 geolocated

Institutions and collections holding physical, vouchered specimens of this species — click a row to fly to it on the map.

Institution	Specimens
Canadian Department of Agriculturelocation not on record	7
Davis, US	6
Flagstaff, US	4
Bronx, US	4
HJAEFlocation not on record	2
Henderson, US	2
DOI/NPS, Little Rock Central High School National Historic Sitelocation not on record	2
Santa Barbara, US	2
Provo, US	1
Philadelphia, US	1
Riverside, US	1
Chicago, US	1
CASlocation not on record	1
Moscow, US	1

14 institutions · 35 of 38 vouchered records shown · 3 without an institution code

09Environmental DNA1 detections

Where the DNA of Cirsium douglasii 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

Signal confidence: weakweighed across independent studies, places & mapped detections

Where its DNA was found

0 of 1 detections have coordinates

Open the map0 countries0

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.

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.

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